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NO.2 ALL ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

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• 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.

2 | All on-board diagnostic functions inoperative
DESCRIPTION | • Malfunction in BCM power supply circuit, door latch switch circuit, BCM ground circuit, or keyless receiver.
POSSIBLE CAUSE | • Malfunction in IG1 or power supply signal circuit of BCM - BCM power supply fuse malfunction - Malfunction in wiring harness between BCM power supply fuses and BCM • Malfunction in door open/closed signal circuit of BCM - Door latch switch system malfunction - BCM malfunction - Malfunction in wiring harness between BCM and door latch switch • Malfunction in BCM GND signal circuit - Malfunction in wiring harness between BCM and ground • Malfunction in keyless receiver - Keyless receiver malfunction - Malfunction in wiring harness between keyless receiver and BCM

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BCM POWER SUPPLY FUSES • Are the BCM power supply fuses normal? | Yes | Go to the next step.
No | Install an appropriate amperage fuse.
2 | INSPECT DOOR LATCH SWITCH INSTALLATION • Are the door latch switches installed securely? | Yes | Go to the next step.
No | Install the door latch 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 BCM) OR ELSEWHERE • Turn the ignition switch to the ON position. • Measure the voltage at the following BCM terminals: - IG1 signal (terminal 4O, 3I, 7U) - Power supply signal (terminal 3J, 3G, 3E, 4D, 4P, 8K) • Is the voltage B+? | Yes | Go to the next step.
No | Repair the wiring harness between the fuse block and BCM, then go to Step 13.
*4 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (SHORT TO POWER SUPPLY BETWEEN FUSE BLOCK AND BCM, OR BETWEEN BCM AND GROUND) OR ELSEWHERE • Turn the ignition switch to the LOCK position. • Disconnect the BCM connector. • Measure the voltage at the following BCM terminal (wiring harness-side): - IG1 signal (terminal 4O, 3I, 7U) • 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 BCM AND GROUND) OR ELSEWHERE • Is there continuity between BCM terminal 7A, 8A and ground? | Yes | Go to the next step.
No | Repair the wiring harness between the BCM and ground, then go to Step 13.
6 | INSPECT FOR CHECK CODE 04 IN INSTRUMENT CLUSTER • Inspect the door latch 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 latch switch system using the DTC 04 inspection procedure, then go to Step 13.
7 | INSPECT BCM OR WIRING HARNESS (BETWEEN BCM AND DOOR LATCH SWITCHES FOR CONTINUITY) • Open all doors. • Is there continuity between BCM terminals 1F, 7B, 7D, 7F and ground? | Yes | Replace the BCM and reprogram the transmitter ID code, then go to the next step.
No | Repair the wiring harness between the BCM and door latch switches, 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 | 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 A) • 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 terminal E 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 BCM) OR ELSEWHERE • Turn the ignition switch to the ON position. • Disconnect the keyless receiver connector and BCM connector. • Is there continuity between the following terminals? - 7I (BCM connector)-C (keyless receiver connector) | Yes | Go to the next step.
No | Repair the wiring harness between the keyless receiver and BCM, then go to Step 13.
12 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (NO CONTINUITY BETWEEN KEYLESS RECEIVER AND BCM) OR BCM • Measure the voltage at keyless receiver terminal C. - When transmitter operated: • Any transmitter button is operated : 0.5 V • Any transmitter button is not operated : 3.5 V • Is the voltage normal? | Yes | Replace the BCM, 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.