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 NO.1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE [KEYLESS ENTRY SYSTEM]

NO.1 ONE OR MORE ON-BOARD DIAGNOSTIC FUNCTIONS INOPERATIVE [KEYLESS ENTRY SYSTEM]

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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.

1

One or more on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in door lock linkage system

POSSIBLE CAUSE

• Malfunction in door lock linkage
• Malfunction in BCM door lock/unlock signal circuit
- BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

CHECK HORN, AND HAZARD WARNING LIGHT OPERATION DURING ON-BOARD DIAGNOSIS

• Did all of the following items work during on-board diagnostic function operation?
- Hazard warning lights flashed
Yes
Go to Step 5.
No
Go to next step.
2

INSPECT HAZARD WARNING LIGHT OPERATION DURING ON-BOARD DIAGNOSIS

• Did hazard warning lights flash during on-board diagnostic function operation?
Yes
Go to Step 5.
No
Go to next step.
3

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.
*4

INSPECT IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN BCM AND TURN LIGHTS) OR BCM

• Measure the voltage at BCM terminals 3B and 3D (12-pin connector), and 2I and 2K (16-pin connector), and 8H and 8J (16-pin connector) during on-board diagnostic function operation.
- When hazard warning light flashed: Alternates between B+ and below 1.0 V
• Are the voltage as above?
Yes
Recheck malfunction symptoms, then repeat from Step 1 if malfunction reoccurs.
No
• Inspect wiring harness between BCM and turn lights.
- If wiring harness is normal, replace the BCM, then go to Step 8.
- If wiring harness malfunction, repair wiring harness, then go to Step 8.
5

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.
6

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.
*7

INSPECT IF MALFUNCTION IS IN DOOR LOCK ACTUATOR, BCM GROUND CIRCUIT OR ELSEWHERE

• Measure the voltage at BCM terminals 6A, 6B and 6F.
- All doors locked: 1.0 V or less → B+ → 1.0 V or less
(Normal lock: 6A terminal)
(Double lock: 6G terminal)
- Driver-side door unlocked: 1.0 V or less → B+ → 1.0 V or less
(Normal unlock: 6B terminal)
• Is the voltage as above?
Yes
Reinspect the malfunction symptoms, then repeat from Step 1 if the malfunction recurs.
No
• Inspect the BCM connector.
• Inspect the wiring harness between the BCM 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.
8

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 malfunction recurs.