Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)
RVD(diag)

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Basic Diagnostic Procedure
PROCEDURE

1. PERFORM CUSTOMER INTERVIEW.

Ask the customer when and how the trouble occurred using the interview check list. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Check List for Interview

Did you interview the customer?

2

Perform the interview, and 2

2. PERFORM BASIC INSPECTION.

Perform basic inspection.

Is the check result OK?

3

Repair the faulty part found in basic inspection, and 3

3. CHECK SUBARU SELECT MONITOR COMMUNICATION.
1.

Turn the ignition switch to OFF.

2.

Connect the Subaru Select Monitor to data link connector. COMMON(diag)>Data Link Connector

3.

Turn the ignition switch to ON and run the Subaru Select Monitor.

4.

Select [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)].

For detailed operation procedures, refer to “Help” of application.

Is communication possible?

4

Check the communication circuit. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure for Subaru Select Monitor Communication

4. CHECK DTC AND CANCEL CODE.

Using the Subaru Select Monitor, read the DTCs and cancel codes of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Cancel Code

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is any DTC or cancel code displayed? (Current malfunction)

Record the DTC, time stamp and freeze frame data, and 5

Perform diagnosis according to the procedures in the diagnostics with phenomenon. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostics with Phenomenon

5. PERFORM DIAGNOSIS.
1.

Perform the diagnosis for the displayed DTCs or cancel codes. (Perform the diagnosis for the side that displayed DTCs or cancel codes.)

2.

Repair or replace the cause of trouble.

3.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

4.

Execute the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

5.

Using the Subaru Select Monitor, read the DTCs or cancel codes of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Cancel Code

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is any DTC or cancel code displayed? (Current malfunction)

Repeat step 5 until DTC is not shown. 5

Finish the diagnosis.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Check List for Interview
CHECK

Inspect the following items regarding the vehicle’s state.

Blind Spot Detection/Rear Cross Traffic Alert Check List for Interview | Date of Vehicle Bring-in   Year   Month   Date
Customer’s name | Registration No. | Initial year of registration Year   Month  Date
Vehicle model | Frame number
Interviewer | Inspector | Engine type | Odometer reading
Customer specified content • • •
Date when problem occurred | Year    Month  Date | Frequency of trouble occurrence | Always occurs Sometimes occurs (   times per day,    times per month)
Condition of trouble occurrence (How the trouble occurs) |  | Weather | Fine • Cloudy • Rainy • Snowy • Others (      )
Temperature | °C (°F) —   °C (°F)
Road conditions |  | Occurrence location |
Accessory installation condition |
Confirmation of trouble condition |
Diagnostic trouble code |

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
CAUTION
1. BSD/RCTA

1. In some cases, BSD/RCTA may not work correctly under the following conditions.

   - In bad weather such as heavy rain, fog, snow, sand storm, etc.

   - When ice, snow, dirt, etc. cover the rear bumper.

   - When the rear bumper has scratches or deformation in the area of the radar sensor.

   - When a difference of vehicle speeds between your own vehicle and another vehicle within the detection range is too large.

   - When there is another vehicle remaining within the detection range while your own vehicle starts from stationary state.

   - While driving on a steep slope with a series of uphills and downhills.

   - While driving on a wet road with such as puddles.

   - When more than one vehicle is approaching one after another with a short distance.

   - When vehicle speed of your own vehicle is almost the same as that of the vehicle within the detection range.

   - When a difference of the vehicle heights between your own vehicle and another vehicle in the next lane is too large.

   - Immediately after operating the BSD/RCTA OFF switch.

   - On wide lanes, when another vehicle of the next lane drives along the opposite edge so the distance is too large for the detection.

2. Basically, BSD/RCTA does not detect the following types of vehicle as well as objects other than vehicles; however, it may detect them depending on circumstances.

   - Oncoming vehicle

   - Small motorcycle, bike, pedestrian, etc.

   - Vehicle following behind on the same lane

   - Stationary objects such as guardrail, wall, sign and parked vehicle

   - Another vehicle driving on two lanes away

3. BSD/RCTA may perform unnecessary detection in the following conditions.

   - When guardrails or walls are close enough to be within the detection range.

   - When distance from the vehicle behind is short.

   - On narrow lanes, when another vehicle driving on two lanes away enters the detection range.

4. Radar sensors of BSD/RCTA are each located on LH and RH sides. Always observe the followings for proper operation of the system.

   - Always clean the vicinity of radar sensors.

   - Do not give a strong impact to the radar sensor areas. Displacement of the radar sensors may result in improper operation of the system such that it may not detect the vehicle entering the detection range.

   - Do not disassemble the radar sensors.

   - Do not scratch or deform the bumper areas with the radar sensors.

     Replace the rear bumper in the following cases.

     - When there is any collision trace or dent inside the radar projection area.

     - When there is any scuffed (chipped off) section inside the radar projection area on the resin bumper.

     - When there is any crack inside the radar projection area.

     Radar projection area

     (a) | Radar projection area |  |  |  |

     For other flaws, perform the sensor readjustment. If no problem is found, replacement is unnecessary.

   - Do not put a sticker, etc. on/around the radar sensors.

   - Do not retrofit the radar sensors or the bumper close to the radar sensors.

   - Do not repaint the radar sensors or the bumper close to the radar sensors.

     If there is any painting defect inside the radar projection area, replace the rear bumper without trying to repair it.

   - Do not give a strong impact, force or drop-off to the radar sensors because they are precision devices.

   - Do not reuse the radar sensors that were affected by strong impact, force, or fell off.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
INSPECTION
1. BASIC INSPECTION

Before performing diagnosis, check the following items that might provoke the problems related to BSD/RCTA.

1.

Check the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery

2.

Check the relay and fuse condition. Blind Spot Detection/Rear Cross Traffic Alert>Relay and Fuse

3.

Check the connecting condition of harness and connector. Also check grounding.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
PREPARATION TOOL
1. SPECIAL TOOL

ILLUSTRATION | TOOL NUMBER | DESCRIPTION | REMARKS
| — | SUBARU SELECT MONITOR 4 | Used for setting of each function and troubleshooting for electrical system. For detailed operation procedures, refer to “Help” of application.

2. GENERAL TOOL

TOOL NAME | REMARKS
Circuit tester | Used for measuring resistance, voltage and current.
DST-i | Used together with Subaru Select Monitor 4.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description
SYSTEM BLOCK DIAGRAM

- BSD/RCTA system is configured by the following components.

- There is a control ECM in the radar sensor main body, which performs the vehicle identification and the alert judgment control.

- The LH/RH radar sensors are identified as Master/Slave for control purposes. They are connected by the private CAN to execute the controls through mutual communication. The radar on the Master side receives the input from the vehicle CAN and the BSD/RCTA OFF switch, so information necessary for control can be obtained from other modules via the vehicle CAN.

- The outer mirror LED is directly driven by the signal from the radar sensor.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Electrical Component Location
LOCATION

(1) | Outer mirror ASSY RH | (4) | Outer mirror ASSY LH | (7) | VDC CM
(2) | Navigation unit | (5) | Radar sensor RH (slave) | (8) | TCM
(3) | Combination meter | (6) | Radar sensor LH (master) | (9) | Body integrated unit

(1) | BSD/RCTA OFF switch | (2) | Data link connector

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Control Module I/O Signal
ELECTRICAL SPECIFICATION
1. RADAR SENSOR

Terminal No. | Contents | Measuring condition | Standard
Radar sensor LH (master) | Radar sensor RH (slave)
(R25) or (R61) No. 1 ←→ Chassis ground | Private CAN H | Private CAN H | Always | 1 MΩ or more
(R25) or (R61) No. 2 ←→ Chassis ground: | Master CAN H | — | Always | 1 MΩ or more
(R25) or (R61) No. 3 ←→ Chassis ground | — | — | — | —
(R25) or (R61) No. 4 ←→ Chassis ground | Left mirror LED output | Right mirror LED output | Ignition switch OFF → ON BSD/RCTA OFF switch OFF → ON | When indicator is ON: 2.5 — 10.5 V When indicator is blinking: 0 ←→ 2.5 — 10.5 V When indicator is OFF: Less than 1 V
(R25) or (R61) No. 5 ←→ Chassis ground | Ignition power supply | Ignition power supply | Ignition switch OFF → ON | Less than 1 V → 9 — 16 V
(R25) or (R61) No. 6 ←→ Chassis ground | Private CAN L | Private CAN L | Always | 1 MΩ or more
(R25) or (R61) No. 7 ←→ Chassis ground | Master CAN L | — | Always | 1 MΩ or more
(R25) or (R61) No. 8 ←→ Chassis ground | BSD/RCTA OFF switch | — | Ignition switch ON BSD/RCTA OFF switch OFF → ON (while pressing and holding the switch) | Less than 1 V → 9 — 16 V
(R25) or (R61) No. 9 ←→ Chassis ground | — | — | — | —
(R25) or (R61) No. 10 ←→ Chassis ground | GND | GND | Always | Less than 1 Ω

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Inspection Mode
OPERATION

It is possible to diagnose the DTC by performing the indicated inspection mode. After correcting the DTC, perform a necessary inspection mode and make sure that the function is resumed correctly and the DTC is recorded.

1. INSPECTION MODE 1

DTC | Items | Note
B2304 | Rear RADAR ON-OFF Switch Stuck | —
B2311 | Rear RADAR Detect TCM | —
B2313 | Rear RADAR Detect VDC | —
B2327 | Rear RADAR internal failure (internal electric circuit) | —
B2350 | Rear RADAR Communication error between Master and Slave | —
B2351 | Rear RADAR Lost Communication between Master and Slave | —
U0073 | Control Module Communication Bus Off | —
U0101 | LOST COMMUNICATION WITH TCM | —
U0122 | Lost Communication With Vehicle Dynamics Control Module | —
U0140 | Lost Communication With Body Control Module | —
U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | —
U0402 | INVALID DATA RECEIVED FROM TCM | —
U0416 | Invalid Data Received From VDC | —
U0422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE | —
U0423 | INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE | —
U1235 | LOST COMMUNICATION WITH EyeSight | —
U1433 | INVALID DATA RECEIVED FROM EyeSight | —

1.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

2.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Start the engine and wait for 30 seconds or more.

4.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

2. INSPECTION MODE 2

DTC | Items | Note
B2300 | REAR RADAR CIRCUIT LOW | —
B2301 | REAR RADAR CIRCUIT HIGH | —

1.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

2.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Start the engine.

4.

Using the Subaru Select Monitor, perform [Active Test] of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Active Test

- [Door mirror indicator active test]

5.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

3. INSPECTION MODE 3

DTC | Items | Note
B2329 | REAR RADAR AXIS ALIGNMENT INCOMPLETE | —

1.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

2.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. After solving the DTC, repeat from step 1).

3.

Perform the adjustment of radar axis.

4.

Read the DTC of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using Subaru Select Monitor and check that the DTC is not displayed. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis for the displayed DTCs. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure for Subaru Select Monitor Communication
INSPECTION

When communication with the radar sensor is impossible

Detecting condition:

- Defective harness connector

- Power supply circuit malfunction

- Defective radar sensor

- Defective CAN communication circuit

- Defective Subaru Select Monitor

Trouble symptom:

Communication is impossible between radar sensor and Subaru Select Monitor.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

1. CHECK FUSE.
1.

Turn the ignition switch to OFF.

2.

Check the fuse for radar sensor LH. Blind Spot Detection/Rear Cross Traffic Alert>Relay and Fuse

Is the check result OK?

2

Replace the fuse. If the replaced fuse has blown out immediately, repair the short circuit to ground in harness between fuse — radar sensor LH.

2. CHECK HARNESS (OPEN CIRCUIT).
1.

Disconnect the radar sensor LH connector.

2.

Turn the ignition switch to ON.

3.

Using a tester, measure the voltage between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 5 (+) — Chassis ground (−):

Is the voltage 10 V or more?

3

Repair the open circuit of harness between fuse — radar sensor LH connector.

3. CHECK HARNESS (OPEN CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Using a tester, measure the resistance between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 10 − Chassis ground:

Is the resistance less than 1 Ω?

4

Repair the open circuit in harness between radar sensor and chassis ground.

4. CHECK LAN SYSTEM.
1.

Connect the radar sensor LH connector.

2.

Inspect LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure

Is the check result OK?

5

Perform the inspection according to the diagnosis for LAN system.

5. CHECK SUBARU SELECT MONITOR.
1.

Connect the select monitor to another vehicle.

2.

Check whether the communication for initializing can be executed normally.

Is communication normal?

6

Repair or replace the Subaru Select Monitor.

6. CHECK RADAR SENSOR.

Communicate with the radar sensor.

Is communication possible?

- The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

- In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

- Replace the radar sensor LH, when communication with the radar sensor LH is not possible. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Replace the radar sensor RH, when communication with the radar sensor RH is not possible and the radar sensor LH displays DTC B2350. Otherwise, replace the radar sensor LH. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Data Monitor
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Data Monitor

- For details on the data monitor, refer to the list. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Data Monitor>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Data Monitor
LIST

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Items | Contents | Standard/Unit | Note
SRVD System fail flag | Current failure status of BSD/RCTA system is displayed. | Normal Fail | —
SRVD System HALT flag | Current temporary stop status of BSD/RCTA system is displayed. Temporary stop: Temporarily stops when reception of radar sensor waves failed due to some obstacles or when the temperature is not within the range of −40°C (−40°F) — 85°C (185°F). Temporarily stops when the direction of the radar sensor is not correct. | Normal Halt | —
SRVD System ON-OFF flag | ON/OFF status of BSD/RCTA system is displayed. If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch. | OFF ON | —
LH-Side BSD caution 1st flag | ON is displayed when the 1st stage BSD warning on the left side is activated (when the outer mirror assembly illuminates). | OFF ON | —
LH-Side LCA caution 1st flag | ON is displayed when the 1st stage LCA warning on the left side is activated (when the outer mirror assembly illuminates). | OFF ON | —
LH-Side RCTA caution flag | ON is displayed when the RCTA warning on the left side is activated (when the outer mirror assembly illuminates and buzzer sounds). | OFF ON | —
LH-Side Radar Voltage value | Power supply voltage of the radar sensor LH is displayed. | 0 — 25.5 V | —
LH-Side Temperature value | Ambient temperature of the radar sensor LH is displayed. | −128 — 127°C | —
Vehicle Series status | Vehicle recognition status | Impreza Type Forester Type − B Series WRX Type ASCENT Type | —
Vehicle Type Series status | Vehicle type recognition status | SDN WGN OBK/XV | —
brightness Mode | Indicator brightness | Day Night | —
Destination Type | Destination status | Japan U.S.A Canada EU EK reserve Australia China − | —
LH-Side Autoalignment Result | Left side radar auto alignment result | −3276.8 — 3276.8 deg | —
Emergency Lane Keep Setting | Presence or absence of ELK | Support Not Exist | —
EyeSight Setting | Presence or absence of the EyeSight | Support Not Exist | —

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

Items | Contents | Standard/Unit | Note
SRVD System fail flag | Current failure status of BSD/RCTA system is displayed. | Normal NG | —
SRVD System HALT flag | Current temporary stop status of BSD/RCTA system is displayed. Temporary stop: Temporarily stops when reception of radar sensor waves failed due to some obstacles or when the temperature is not within the range of −40°C (−40°F) — 85°C (185°F). Temporarily stops when the direction of the radar sensor is not correct. | Normal Halt | —
SRVD System ON-OFF flag | ON/OFF status of BSD/RCTA system is displayed. If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch. | OFF ON | —
RH-Side BSD caution 1st flag | ON is displayed when the 1st stage BSD warning on the right side is activated (outer mirror assembly illuminates). | OFF ON | —
RH-Side LCA caution 1st flag | ON is displayed when the 1st stage LCA warning on the right side is activated (outer mirror assembly illuminates). | OFF ON | —
RH-Side RCTA caution flag | ON is displayed when the RCTA warning on the right side is activated (when the outer mirror assembly illuminates and buzzer sounds). | OFF ON | —
RH-Side Radar Voltage value | Power supply voltage of the radar sensor RH is displayed. | 0 — 25.5 V | —
RH-Side Temperature value | Ambient temperature of the radar sensor RH is displayed. | −128 — 127°C | —
RH-Side Autoalignment Result | Right side radar auto alignment result | −3276.8 — 3276.8 deg | —

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Freeze Frame Data
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Freeze Frame Data

- For details on freeze frame data, refer to the list. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Freeze Frame Data>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Freeze Frame Data
LIST

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Items | Contents | Standard/Unit | Note
Ignition SW ON Count | Time stamp information LAN SYSTEM (DIAGNOSTICS)>General Description>CAUTION > TIME STAMP | — | —
Count | — | —
Time Count | — | —
SRVD System fail flag | Current failure status of BSD/RCTA system is displayed. | No occurrence Failure | —
SRVD System HALT flag | Current temporary stop status of BSD/RCTA system is displayed. Temporary stop: Temporarily stops when reception of radar sensor waves failed due to some obstacles or when the temperature is not within the range of −40°C (−40°F) — 85°C (185°F). Temporarily stops when the direction of the radar sensor is not correct. | No occurrence Halt | —
SRVD System ON-OFF flag | If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] (which show the ON/OFF status of the BSD/RCTA system) are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch. | OFF ON | —
LH-Side BSD caution 1st flag | ON is displayed when the 1st stage BSD warning on the left side is activated (when the outer mirror assembly illuminates). | OFF ON | —
LH-Side LCA caution 1st flag | ON is displayed when the 1st stage LCA warning on the left side is activated (when the outer mirror assembly illuminates). | OFF ON | —
LH-Side RCTA caution flag | ON is displayed when the RCTA warning on the left side is activated (when the outer mirror assembly illuminates and buzzer sounds). | OFF ON | —
LH-Side Radar Voltage value | Power supply voltage of the radar sensor LH is displayed. | 0 — 25.5 V | —
LH-Side Temperature value | Ambient temperature of the radar sensor LH is displayed. | −128 — 127°C | —
Vehicle Series status | Vehicle recognition status | Impreza Type Forester Type − B Series WRX Type | —
Vehicle Type Series status | Vehicle type recognition status | SDN WGN OBK/XV | —
brightness Mode | Indicator brightness | Day Night | —
Destination Type | Destination status | Japan U.S.A Canada EU EK reserve Australia China − | —
LH-Side Autoalignment Result | Left side radar auto alignment result | −3276.8 — 3276.8 deg | —
SSMID | Identification Option Vehicle Manufacturer Specific Data Identifier | — | —
ROMID | application Data Identification Data Identifier | — | —
ECM Software Ver. | vehicle Manufacturer ECM Software Version Number Data Identifier | — | —
ECM Part No. | vehicle Manufacturer Kit Assembly Part Number Data Identifier | — | —
System | system Name Or Engine Type Data Identifier | — | —

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

Items | Contents | Standard/Unit | Note
Ignition SW ON Count | Time stamp information LAN SYSTEM (DIAGNOSTICS)>General Description>CAUTION > TIME STAMP | — | —
Count | — | —
Time Count | — | —
SRVD System fail flag | Current failure status of BSD/RCTA system is displayed. | No occurrence Failure | —
SRVD System HALT flag | Current temporary stop status of BSD/RCTA system is displayed. Temporary stop: Temporarily stops when reception of radar sensor waves failed due to some obstacles or when the temperature is not within the range of −40°C (−40°F) — 85°C (185°F). Temporarily stops when the direction of the radar sensor is not correct. | No occurrence Halt | —
SRVD System ON-OFF flag | If this flag is set to [OFF] while the values of [SRVD System fail flag] and [SRVD System HALT flag] (which show the ON/OFF status of the BSD/RCTA system) are [Normal], the BSD/RCTA system is set to OFF by the BSD/RCTA OFF switch. | OFF ON | —
RH-Side BSD caution 1st flag | ON is displayed when the 1st stage BSD warning on the right side is activated (outer mirror assembly illuminates). | OFF ON | —
RH-Side LCA caution 1st flag | ON is displayed when the 1st stage LCA warning on the right side is activated (outer mirror assembly illuminates). | OFF ON | —
RH-Side RCTA caution flag | ON is displayed when the RCTA warning on the right side is activated (when the outer mirror assembly illuminates and buzzer sounds). | OFF ON | —
RH-Side Radar Voltage value | Power supply voltage of the radar sensor RH is displayed. | 0 — 25.5 V | —
RH-Side Temperature value | Ambient temperature of the radar sensor RH is displayed. | −128 — 127°C | —
RH-Side Autoalignment Result | Right side radar auto alignment result | −3276.8 — 3276.8 deg | —
SSMID | Identification Option Vehicle Manufacturer Specific Data Identifier | — | —
ROMID | application Data Identification Data Identifier | — | —
ECM Software Ver. | vehicle Manufacturer ECM Software Version Number Data Identifier | — | —
ECM Part No. | vehicle Manufacturer Kit Assembly Part Number Data Identifier | — | —
System | system Name Or Engine Type Data Identifier | — | —

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Active Test
OPERATION
1.

On [Start] screen, select [Diagnosis].

2.

On [Vehicle selection] screen, input the target vehicle information and select [OK].

3.

On [Main Menu] screen, select [Each System].

4.

On [Select System] screen, select [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)], and then select [Enter].

5.

On [Select Function] screen, select [Active Test].

- For detailed operation procedures, refer to “Help” of application.

- For details on active tests, refer to the list. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Active Test>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Active Test
LIST

Active test items | Range | Contents | Execution condition
Door mirror indicator active test | — | Outer mirror assembly indicator is illuminated. | —

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
OPERATION

- For detailed operation procedures, refer to “Common (Diagnostics)”. COMMON(diag)>Diagnostic Trouble Code (DTC)

- For details on DTCs, refer to the list. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Trouble Code (DTC)
LIST

Code | [Description & trouble part] | Reference
B2300 | Rear RADAR Circuit Low | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2300 REAR RADAR CIRCUIT LOW
B2301 | Rear RADAR Circuit High | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2301 REAR RADAR CIRCUIT HIGH
B2304 | Rear RADAR ON-OFF Switch Stuck | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2304 REAR RADAR ON-OFF SWITCH STUCK Detect the radar sensor LH (master) only.
B2311 | Rear RADAR Detect TCM | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2311 REAR RADAR DETECT TCM
B2313 | Rear RADAR Detect VDC | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2313 REAR RADAR DETECT VDC
B2327 | Rear RADAR internal failure (internal electric circuit) | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)
B2329 | Rear RADAR axis alignment incomplete | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2329 REAR RADAR AXIS ALIGNMENT INCOMPLETE
B2350 | Rear RADAR Communication error between Master and Slave | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2350 REAR RADAR COMMUNICATION ERROR BETWEEN MASTER AND SLAVE
B2351 | Rear RADAR Lost Communication between Master and Slave | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2351 REAR RADAR LOST COMMUNICATION BETWEEN MASTER AND SLAVE
U0073 | Control Module Communication Bus Off | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF
U0101 | Lost Communication With TCM | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0101 LOST COMMUNICATION WITH TCM
U0122 | Lost Communication With Vehicle Dynamics Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE
U0140 | Lost Communication With Body Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE
U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE
U0402 | Invalid Data Received From TCM | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0402 INVALID DATA RECEIVED FROM TCM
U0416 | Invalid Data Received From Vehicle Dynamics Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE
U0422 | Invalid Data Received From Body Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE
U0423 | Invalid Data Received From Instrument Panel Cluster Control Module | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE
U1235 | LOST COMMUNICATION WITH EyeSight | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1235 LOST COMMUNICATION WITH EyeSight
U1433 | INVALID DATA RECEIVED FROM EyeSight | Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC U1433 INVALID DATA RECEIVED FROM EyeSight

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2300 REAR RADAR CIRCUIT LOW

DTC detecting condition:

- Short circuit to ground in the harness between radar sensor — outer mirror assembly.

- Ground short circuit of the harness in outer mirror assembly module (Malfunction of the outer mirror assembly)

- Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

- Radar sensor LH

- Radar sensor RH

Check and replace the side that displayed the DTC.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2327 displayed? (Current malfunction)

Perform the diagnosis of DTC B2327. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)

2

2. CHECK DTC.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2300 displayed? (Current malfunction)

3

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

3. CHECK OUTER MIRROR ASSEMBLY INDICATOR.

Using the Subaru Select Monitor, perform [Active Test] of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Active Test

- Door mirror indicator active test

Does the outer mirror assembly indicator illuminate?

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

4

4. CHECK HARNESS (GROUND SHORT CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Disconnect the radar sensor connector.

3.

Disconnect the outer mirror assembly connector.

4.

Using a tester, measure the resistance between radar sensor connector (harness side) and the chassis ground.

Connector & terminal

Radar sensor LH

(R25) No. 4 — Chassis ground:

Radar sensor RH

(R61) No. 4 — Chassis ground:

Is the resistance 1 MΩ or more?

5

Repair the short to ground in harness between radar sensor connector and outer mirror assembly connector.

5. CHECK CONNECTOR.

Check the radar sensor connector and the outer mirror assembly connector. (Insecure connection, poor contact, etc.)

Is the check result OK?

6

Repair the connector.

6. CHECK OUTER MIRROR ASSEMBLY.

Perform unit-check for the outer mirror assembly. GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly

Is the check result OK?

7

Replace the outer mirror assembly. GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly

7. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2300 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2301 REAR RADAR CIRCUIT HIGH

DTC detecting condition:

- Open circuit or short circuit to power supply in harness between radar sensor — outer mirror assembly.

- Open circuit or short circuit to power supply of harness in the outer mirror assembly module. (Malfunction of the outer mirror assembly)

- Open circuit or short circuit to power supply of harness between outer mirror assembly — ground.

- Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

- Radar sensor LH

- Radar sensor RH

Check and replace the side that displayed the DTC.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2327 displayed? (Current malfunction)

Perform the diagnosis of DTC B2327. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Diagnostic Trouble Code (DTC)>DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)

2

2. CHECK DTC.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2301 displayed? (Current malfunction)

3

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

3. CHECK OUTER MIRROR ASSEMBLY INDICATOR.

Using the Subaru Select Monitor, perform [Active Test] of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Active Test

- Door mirror indicator active test

Does the outer mirror assembly indicator illuminate?

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

4

4. CHECK HARNESS (OPEN CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Disconnect the radar sensor connector.

3.

Disconnect the outer mirror assembly connector.

4.

Using a tester, measure the resistance between radar sensor connector (harness side) and outer mirror assembly connector (harness side).

Connector & terminal

Radar sensor LH

(R25) No. 4 — (D5) No. 1

Radar sensor RH

(R61) No. 4 — (D15) No. 1

Is the resistance less than 1 Ω?

5

Repair the open circuit of harness between radar sensor connector and outer mirror assembly connector.

5. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Turn the ignition switch to ON.

2.

Using a tester, measure the voltage between radar sensor connector (harness side) and the chassis ground.

Connector & terminal

Radar sensor LH

(R25) No. 4 (+) — Chassis ground (−):

Radar sensor RH

(R61) No. 4 (+) — Chassis ground (−):

Is the voltage less than 1 V?

6

Repair the short circuit to power supply in harness between radar sensor connector and outer mirror assembly connector.

6. CHECK CONNECTOR.
1.

Turn the ignition switch to OFF.

2.

Check the radar sensor connector and the outer mirror assembly connector. (Insecure connection, poor contact, etc.)

Is the check result OK?

7

Repair the connector.

7. CHECK OUTER MIRROR ASSEMBLY.

Perform unit-check for the outer mirror assembly. GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly

Is the check result OK?

8

Replace the outer mirror assembly. GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly

8. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2301 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2304 REAR RADAR ON-OFF SWITCH STUCK

DTC detecting condition:

- BSD/RCTA OFF switch is stuck to ON. (Switch malfunction)

- Switch was left pressed for a prolonged time.

- Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

1. CHECK METER DISPLAY.
1.

Turn the ignition switch to ON.

2.

Check the display of OFF indicator in the combination meter LCD display.

Does the display change according to operation of BSD/RCTA OFF switch?

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  - Temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

  - User may have kept pressing the switch for 30 seconds or more.

2

2. CHECK DATA MONITOR.

Using the Subaru Select Monitor, check the following items in the [Data monitor] of [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Data Monitor

- SRVD System ON-OFF flag

Does the display change according to operation of BSD/RCTA OFF switch?

Check the combination meter. COMBINATION METER (DIAGNOSTICS)>Basic Diagnostic Procedure

3

3. INSPECTION OF SWITCH UNIT.
1.

Turn the ignition switch to OFF.

2.

Perform unit inspection of the BSD/RCTA OFF switch. Blind Spot Detection/Rear Cross Traffic Alert>Switches and Harness

Is the check result OK?

4

Replace the BSD/RCTA OFF switch. Blind Spot Detection/Rear Cross Traffic Alert>Switches and Harness

4. CHECK BATTERY.

Check the battery. STARTING/CHARGING SYSTEMS(H4DO)>Battery

Is the check result OK?

5

Charge or replace the battery.

5. CHECK FUSE.

Check the fuse of BSD/RCTA OFF switch. Blind Spot Detection/Rear Cross Traffic Alert>Relay and Fuse

Is the check result OK?

6

Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in harness between the fuse and the BSD/RCTA OFF switch.

6. CHECK HARNESS (OPEN CIRCUIT).
1.

Disconnect the BSD/RCTA OFF switch connector.

2.

Turn the ignition switch to ON.

3.

Using a tester, measure the voltage between BSD/RCTA OFF switch connector and chassis ground.

Connector & terminal

(i94) No. 6 (+) — Chassis ground (−):

Is the voltage 10 V or more?

7

Repair the open circuit of harness between the fuse — the BSD/RCTA OFF switch.

7. CHECK HARNESS (OPEN CIRCUIT).
1.

Turn the ignition switch to OFF.

2.

Disconnect the radar sensor LH connector.

3.

Using a tester, measure the resistance between BSD/RCTA OFF switch connector and radar sensor LH connector (harness side).

Connector & terminal

(i94) No. 8 — (R25) No. 8:

Is the resistance less than 1 Ω?

8

Repair the open circuit of harness between BSD/RCTA OFF switch — radar sensor LH.

8. CHECK HARNESS (GROUND SHORT CIRCUIT).

Using a tester, measure the resistance between the BSD/RCTA OFF switch connector (harness side) and the chassis ground.

Connector & terminal

(i94) No. 8 — Chassis ground:

Is the resistance 1 MΩ or more?

9

Repair the short circuit to ground in harness between BSD/RCTA OFF switch — radar sensor LH.

9. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Turn the ignition switch to ON.

2.

Using a tester, measure the voltage between the BSD/RCTA OFF switch connector (harness side) and the chassis ground.

Connector & terminal

(i94) No. 8 (+) — Chassis ground (−):

Is the voltage less than 1 V?

10

Repair the short circuit to power supply in harness between BSD/RCTA OFF switch — radar sensor LH.

10. CHECK CONNECTOR.
1.

Turn the ignition switch to OFF.

2.

Check the radar sensor LH connector. (Insecure connection, poor contact, etc.)

Is the check result OK?

11

Repair the connector.

11. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2304 displayed? (Current malfunction)

Replace the radar sensor LH. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2311 REAR RADAR DETECT TCM

DTC detecting condition:

Automatic transmission fails.

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

- AT OIL TEMP light blinks in the combination meter.

Check and replace the side that displayed the DTC.

1. CHECK TRANSMISSION.

Check the transmission. TRANSMISSION (DIAGNOSTICS)>Basic Diagnostic Procedure

Is the check result OK?

2

Perform the inspection according to the diagnosis of the transmission.

2. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2311 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2313 REAR RADAR DETECT VDC

DTC detecting condition:

Vehicle dynamics control (VDC) fails.

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

- VDC warning light illuminates in the combination meter.

Check and replace the side that displayed the DTC.

1. CHECK VDC.

Check the VDC. BRAKE CONTROL (DIAGNOSTICS)>Basic Diagnostic Procedure

Is the check result OK?

2

Perform the inspection according to the VDC diagnosis.

2. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2313 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)

DTC detecting condition:

Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Check and replace the side that displayed the DTC.

1. CHECK BSD/RCTA.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

3.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2327 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2329 REAR RADAR AXIS ALIGNMENT INCOMPLETE

DTC detecting condition:

Axis adjustment of the radar sensor has failed.

(Forced termination of the Subaru Select Monitor, improper location of the target reflector, or deviation of the radar sensor due to impact.)

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Check and replace the side that displayed the DTC.

1. CHECK REAR BUMPER.

Check the rear bumper. (Stickered, trace of repainting, etc.)

Is the check result OK?

2

Replace or repair the bumper. EXTERIOR/INTERIOR TRIM>Rear Bumper

2

2. CHECK RADAR SENSOR BRACKET.
1.

Remove the rear bumper. EXTERIOR/INTERIOR TRIM>Rear Bumper

2.

Check the mounting bracket of the radar sensor as well as its installation position. (Visible damage, deformation, etc.) Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

Is the check result OK?

3

Replace the mounting bracket of the radar sensor, or repair the installation position. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

3

3. ADJUSTMENT OF RADAR SENSOR AXIS.
1.

Install the rear bumper.

2.

Perform the adjustment of radar axis. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

3.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2329 displayed? (Current malfunction)

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2350 REAR RADAR COMMUNICATION ERROR BETWEEN MASTER AND SLAVE

DTC detecting condition:

- Defective harness for CAN communication between radar sensor LH — radar sensor RH

- Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

Check and replace the side that displayed the DTC.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2350 displayed? (Current malfunction)

2

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2. CHECK HARNESS (OPEN CIRCUIT).
1.

Disconnect the radar sensor connectors LH and RH.

2.

Using a tester, measure the resistance between radar sensor RH connector (harness side) and radar sensor LH connector (harness side).

Connector & terminal

(R25) No. 1 — (R61) No. 1:

(R25) No. 6 — (R61) No. 6:

Is the resistance less than 1 Ω?

3

Repair the open circuit of harness between radar sensor RH connector and radar sensor LH connector.

3. CHECK HARNESS (SHORT BETWEEN LINES, GROUND SHORT CIRCUIT).

Using a tester, measure the resistance between radar sensor LH connectors (harness side) and the resistance between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 1 — (R25) No. 6:

(R25) No. 1 — Chassis ground:

(R25) No. 6 — Chassis ground:

Is the resistance 1 MΩ or more?

4

Repair the short circuit of harness between radar sensor RH connector and radar sensor LH connector.

4. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Turn the ignition switch to ON.

2.

Using a tester, measure the voltage between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 1 (+) — Chassis ground (−):

(R25) No. 6 (+) — Chassis ground (−):

Is the voltage less than 1 V?

5

Repair the short to power supply in harness between radar sensor RH connector and radar sensor LH connector.

5. CHECK RADAR SENSOR. (INTERNAL IMPEDANCE).

Using a tester, measure the internal impedance between radar sensor LH and radar sensor RH terminals.

Terminals

Radar sensor LH

No. 1 — No. 6:

Radar sensor RH

No. 1 — No. 6:

Is the resistance approximately 120 Ω?

6

Replace the radar sensor RH or radar sensor LH. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

6. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Turn the ignition switch to ON.

3.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

4.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2350 displayed? (Current malfunction)

Replace the radar sensor on the opposite side of the sensor that displayed the DTC. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B2351 REAR RADAR LOST COMMUNICATION BETWEEN MASTER AND SLAVE

DTC detecting condition:

- Defective harness for CAN communication between radar sensor LH — radar sensor RH

- Defective radar sensor

Trouble symptom:

- All functions of BSD/RCTA stop.

- Fail icon is displayed in the combination meter LCD display.

- Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

Wiring diagram:

BSD/RCTA system WIRING SYSTEM>Blind Spot Detection/Rear Cross Traffic Alert>WIRING DIAGRAM

Check and replace the side that displayed the DTC.

1. CHECK DTC.
1.

Turn the ignition switch to ON.

2.

Using the Subaru Select Monitor, read the DTCs of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Trouble Code (DTC)

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

Is DTC B2351 displayed? (Current malfunction)

2

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2. CHECK HARNESS (OPEN CIRCUIT).
1.

Disconnect the radar sensor connectors LH and RH.

2.

Using a tester, measure the resistance between radar sensor RH connector (harness side) and radar sensor LH connector (harness side).

Connector & terminal

(R25) No. 1 — (R61) No. 1:

(R25) No. 6 — (R61) No. 6:

Is the resistance less than 1 Ω?

3

Repair the open circuit of harness between radar sensor RH connector and radar sensor LH connector.

3. CHECK HARNESS (SHORT BETWEEN LINES, GROUND SHORT CIRCUIT).

Using a tester, measure the resistance between radar sensor LH connectors (harness side) and the resistance between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 1 — (R25) No. 6:

(R25) No. 1 — Chassis ground:

(R25) No. 6 — Chassis ground:

Is the resistance 1 MΩ or more?

4

Repair the short circuit of harness between radar sensor RH connector and radar sensor LH connector.

4. CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY).
1.

Turn the ignition switch to ON.

2.

Using a tester, measure the voltage between radar sensor LH connector (harness side) and chassis ground.

Connector & terminal

(R25) No. 1 (+) — Chassis ground (−):

(R25) No. 6 (+) — Chassis ground (−):

Is the voltage less than 1 V?

5

Repair the short to power supply in harness between radar sensor RH connector and radar sensor LH connector.

5. CHECK RADAR SENSOR. (INTERNAL IMPEDANCE).

Using a tester, measure the internal impedance between radar sensor LH and radar sensor RH terminals.

Terminals

Radar sensor LH

No. 1 — No. 6:

Radar sensor RH

No. 1 — No. 6:

Is the resistance approximately 120 Ω?

6

Replace the radar sensor RH or radar sensor LH. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

6. CHECK BSD/RCTA.
1.

Restore the vehicle to its original state.

2.

Turn the ignition switch to ON.

3.

Using the Subaru Select Monitor, perform the clear memory of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)]. COMMON(diag)>Clear memory

- Blind Spot Detection/Rear Cross Traffic Alert(RH)

- Blind Spot Detection/Rear Cross Traffic Alert(LH)

4.

Perform the inspection mode. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Inspection Mode

Is DTC B2351 displayed? (Current malfunction)

Replace the radar sensor on the side that displayed the DTC. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF

Detected when CAN line abnormality is detected.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0101 LOST COMMUNICATION WITH TCM

Detected when CAN data from TCM does not arrive.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0122 LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE

Detected when CAN data from VDC CM does not arrive.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE

Detected when CAN data from BIU does not arrive.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE

Detected when CAN data from combination meter does not arrive.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0402 INVALID DATA RECEIVED FROM TCM

Received error data from TCM.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0416 INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE

Received error data from VDC CM.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE

Received error data from BIU.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE

Received error data from combination meter.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1235 LOST COMMUNICATION WITH EyeSight

Detected when CAN data from the stereo camera does not arrive.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC U1433 INVALID DATA RECEIVED FROM EyeSight

Error data is received from stereo camera.

Perform the diagnosis for LAN system. LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Cancel Code
OPERATION
1.

On [Start] screen, select [Diagnosis].

2.

On [Vehicle selection] screen, input the target vehicle information and select [OK].

3.

On [Main Menu] screen, select [Each System].

4.

On [Select System] screen, select [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)], and then select [Enter].

5.

On [Select Function] screen, select [Cancel Code].

- For detailed operation procedures, refer to “Help” of application.

- For details concerning cancel codes, refer to the List of Cancel Codes. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Cancel Code>LIST

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Cancel Code
LIST

Code | Item | Contents of diagnosis
B2320 | Rear RADAR Low Voltage (less than 9V) | Temporarily stops because the voltage supplied to radar drops to or below 9 V. Returns to normal when the voltage becomes normal.
B2321 | Rear RADAR High Voltage (more than 16V) | Temporarily stops because the voltage supplied to radar rises to or above 16 V. Returns to normal when the voltage becomes normal.
B2328 | Rear RADAR internal failure (RADAR misalignment) | Deviation of the radar axis prevents normal detection. Returns to normal when the radar axis becomes normal. When B2328 is frequently detected, perform “Diagnostic Procedure with Cancel Code”. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>DTC B2328 REAR RADAR INTERNAL FAILURE (RADAR MISALIGNMENT)
B2340 | RADAR ASSY B&S out of operation temperature range | Temporarily stops because the temperature is outside the operative range (−40°C (−40°F) — 85°C (185°F)). Returns to normal when the ambient temperature falls within the operative range.
B2341 | Rear RADAR degradation of detecting performance | Temporarily stops because some obstacles blocked radar waves of the back and side radar. Returns to normal when the transmission and reception of radar signals becomes normal.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Cancel Code
DTC B2328 REAR RADAR INTERNAL FAILURE (RADAR MISALIGNMENT)

Detecting condition:

- Excessive impact was given to the installation area of the radar sensor, which resulted in deviation of the radar sensor axis.

- Mounting bracket for the radar sensor is deformed.

- Defective radar sensor

TROUBLE SYMPTOMS:

- All functions of BSD/RCTA are temporarily suspended.

- The icon indicating function suspended will be displayed in the combination meter LCD display.

- Function-suspended confirmation will be displayed for approx. two seconds on LCD display in the combination meter.

If DTC B2328 is detected repeatedly, check or replace the part corresponding to the cancel code.

1. CHECK REAR BUMPER.

Check the rear bumper. (Stickered, trace of repainting, etc.)

Is the check result OK?

2

Replace or repair the bumper. EXTERIOR/INTERIOR TRIM>Rear Bumper

2

2. CHECK RADAR SENSOR BRACKET.
1.

Remove the rear bumper. EXTERIOR/INTERIOR TRIM>Rear Bumper

2.

Check the mounting bracket of the radar sensor as well as its installation position. (Visible damage, deformation, etc.) Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

Is the check result OK?

3

Replace the mounting bracket of the radar sensor, or repair the installation position. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

3

3. ADJUSTMENT OF RADAR SENSOR AXIS.
1.

Install the rear bumper.

2.

Perform the adjustment of radar axis. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

3.

Read the [Cancel Code] of [Blind Spot Detection/Rear Cross Traffic Alert(RH)] or [Blind Spot Detection/Rear Cross Traffic Alert(LH)] using the Subaru Select Monitor. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Cancel Code

Is B2328 displayed?

Replace the radar sensor. Blind Spot Detection/Rear Cross Traffic Alert>Radar Sensor

- The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostics with Phenomenon
INSPECTION

Symptoms | Maintenance parts
BSD/RCTA does not operate. | FUSE Blind Spot Detection/Rear Cross Traffic Alert>Relay and Fuse
LAN system LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure
Body control system BODY CONTROL(DIAGNOSTICS)>General Description>INSPECTION > BODY CONTROL SYSTEM
Radar sensor LH
Radar sensor RH
BSD/RCTA cannot be turned OFF. | BSD/RCTA OFF switch Blind Spot Detection/Rear Cross Traffic Alert>Switches and Harness
LAN system LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure
Body control system BODY CONTROL(DIAGNOSTICS)>General Description>INSPECTION > BODY CONTROL SYSTEM
Radar sensor LH
Error message appears in the combination meter. | CHECK CANCEL CODE. Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS)>Cancel Code
Radar sensor LH
Radar sensor RH
Combination meter COMBINATION METER (DIAGNOSTICS)>Basic Diagnostic Procedure
Outer mirror assembly (LH) indicator does not illuminate. | Outer mirror assembly GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly
Radar sensor LH
Outer mirror assembly (RH) indicator does not illuminate. | Outer mirror assembly GLASS/WINDOWS/MIRRORS>Outer Mirror Assembly
Radar sensor RH
Outer mirror assembly (LH) indicator remains on. | Radar sensor LH
Outer mirror assembly (RH) indicator remains on. | Radar sensor RH
Outer mirror assembly (LH) indicator does not blink. | Radar sensor LH
Outer mirror assembly (RH) indicator does not blink. | Radar sensor RH
Outer mirror assembly (LH) indicator keeps blinking. | Radar sensor LH
Outer mirror assembly (RH) indicator keeps blinking. | Radar sensor RH