PARKING BRAKE
PB

PARKING BRAKE > General Description
SPECIFICATION

Item | Specification
Type | Electric type
Clearance adjustment | Automatic adjusting
Operation method | Switch type

PARKING BRAKE > General Description
COMPONENT
1. PARKING BRAKE ACTUATOR

(1) | Mounting bolt | (9) | Pin boot | Tightening torque: N·m (kgf-m, ft-lb) |
(2) | Support rear disc brake | (10) | Guide pin rear brake | T1: | 8 (0.8, 5.9)
(3) | Pad COMPL inner | (11) | Bleeder cap | T2: | 17 (1.7, 12.5)
(4) | Pad COMPL outer | (12) | Bleeder screw | T3: | 25 (2.5, 18.4)
(5) | Pad clip | (13) | Caliper body | T4: | 73 (7.4, 53.8)
(6) | Parking brake actuator | (14) | Boot piston |  |
(7) | O-ring | (15) | Brake disc rear
(8) | Cap

∗: The component cannot be reused when the emergency release of parking brake was performed or when the actuator has a malfunction.

2. ELECTRONIC PARKING BRAKE HARNESS

(1) | Switch ASSY EPB | (3) | Adapter cord EPB RH | Tightening torque: N·m (kgf-m, ft-lb)
(2) | Bracket console COMPL | (4) | Adapter cord EPB LH | T: | 18 (1.8, 13.3)

PARKING BRAKE > General Description
CAUTION

- When performing service operation, refer to “Repair Contents” in “General Description”. REPAIR CONTENTS>Repair Contents

- When performing any work, always wear work clothes, a work cap and protective shoes. Additionally, wear a helmet, protective goggles, etc. if necessary.

- When performing a repair, identify the cause of trouble and avoid unnecessary removal, disassembly and replacement.

- Some vehicle components are extremely hot immediately after driving. Be wary of receiving burns from heated parts.

- Use SUBARU genuine grease, the recommended or equivalent. Do not mix grease etc. of different grades or manufacturers.

- Be sure to tighten fasteners including bolts and nuts to the specified torque.

- Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.

- Apply grease onto sliding or revolving surfaces before installation.

- Be sure that the surface of brake disc and brake pad is free from grease or oil.

PARKING BRAKE > 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 of Subaru Select Monitor 4, refer to “Help” of application.

2. GENERAL TOOL

TOOL NAME | REMARKS
Circuit tester | Used for measuring resistance, voltage and current.
Hexagon wrench | Used for removing and installing the parking brake actuator. Width across flat 5 mm (0.2in)
DST‐i | Used together with Subaru Select Monitor 4.

PARKING BRAKE > Parking Brake System
WIRING DIAGRAM

Refer to “Parking Brake / Brake Fluid Level Warning Light System” in the wiring diagram. WIRING SYSTEM>Parking Brake / Brake Fluid Level Warning Light System>WIRING DIAGRAM

PARKING BRAKE > Parking Brake System
ELECTRICAL SPECIFICATION

Refer to the Control Module I/O Signal of “BRAKE CONTROL (DIAGNOSTICS)”. BRAKE CONTROL (DIAGNOSTICS)>Control Module I/O Signal>ELECTRICAL SPECIFICATION

PARKING BRAKE > Parking Brake System
OPERATION
1. BRAKE MAINTENANCE MODE

- When DTC other than C1984 is detected, repair or replace the faulty parts and perform the brake maintenance mode.

- DTCs may be stored after starting the brake maintenance mode. When the brake maintenance mode is complete, clear the DTCs.

- When the brake maintenance mode is completed, the electronic parking brake automatically operates. Check if any other works are not performed in advance. Sufficient safety consideration is required.

- This function is used when inspecting and repairing the rear brake related parts.

- When the brake maintenance mode is performed, the electronic parking brake warning light and the electronic parking brake operation light illuminate, and DTC C1984 is stored. If the system returns from the brake maintenance mode to the normal mode, the electronic parking brake warning light goes off, and DTC is cleared.

- During the brake maintenance mode, the electronic parking brake cannot be applied/released.

1.

Connect the Subaru Select Monitor.

2.

Turn the ignition switch to ON.

3.

On [Start] screen, select [Diagnosis].

4.

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

5.

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

6.

On [Select System] screen, select [Brake Control System], and then select [Enter].

7.

On [Select Function] screen, select [Work Support].

8.

On the work support item list, select [Brake Maintenance Mode]. And then, start the operation.

9.

After the operation is complete, exit the brake maintenance mode according to the display screen.

PARKING BRAKE > Parking Brake System
INSPECTION

Refer to Basic Diagnostic Procedure of “BRAKE CONTROL (DIAGNOSTICS)”. BRAKE CONTROL (DIAGNOSTICS)>Basic Diagnostic Procedure

PARKING BRAKE > Parking Brake System
NOTE

For procedure of each component in the parking brake system, refer to the respective section.

- Parking brake actuator: PARKING BRAKE>Parking Brake Actuator

- Parking brake switch: PARKING BRAKE>Parking Brake Switch

- Emergency release of parking brake: PARKING BRAKE>Emergency Release of Electronic Parking Brake

PARKING BRAKE > Relay and Fuse
LOCATION

Fuse & relay box (F/B) | Fuse 10 A (EPB control switch) | (A)

For other related fuses, refer to the wiring diagram. WIRING SYSTEM>Power Supply Circuit

PARKING BRAKE > Relay and Fuse
INSPECTION
1. CHECK FUSE
1.

Remove the fuse and inspect visually.

2.

If the fuse is blown out, replace the fuse.

PARKING BRAKE > Parking Brake Assembly (Rear Disc Brake)
NOTE

For the operation procedures of disk brake assembly rear, refer to “BRAKE” section.

- Removal: BRAKE>Rear Disc Brake Assembly>REMOVAL

- Disassembly: BRAKE>Rear Disc Brake Assembly>DISASSEMBLY

- Assembly: BRAKE>Rear Disc Brake Assembly>ASSEMBLY

- Installation: BRAKE>Rear Disc Brake Assembly>INSTALLATION

PARKING BRAKE > Parking Brake Actuator
REMOVAL
1. PARKING BRAKE ACTUATOR

- Do not remove the parking brake actuator except when there are system malfunctions (such as emergency release of parking brake or abnormal actuator) or when the caliper is replaced. When the parking brake actuator is reused, always replace the O-ring with a new part contained in the caliper body.

- Do not reuse the parking brake actuator when the emergency release of parking brake was performed, or when the parking brake actuator has a malfunction. Always replace with a new parking brake actuator.

1.

Release the parking brake.

2.

Using the Subaru Select Monitor, perform the brake maintenance mode. PARKING BRAKE>Parking Brake System>OPERATION > BRAKE MAINTENANCE MODE

3.

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

4.

Lift up the vehicle, and then remove the rear wheels.

5.

Remove the parking brake actuator.

(1)

Disconnect the connector.

Be careful that no water and dust enter inside the connectors.

(2)

Remove the bolts, and remove the parking brake actuator.

When removing the parking brake actuator, do not use any tools. Slide it upward and downward by hand to remove.

Preparation tool:

Hexagon wrench: 5 mm (0.2in)

2. PARKING BRAKE HARNESS
1.

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

- Release the shift lock and shift the select lever to the “N” position. CONTROL SYSTEMS>Select Lever>REMOVAL

- On power seat models, move the front seat all the way forward before disconnecting the ground terminal from the battery sensor.

2.

Remove the console box. EXTERIOR/INTERIOR TRIM>Console Box>REMOVAL

3.

Disconnect the connector.

4.

Lift up the vehicle, and then remove the rear wheels.

5.

Remove the protector tank. FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Fuel Tank Protector>REMOVAL

6.

Remove the adapter cord EPB.

(1)

Remove the grommet (a).

(2)

Remove the clamp (b).

(3)

Remove the clamp (c).

(4)

Remove the clamp (d).

(5)

Remove the clamp (e).

(6)

Remove the clamp (f).

(7)

Remove the clamp (g).

(8)

Disconnect the connector (h).

PARKING BRAKE > Parking Brake Actuator
INSTALLATION
1. PARKING BRAKE ACTUATOR

- Do not remove the parking brake actuator except when there are system malfunctions (such as emergency release of parking brake or abnormal actuator) or when the caliper is replaced. When the parking brake actuator is reused, always replace the O-ring with a new part contained in the caliper body.

- Do not reuse the parking brake actuator when the emergency release of parking brake was performed, or when the parking brake actuator has a malfunction. Always replace with a new parking brake actuator.

1.

Install the parking brake actuator.

Preparation tool:

Hexagon wrench: 5 mm (0.2in)

Tightening torque:

8 N·m (0.8kgf-m, 5.9ft-lb)

2.

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

3.

Using the Subaru Select Monitor, exit the brake maintenance mode. PARKING BRAKE>Parking Brake System>OPERATION > BRAKE MAINTENANCE MODE

4.

After the operation is completed, apply and release the parking brake five times and ensure that the brake operates normally.

5.

Install the rear wheels.

Tightening torque:

120 N·m (12.2kgf-m, 88.5ft-lb)

2. PARKING BRAKE HARNESS
1.

Install the adapter cord EPB.

Tightening torque:

18 N·m (1.8kgf-m, 13.3ft-lb)

2.

Install the protector tank. FUEL INJECTION (FUEL SYSTEMS)(H4DO)>Fuel Tank Protector>INSTALLATION

3.

Install the console box. EXTERIOR/INTERIOR TRIM>Console Box>INSTALLATION

4.

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

5.

Install the rear wheels.

Tightening torque:

120 N·m (12.2kgf-m, 88.5ft-lb)

PARKING BRAKE > Parking Brake Switch
REMOVAL
1.

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

Release the shift lock and shift the select lever to the “N” position. CONTROL SYSTEMS>Select Lever>REMOVAL

2.

Remove the cover assembly front. EXTERIOR/INTERIOR TRIM>Console Box>REMOVAL

3.

Remove the screws to remove the switch assembly EPB.

PARKING BRAKE > Parking Brake Switch
INSTALLATION
1.

Install the switch assembly EPB.

2.

Install the cover assembly front. EXTERIOR/INTERIOR TRIM>Console Box>INSTALLATION

3.

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

After connecting the ground terminal to the battery sensor, place the select lever in the “P” position.

PARKING BRAKE > Parking Brake Switch
INSPECTION
1. CHECK SWITCH ASSEMBLY EPB
1.

Check the resistance between switch assembly EPB terminals.

Preparation tool:

Circuit tester

Switch position | Terminal No. | Standard
Press (Release) | 5 — 2 5 — 4 | Less than 1 Ω
Neutral | 5 — 1 2 — 4 | Less than 1 Ω
Pull (Lock) | 5 — 1 5 — 2 | Less than 1 Ω

2.

Replace the switch assembly EPB if the inspection result is not within the standard value.

2. CHECK ELECTRONIC PARKING BRAKE OPERATION INDICATOR LIGHT

Apply battery voltage between the connector terminals to check the lighting condition of the indicator light and illumination inside the switch.

When applying battery voltage, do not mix up the positive (+) side and the negative (−) side.

Incorrect polarity connection may cause LED damage inside the switch.

- indicator light

  Terminal No. | Inspection conditions | Specification
  6 (+) — 10 (−) | Apply battery voltage. | Light ON

- Illumination light

  Terminal No. | Inspection conditions | Specification
  7 (+) — 9 (−) | Apply battery voltage. | Light ON

PARKING BRAKE > Emergency Release of Electronic Parking Brake
OPERATION

- Perform this operation only when the parking brake must be released in emergency situation such as a system malfunction.

- When performing this procedure, be sure to fully confirm safety in the nearby area and park the vehicle on a horizontal ground.

- Always use the jack-up point when the shop jacks or rigid racks are used to support the vehicle.

- When removing the bolt, the parking brake actuator turns due to reaction force generated by the motor. Be careful not to pinch your hand.

- Wrap the tip of a screwdriver with cloth in order not to damage the caliper body that will be reused.

- Always remove the parking brake actuator while holding it by hand because the parking brake actuator falls off during removal.

1.

Connect the Subaru Select Monitor.

(1)

On [Start] screen, select [Diagnosis].

(2)

On [Select Vehicle] screen, input the target vehicle information and select [Set].

(3)

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

(4)

On [Select System] screen, select [Brake Control], and then select [Enter].

(5)

On [Select Function] screen, select [Work Support].

(6)

On the work support item list, select [Electronic Parking Brakes compulsion Cancellation Mode].

2.

Operate according to the procedures displayed in the Subaru Select Monitor.

3.

With the following procedure, release the parking brake on the unreleased side.

(1)

Disconnect the ground terminal from battery sensor. REPAIR CONTENTS>NOTE > BATTERY

(2)

Set the wheel stoppers to front tires.

(3)

Jack-up the rear side of vehicle and support it with rigid racks.

(4)

Remove the rear wheels.

(5)

Remove the connector and bolt.

Do not insert a tool into the seal surface (a) on the parking brake actuator.

(6)

Put a screwdriver between the parking brake actuator and the support rear disc brake (a), and push out the parking brake actuator.

(7)

Insert a screwdriver into the gap (a) made by pushing the parking brake actuator, and then remove it.

(8)

Turn the caliper body spindle bolt clockwise by approx. 1 rotation.

Turn both the left and right sides clockwise.

Preparation tool:

TORX® E12

(9)

Confirm that the parking brake lock is released and the disc rotor rotates.

(10)

Temporarily install the parking brake actuator.

- When the emergency release of parking brake was performed, replace the parking brake actuator with a new part after the system trouble is resolved.

- Do not connect the connector. It may be locked again due to continuity.

- If the vehicle needs to be moved, cover the connector with vinyl tape to prevent foreign matter from entering, and secure it in an area where no interference occurs.

Tightening torque:

8 N·m (0.8kgf-m, 5.9ft-lb)

(11)

Install the rear wheels.

Tightening torque:

120 N·m (12.2kgf-m, 88.5ft-lb)

(12)

Connect the ground terminal to battery sensor. REPAIR CONTENTS>NOTE > BATTERY

(13)

When the emergency release of parking brake was performed, be sure to perform the inspection related to the parking brake system.

For inspections, refer to Basic Diagnostic Procedure of “BRAKE CONTROL (DIAGNOSTICS)”. BRAKE CONTROL (DIAGNOSTICS)>Basic Diagnostic Procedure

PARKING BRAKE > General Diagnostic Table
INSPECTION

Symptoms | Possible cause | Corrective action
Brake drag | Defective parking brake switch | Replace.
Defective parking brake harness | Replace.
Defective parking brake actuator | Replace.
Loose parking brake actuator and support installation bolt | Tighten to the specified torque.
Noise from brake | Worn or hardened brake pad | Replace.
Defective parking brake actuator | Replace.