Inspection and Verification (Start Testing Here)

NOTE: Before starting electrical diagnosis, check for mechanical binds by manually operating the door locks. Operate lock system several times from each switch while observing the operation of all door locks. Be sure battery is fully charged.

1. Verify the customer concern by operating the electronic door lock system to duplicate conditions.
2. Visually inspect for obvious signs of mechanical and electrical damage. Refer to the following chart:

VISUAL INSPECTION CHART

Mechanical
^ Binding latches

Electrical
^ Battery Junction Box (BJB) Fuses:
- Circuit Breaker 7 (20 A)
- Circuit Breaker 12 (18 A)
- Circuit Breaker 14 (20 A)
^ Central Junction Box (CJB)
- 4 (15 A)
- 6 (15 A)
- 8 (15 A)
- 13 (15 A)
^ Keyless entry keypad switch
^ Power door lock actuator
^ Luggage compartment release switch
^ Luggage compartment release solenoid
^ Connectors or corroded connections
^ Wiring harness

3. If the concern remains after the inspection, connect New Generation STAR (NGS) Tester to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If NGS Tester does not communicate with the vehicle:
1 Check that the program card is correctly installed.
2 Check the connections to the vehicle.
3. Check the ignition switch position.
4. If NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester Manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If NGS Tester responds with:
1 CKT914, CKT915 or CKT7O = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
2 NO RESP/NOT EQUIP for the DDM, go to Pinpoint Test A. A: No Communication With the Driver Door Module
3 NO RESP/NOT EQUIP for the LCM, go to Pinpoint Test B. B: No Communication With the Lighting Control Module
4 SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the DDM and LCM.
6. If the DTCs retrieved are related to the concern, go to the DDM Diagnostic Trouble Code (DTC) Index or LCM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Lighting Control Module Diagnostic Trouble Code (DTC) Index
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures