Body Diagnostic Procedures: Introduction: Notes

The procedures contained in this manual include all the specifications, instructions, and graphics needed to diagnose 2004 LH body system problems  involving navigation and satellite radios. The diagnostics in this manual are based on the failure, condition or symptom being present at the time of diagnosis.

Please follow the recommendations below when choosing your diagnostic path.

1. First make sure the DRBIII® is communicating with the appropriate module; i.e., if the DRBIII® shows a "no response" or "Bus +/- Signal Open" condition, you must diagnose that first.
2. Read DTC's (diagnostic trouble codes) with the DRBIII®.
3. If no DTC's are present, identify the customer complaint.
4. Once the DTC or customer complaint is identified, locate the matching test in DIAGNOSTIC INFORMATION AND PROCEDURES  and begin to diagnose the symptom.

All electrical component location views are in ELECTRICAL COMPONENT LOCATOR .

All connector pinouts are in CONNECTOR PINOUTS .

All schematics are in SYSTEM WIRING DIAGRAMS , SYSTEM WIRING DIAGRAMS and SYSTEM WIRING DIAGRAMS .

An * placed before the symptom description indicates a customer complaint.

When repairs are required, refer to the appropriate article for the proper removal and installation procedure. .

Diagnostic procedures change every year. New diagnostic systems may be added: carry over systems may be enhanced. READ THIS SERVICE INFORMATION BEFORE TRYING TO DIAGNOSE A VEHICLE DIAGNOSTIC TROUBLE CODE. It is recommended that you review the entire article to become familiar with all the new and changed diagnostic procedures.