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

BME090369000203
• When performing an asterisked (*) troubleshooting inspection, 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, 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 (except vehicle with theft-deterrent system), horn system (Australian specs.), door lock linkage system, or driver's door key cylinder switch system.
POSSIBLE CAUSE | • Malfunction in horn system (Australian specs.)

  - Horn circuit malfunction
  - Keyless control unit malfunction
  - Malfunction in wiring harness between keyless control unit and horn relay

• Malfunction in hazard warning light system (except vehicle with theft-deterrent system)

  - Hazard warning light circuit
  - Keyless unit malfunction
  - Malfunction in the wiring harness between the keyless unit and the flasher unit

• Malfunction in the door lock linkage
• Malfunction in keyless unit door lock/unlock signal circuit

  - Keyless unit malfunction
  - Malfunction in the wiring harness between the keyless unit and the door lock timer unit

## Diagnostic procedure

  Note

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

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT HORN AND HAZARD WARNING LIGHT OPERATION DURING ON-BOARD DIAGNOSIS • Did all of the following items work during on-board diagnostic function operation?

  - Hazard lights flashed

Yes
Go to Step 4.
No | Go to the next step.
2 | INSPECT HAZARD WARNING LIGHT CIRCUIT • Do the hazard warning lights flash when the hazard warning switch is on? | Yes | Go to the next step.
No | Inspect hazard warning light circuit.
*3 | CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN KEYLESS UNIT AND FLASHER UNIT) OR KEYLESS UNIT • Measure the voltage at keyless unit terminal H or short cord terminal D during on-board diagnostic function operation.

  - When the hazard warning light flashes: Alternates between B+ and below 1.0 V

• Is the voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
No | • Inspect the wiring harness between the keyless unit and the flasher unit.

  - If the wiring harness is OK, replace the keyless unit and reprogram transmitter ID code, then go to Step 8.
  - If there is wiring harness malfunction, repair the wiring harness, then go to Step 8.

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 recurs.
No | Go to the next step.
5 | INSPECT DOOR LOCK LINKAGE • Operate inner door lock knob and make sure door locks and unlocks manually. • Does every door lock system work? | Yes | Go to the next step.
No | Inspect the door lock linkage.
*6 | CHECK TO SEE WHETHER MALFUNCTION IS IN DOOR LOCK ACTUATOR, DOOR LOCK TIMER UNIT GROUND CIRCUIT OR ELSEWHERE • Measure the voltage at keyless unit terminal O or short cord terminal F during on-board diagnostic function operation.

  - With double locking system or theft-deterrent system

  • All door locked: 5→2.5→5 V
  • All door unlocked: 5→below 1.0 V→5 V

  - Other

  • All door locked: B+→6 V→B+
  • All door unlocked: B+→below 1.0 V→B+

• Is the voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
No | • Inspect the door lock timer unit connector. • Inspect the wiring harness between the keyless unit and the door lock timer unit.

  - If above parts are OK, go to the next step.
  - If above parts malfunction, repair malfunctioning part.

*7 | CHECK TO SEE WHETHER MALFUNCTION IS IN KEYLESS UNIT OR DOOR LOCK TIMER UNIT • Measure the voltage at door lock timer unit terminal F. • Is voltage as follows?

  - With double locking system or theft-deterrent system: 5 V
  - Other: B+

Yes
Replace the keyless unit and reprogram transmitter ID code, then go to the next step.
No | Replace the door lock timer unit, then go to the next step.
8 | 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 recurs.