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 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 control module malfunction
•  Malfunction in hazard warning light system
―  Hazard warning light circuit
―  Keyless control module malfunction
―  Malfunction in wiring harness between keyless control module and hazard warning lights
―  Malfunction in wiring harness between keyless control module and flasher unit
•  Malfunction in door lock linkage
•  Malfunction in keyless control module door lock/unlock signal circuit
―  keyless control module 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 CONTROL MODULE AND FLASHER UNIT) OR KEYLESS CONTROL MODULE
•  Measure the voltage at keyless control module 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 control module and flasher unit.
―  If the wiring harness is normal, replace the keyless control module 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 CONTROL MODULE
•  Disconnect the keyless control module connector.
•  Measure the voltage at keyless control module connector terminal 2E.
•  Is the voltage approx. 12 V?
Yes
Replace the keyless control module 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 CONTROL MODULE GROUND CIRCUIT OR ELSEWHERE
•  Measure the voltage at keyless control module 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 lessB+ (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 control module the connector.
•  Inspect the wiring harness between the keyless control module 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.