Flow of Diagnosis

1. Verify the customer concern by operating the electronic door lock control system to duplicate the concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION CHART

Mechanical
- Binding latch or lock mechanisms
- Keypad membrane
- Remote transmitter(s)

Electrical
- Fuse junction panel fuse 5 (10 A), 41 (10 A)
- Power distribution box fuse 5 (30 A)
- Loose connectors
- Corroded connectors
- Exposed or cut wires

3. If the concern remains after the inspection, connect the 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 the NGS does not communicate with the vehicle:
- check that the program card is properly installed.
- check the connections to the vehicle.
- check the ignition switch position.

4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.

5. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, diagnose Multiplex Communication Network concern.
- NO RESP/NOT EQUIP for DDM, go to Pinpoint Test A. A: No Communication With the Driver Door Module

- NO RESP/NOT EQUIP for SCIL, go to Pinpoint Test B. B: No Communication With The Module - (SCIL)

- SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self-test diagnostics for the SCIL module and the DDM.

6. If the DTCs retrieved are related to the concern, go to the DDM or the SCIL Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.

7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures