Initial Inspection and Diagnostic Overview

Inspection and Verification - Headlamps (With Autolamps)

1. Verify the customer's concern by operating the headlamps (with autolamps) to duplicate the condition.

Visual Inspection Chart:

2. Inspect to determine if one of the mechanical or electrical concerns from the inspection chart apply.

3. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.

4. If a concern remains after the inspection, use Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent connected to the data link connector (DLC) to retrieve continuous diagnostic trouble codes (DTCs) and to execute Self Test Diagnostics for the Lighting Control Module. If, after performing data link diagnostic test, the New Generation Star (NGS) Tester responds with NO RESPONSE/NOT EQUIPPED, go to Pinpoint Test AA. AA - No Communication With Lighting Control Module

5. If self test is passed and no diagnostic trouble codes (DTCs) are retrieved, go to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures

6. If diagnostic trouble codes (DTCs) are retrieved, go to the Lighting Control Module (LCM) Diagnostic Trouble Codes (DTCs) Index to continue diagnostics. Lighting Control Module (LCM) DTC Index

7. If the lighting control module cannot be accessed by the New Generation Star (NGS) Tester, go to Pinpoint Test AA. AA - No Communication With Lighting Control Module

The Rotunda Service Bay Diagnostic System (SBDS) may also be used to diagnose this system.