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NO.2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

BHE090369000W05

• When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, verify that the connectors, terminals and wiring harnesses are connected correctly and undamaged.

• The door switches include the rear door upper latch switches and rear door lower latch switches.

2 | All on-board diagnostic functions inoperative
DESCRIPTION | • Malfunction in keyless unit power supply circuit, door switch circuit, trunk lid compartment light circuit, keyless unit ground circuit, or keyless receiver.
POSSIBLE CAUSE | • Malfunction in IG1 or B+ signal circuit of keyless unit – Keyless unit power supply fuse malfunction – Malfunction in wiring harness between keyless unit power supply fuses and keyless unit • Malfunction in door open/closed signal circuit of keyless unit – Door switch system malfunction – Keyless unit malfunction – Malfunction in wiring harness between keyless unit and door switch • Malfunction in trunk lid open signal circuit of keyless unit – Trunk lid compartment light switch system malfunction – Keyless unit malfunction – Malfunction in wiring harness between keyless unit and trunk lid compartment light switch • Malfunction in keyless unit GND signal circuit – Malfunction in wiring harness between keyless unit and ground • Malfunction in keyless receiver – Keyless receiver malfunction – Malfunction in wiring harness between keyless unit and keyless receiver

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT KEYLESS UNIT POWER SUPPLY FUSES • Are the keyless unit power supply fuses normal? | Yes | Go to the next step.
No | Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary. Install an appropriate amperage fuse.
2 | INSPECT DOOR SWITCH INSTALLATION • Are the door switches installed securely? | Yes | Go to the next step.
No | Install the door switches securely, then go back to Step 5 of KEYLESS ENTRY SYSTEM PRELIMINARY INSPECTION.
*3 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS UNIT) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following keyless unit terminals: – IG1 signal (terminal 2B) – B+ signal (terminal 2A) • Is the voltage B+? | Yes | Go to the next step.
No | Repair the wiring harness between the fuse block and keyless unit, then go to Step 13.
*4 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FUSE BLOCK AND KEYLESS UNIT, OR BETWEEN KEYLESS UNIT AND GROUND) OR ELSEWHERE • Turn the ignition switch to the LOCK position. • Disconnect the keyless unit connector. • Measure the voltage at the following keyless unit connector terminal: – IG1 signal (terminal 2B) • Is the voltage B+? | Yes | Repair the malfunctioning wiring harness, then go to Step 13.
No | Go to the next step.
*5 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS UNIT AND GROUND) OR ELSEWHERE • Is there continuity between keyless unit connector terminal 2W and ground? | Yes | Go to the next step.
No | Repair the wiring harness between the keyless unit and ground, then go to Step 13.
6 | INSPECT FOR CHECK CODE 04 IN INSTRUMENT CLUSTER • Inspect the door switch using the instrument cluster input/output check mode. (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.) • Is DTC 04 displayed? | Yes | Go to the next step.
No | Repair the door switch system using the DTC 04 inspection procedure, then go to Step 13.
7 | INSPECT KEYLESS UNIT OR WIRING HARNESS (BETWEEN KEYLESS UNIT AND DOOR SWITCHES, TRUNK LID COMPARTMENT LIGHT SWITCH FOR CONTINUITY) • Open the driver-side door. • Is there continuity between keyless unit connector terminal 2K, 2G and ground? | Yes | Replace the keyless unit and reprogram the keyless unit ID code, then go to the next step.
No | Repair the wiring harness between the keyless unit, door switches, and trunk lid compartment light switch, then go to the next step.
8 | INSPECT POWER SUPPLY FUSE • Is the keyless receiver power supply fuse normal? | Yes | Go to the next step.
No | Inspect for a short to ground in circuit of blown fuse. Repair or replace if necessary. Install an appropriate amperage fuse.
9 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN FUSE BLOCK AND KEYLESS RECEIVER) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following keyless receiver terminal: – IG1 signal (terminal 1A) • Is the voltage B+? | Yes | Go to the next step.
No | Repair the wiring harness between the fuse block and keyless receiver, then go to Step 13.
10 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND GROUND) OR ELSEWHERE • Is there continuity between keyless receiver connector terminal 1E and ground? | Yes | Go to the next step.
No | Repair the wiring harness between the keyless receiver and ground, then go to Step 13.
11 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND KEYLESS UNIT) OR ELSEWHERE • Turn the ignition switch to the ON position. • Disconnect the keyless receiver connector and keyless unit. • Is there continuity between the following terminals? – Terminal 1B-terminal 2N – Terminal 1C-terminal 2P | Yes | Go to the next step.
No | Repair the wiring harness between the keyless receiver and keyless unit, then go to Step 13.
12 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND KEYLESS UNIT) OR KEYLESS UNIT • Measure the voltage at keyless unit terminal 2N. – When transmitter operated: • Any transmitter button is operated without key in steering lock (key reminder switch off): 5 V→1.0 V or less • Key is in steering lock (key reminder switch on):5 V • Is the voltage normal? | Yes | Replace the keyless unit, then go to the next step.
No | Replace the keyless receiver, then go to the next step.
13 | REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR • Does the keyless entry system operate properly? | Yes | Troubleshooting completed. Explain repairs to the customer.
No | Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.