Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the turn signal, cornering, and hazard lamps.
2. Visually inspect for obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Mechanical
^ Damaged REM

Electrical
^ Blown battery junction box:
- Fuse 22 (15 A)
- Fuse 23 (15 A)
^ Blown central junction box:
- Fuse 12 (15 A)
- Fuse 13 (15 A)
^ Damaged wiring harness
^ Loose or corroded connections
^ Damaged bulbs

3. If the concern remains after the inspection, connect the New Generation STAR (NGS) Tester to the data link connector located beneath the instrument panel and select the vehicle to be tested from the NGS Tester menu. If the NGS Tester 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 NGS Tester still does not communicate with the vehicle, refer to the New Generation STAR (NGS) Tester manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the NGS Tester responds with:
^ CKT 914, CKT 915 or CKT 70 =ALLECUS NO RESP/NOT EQUIP, refer to Information Bus.
^ NO RESP/NOT EQUIP for REM, go to Pinpoint Test B. B No Communication With the Rear Electronic Module
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the REM.

6. If the DTCs retrieved are related to the concern, go to REM DTC Index, REM Diagnostic Trouble Code Index
or SSP Relay Index to continue diagnostics. SSP Relay Index
7. If no DTCs related t6 the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures