Troubleshooting Hints

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS:
1. If the Powertrain Control Module (PCM) and Electronic Brake Control Module (EBCM) are not accessible with a scan tool, check for an open in CKT 800 between S221 and S207.
2. If a single component is not accessible with a scan tool, check for an open in the following:
^ Powertrain Control Module-CKT 800 between S207 and component.
^ Electronic Brake Control Module-CKT 800 between S207 and component.
^ Diagnostic Energy Reserve Module-CKT 800 between S221 and component.
3. If the wires are OK, refer to Antilock Brake System for ABS Diagnosis, and to Air Bags (Supplemental Restraint Systems) for Supplemental Air Restraint diagnosis. Antilock Brakes / Traction Control Systems Air Bag Systems
4. Check that all connectors in system are mated correctly.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage check (refer to "General Troubleshooting Procedures,"). Diagnostic Aids
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of their systems (refer to "General Troubleshooting Procedures,").
^ Refer to System Diagnosis. System Diagnosis