Body Diagnostic Procedures: Introduction: Notes

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

Please follow the recommendations below when choosing your diagnostic path.

1. First make sure the DRBIII® is communicating with the appropriate modules; i.e., if the DRBIII® displays 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 component location views are in COMPONENT LOCATIONS . All connector pinouts are in section CONNECTOR PINOUTS . All schematics are in section SCHEMATIC 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 repair procedure.

Diagnostic procedures change every year. New diagnostic systems may be added; carryover 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 material to become familiar with all new and changed diagnostic procedures.