NO. 2 ALL 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.

2

All on-board diagnostic functions inoperative

DESCRIPTION

• Malfunction in door lock timer unit power supply circuit, door switch circuit, cargo compartment light circuit or door lock timer unit ground circuit.

POSSIBLE CAUSE

• Malfunction in IG1, B+ signal circuit of door lock timer unit
- Door lock timer unit power supply fuse malfunction
- Malfunction in wiring harness between door lock timer unit power supply fuse(s) and door lock timer unit itself
• Malfunction in door lock timer unit's door open/closed signal circuit
- Door switch system malfunction
- Door lock timer unit malfunction
- Malfunction in wiring harness between door lock timer unit and door switch
• Malfunction in door lock timer unit's liftgate or trunk lid open/closed signal circuit
- Cargo compartment light switch system malfunction
- Door lock timer unit malfunction
- Malfunction in wiring harness between door lock timer unit and cargo compartment light switch
• Malfunction in door lock timer unit GND signal circuit
- Malfunction in wiring harness between door lock timer unit and ground

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DOOR LOCK TIMER UNIT POWER SUPPLY FUSES

• Are door lock timer unit power supply fuses okay?
Yes
Go to next step.
No
Check for a short to ground on blown fuse's circuit. Repair or replace as necessary.
Install appropriate amperage fuse.
2

INSPECT DOOR SWITCH INSTALLATION

• Are door switches installed securely?
Yes
Go to next step.
No
Install door switch(es) securely, then go back to Step 5 of keyless entry system preliminary inspection.
*3

CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN FUSE BLOCK AND DOOR LOCK TIMER UNIT) OR ELSEWHERE

• Turn ignition switch to ON position.
• Measure voltage at following door lock timer unit terminals:
- IG1 signal (Terminal B (24 pin))
- B+ signal (Terminal A (24 pin))
• Is voltage B+?
Yes
Go to next step.
No
Repair wiring harness between fuse block and door lock timer unit, then go to Step 8.
*4

CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN FUSE BLOCK AND DOOR LOCK TIMER UNIT, OR BETWEEN DOOR LOCK TIMER UNIT AND GROUND) OR ELSEWHERE

• Turn ignition switch to LOCK position.
• Disconnect door lock timer unit connector.
• Measure voltage at following door lock timer unit connector terminals:
- IG1 signal (Terminal B (24 pin))
• Is voltage B+?
Yes
Repair malfunctioning wiring harness, then go to Step 8.
No
Go to next step.
*5

CHECK TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (LACK OF CONTINUITY BETWEEN DOOR LOCK TIMER UNIT AND GROUND) OR ELSEWHERE

• Is there continuity between door lock timer unit connector terminal W (24 pin) and ground?
Yes
Go to next step.
No
Repair wiring harness between door lock timer unit and ground, then go to Step 8.
6

INSPECT FOR CHECK CODE 04 IN INSTRUMENT CLUSTER

• Inspect door switch using instrument cluster input/output check mode.
(See Section T)
• Does DTC 04 function properly?
Yes
Go to next step.
No
Repair door switch system using DTC 04 inspection procedure, then go to Step 8.
7

INSPECT DOOR LOCK TIMER UNIT OR WIRING HARNESS (BETWEEN DOOR LOCK TIMER UNIT AND DOOR SWITCHES, CARGO COMPARTMENT LIGHT SWITCH FOR CONTINUITY)

• Open the driver-side door.
• Is there continuity between door lock timer unit connector terminal K, G (24 pin) and ground?
Yes
Replace door lock timer unit and reprogram door lock timer unit ID code, then go to next step.
No
Repair wiring harness between door lock timer unit and door switch(es), cargo compartment light switch then go to 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 reoccurs.