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

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

1

One or more on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in hazard warning light system, or door lock linkage system, driver's door key cylinder switch system.

POSSIBLE CAUSE

• Malfunction in hazard warning light system
- Hazard warning light circuit
- Door lock timer unit malfunction
- Malfunction in wiring harness between door lock timer unit and flasher unit
• Malfunction in door lock linkage
• Malfunction in door lock timer unit door lock/unlock signal circuit
- Door lock timer unit malfunction

Diagnostic procedure

Note
• For with theft-deterrent system, follow the procedure from Step 4.

STEP

INSPECTION

ACTION

1

INSPECT HAZARD WARNING LIGHT OPERATION DURING ON-BOARD DIAGNOSIS

• Did hazard warning lights flash during on-board diagnostic function operation?
Yes
Go to Step 4.
No
Go to next step.
2

INSPECT HAZARD WARNING LIGHT CIRCUIT

• Do hazard warning lights flash when hazard warning switch is on?
Yes
Go to next step.
No
Inspect hazard warning light circuit.
*3

CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN DOOR LOCK TIMER UNIT AND FLASHER UNIT) OR DOOR LOCK TIMER UNIT

• Measure voltage at door lock timer unit connector terminal I (24 pin) during on-board diagnostic function operation.
- When hazard warning light flashed: B+⇔below 1.0 V
• Is voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction reoccurs.
No
• Inspect wiring harness between door lock timer unit and flasher unit.
- If wiring harness is OK, replace door lock timer unit and reprogram transmitter ID code, then go to Step 7.
- If wiring harness malfunction, repair wiring harness, then go to Step 7.
4

MAKE SURE THAT ALL DOORS LOCK AND UNLOCK DURING ON-BOARD DIAGNOSIS

• Did all doors unlock and lock during on-board diagnostic function operation?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction reoccurs.
No
Go to next step.
5

INSPECT DOOR LOCK LINKAGE

• Operate door lock knob and make sure door locks and unlocks manually.
• Does every door lock system work?
Yes
Go to next step.
No
Inspect door lock linkage.
*6

CHECK TO SEE WHETHER MALFUNCTION IS IN DOOR LOCK ACTUATOR, DOOR LOCK TIMER UNIT GROUND CIRCUIT OR ELSEWHERE

• Measure voltage at door lock timer unit connector terminal C, D (6 pin) during on-board diagnostic function operation.
- All door locked: below 1.0 V→B+→below 1.0 V (terminal D, 6 pin)
- All door unlocked: B+→below 1.0 V→B+ (terminal C, 6 pin)
• Is voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction reoccurs.
No
• Inspect door lock timer unit connector.
• Inspect wiring harness between door lock timer unit and door lock actuator.
- If above parts are OK, go to next step.
- If above parts malfunction, repair malfunction part.
7

RECHECK MALFUNCTION SYMPTOM AFTER REPAIR

• Does keyless entry system operate properly?
Yes
Troubleshooting completed.
Explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction reoccurs.