Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Electrical
^ Wiring harness
^ Loose or corroded connections
^ Battery Junction Box (BJB) Fuses:
- 404 (10 A)
- 405 (10 A)
- 422 (20 A)
- 425 (40 A)
- 423 (30 A)
- 424 (30 A)
- 430 (30 A)
- 431 (30 A)
^ Central Junction Box (CJB) Fuses:
- 207 (5 A)
- 220 (10 A)
- 222 (10 A)
- 235 (5 A)
^ lamp(s)
^ Relay(s)
^ Headlamp switch
^ Instrument cluster
^ Dimmer switch
^ FEM
^ REM
^ DDM

3. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
^ Check that the program card is correctly installed.
^ Check the connections to the vehicle.
^ Check the ignition switch position.


4. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the DATA LINK DIAGNOSTICS TEST. Pinpoint Test PC (Precheck)
If the diagnostic tool responds with:
^ CKT914, CKT915 or CKT70 ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for FEM, go to Pinpoint Test A. Test A: No Communication With The Front Electronic Module
^ NO RESP/NOT EQUIP for REM, go to Pinpoint Test B. Test B: No Communication With The Rear Electronic Module
^ NO RESP/NOT EQUIP for DDM, go to Pinpoint Test C. Test C: No Communication With the Driver Door Module
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the FEM.
6. If the DTCs retrieved are related to the concern, go to FEM Diagnostic Trouble Code (DTC) Index FEM Diagnostic Trouble Code (DTC) Index
or REM Diagnostic Trouble Code (DTC) Index. REM 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