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

BME090369000W03
• 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 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
  - Malfunction in wiring harness between keyless unit and 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?

  - Horns sounded intermittently (Australian specs.)
  - Hazard lights flashed

Yes
Go to Step 7.
No | (Australian specs.) Go to next step. (Except Australian specs.) Go to step 6.
2 | INSPECT HORN OPERATION DURING ON-BOARD DIAGNOSIS • Did horns sound intermittently during on-board diagnostic function operation? | Yes | Go to step 7.
No | Go to next step.
3 | INSPECT HORN CIRCUIT • Do horns sound when depressing horn switch on vehicle? | Yes | Go to step 6.
No | Inspect horn circuit.
4 | INSPECT WIRING HARNESS BETWEEN KEYLESS UNIT AND HORN RELAY FOR CONTINUITY • Turn ignition switch LOCK position. • Disconnect keyless unit connector (16-pin) or short cord connector (12-pin) and horn relay connector. • Is there continuity between keyless unit connector terminal E or short cord connector terminal E and horn relay connector? | Yes | Replace keyless unit and reprogram keyless unit ID cord, then go to step 11.
No | Repair wiring harness between keyless unit and horn relay, then go to step 11.
5 | 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.
*6 | CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN KEYLESS UNIT AND FLASHER UNIT) OR KEYLESS UNIT • Measure voltage at keyless unit connector terminal H or short cord connector terminal D during on-board diagnostic function operation.

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

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

  - If wiring harness is OK, replace keyless unit and reprogram transmitter ID code, then go to Step 11.
  - If there is wiring harness malfunction, repair wiring harness, then go to Step 11.

7 | 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 next step.
8 | 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 next step.
No | Inspect door lock linkage.
*9 | CHECK TO SEE WHETHER MALFUNCTION IS IN DOOR LOCK ACTUATOR, DOOR LOCK TIMER UNIT GROUND CIRCUIT OR ELSEWHERE • Measure voltage at keyless unit connector terminal O or short cord connector 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 voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
No | • Inspect door lock timer unit connector. • Inspect wiring harness between keyless unit and door lock timer unit.

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

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

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

Yes
Replace keyless unit and reprogram transmitter ID code, then go to next step.
No | Replace door lock timer unit, then go to next step.
11 | 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.