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NO.1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE

BHE090369000W04

• 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.

1 | One or more on-board diagnostic functions inoperative
DESCRIPTION | • Malfunction in trunk lid opener system, hazard warning light system, or door lock linkage system
POSSIBLE CAUSE | • Malfunction in trunk lid opener system – Trunk lid opener relay circuit malfunction – Keyless unit malfunction • Malfunction in hazard warning light system – Hazard warning light circuit – Keyless unit malfunction – Malfunction in wiring harness between keyless unit and hazard warning lights – Malfunction in wiring harness between keyless unit and flasher unit • Malfunction in door lock linkage • Malfunction in keyless unit door lock/unlock signal circuit – Keyless unit malfunction

## Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT HAZARD WARNING LIGHT AND TRUNK LID OPENER OPERATION DURING ON-BOARD DIAGNOSIS • Do all of the following items work during on-board diagnostic function operation? – Hazard warning lights flash. – Trunk lid opens. | Yes | Go to Step 8.
No | Go to the next step.
2 | INSPECT HAZARD WARNING LIGHT OPERATION DURING ON-BOARD DIAGNOSIS • Do the hazard warning lights flash during on-board diagnostic function operation? | Yes | Go to Step 5.
No | Go to the next step.
3 | INSPECT HAZARD WARNING LIGHT CIRCUIT • Do the hazard warning lights flash when hazard warning switch is on? | Yes | Go to the next step.
No | Inspect the hazard warning light circuit.
*4 | INSPECT IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN KEYLESS UNIT AND FLASHER UNIT) OR KEYLESS UNIT • Measure the voltage at keyless unit connector terminal 2I during on-board diagnostic function operation. – When hazard warning lights flashed: Alternates between B+ and below 1.0 V • Is the voltage as above? | Yes | Reinspect the malfunction symptoms, then repeat from Step 1 if malfunction recurs.
No | • Inspect the wiring harness between the keyless unit and flasher unit. – If the wiring harness is normal, replace the keyless unit and reprogram the transmitter ID code, then go to Step 11. – If the wiring harness is malfunctioning, repair the wiring harness, then go to Step 11.
5 | CHECK TRUNK LID OPERATION DURING ON-BOARD DIAGNOSIS • Does the trunk lid open during on-board diagnostic function operation? | Yes | Go to Step 8.
No | Go to the next step.
6 | INSPECT TRUNK LID OPENER SYSTEM • Does the trunk lid open by the trunk lid opener switch? | Yes | Go to the next step.
No | Inspect the trunk lid opener system.
*7 | INSPECT IF MALFUNCTION IS IN TRUNK LID OPENER RELAY CIRCUIT OR KEYLESS UNIT • Disconnect the keyless unit connector. • Measure the voltage at keyless unit connector terminal 2E. • Is the voltage approx. 12 V? | Yes | Replace the keyless unit and the reprogram transmitter ID code, then go to Step 11.
No | Inspect the trunk lid opener relay circuit.
8 | VERIFY THAT ALL DOORS LOCK AND UNLOCK DURING ON-BOARD DIAGNOSIS • Do all doors unlock and lock during on-board diagnostic function operation? | Yes | Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.
No | Go to the next step.
9 | INSPECT DOOR LOCK LINKAGE • Operate the door lock knob and verify the door locks and unlocks manually. • Does every door lock system work? | Yes | Go to the next step.
No | Inspect the door lock linkage.
*10 | INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, KEYLESS UNIT GROUND CIRCUIT OR ELSEWHERE • Measure the voltage at keyless unit connector terminals 1C and 1D. – All doors locked: Cycles 1.0 V or less →B+→1.0 V or less (terminal 1D) – All doors unlocked: Cycles B+→1.0 V or less→B+ (terminal 1C) • Is the voltage as above? | Yes | Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.
No | • Inspect the keyless unit the connector. • Inspect the wiring harness between the keyless unit and door lock actuator. – If the above parts are normal, go to the next step. – If any of above parts are malfunctioning, repair the malfunctioning part.
11 | REINSPECT MALFUNCTION SYMPTOM AFTER REPAIR • Does the keyless entry system operate properly? | Yes | Troubleshooting completed. Explain repairs to customer.
No | Reinspect the malfunction symptoms, then repeat from Step 1 if malfunction recurs.