Flow of Diagnosis

The Symptom Chart can be used to help locate the service conditions if no Diagnostic Trouble Codes (DTCs) are retrieved and the listed symptoms are observed. Whether or not the listed symptoms are observed, always:
1. Retrieve all DTCs stored in the air bag Electronic Crash Sensor (ECS) module memory by executing the DIAGNOSTIC TEST MODES, RETRIEVE/CLEAR CONTINUOUS DTCs.
2. Run the ON-DEMAND SELF TEST to determine what DTCs are currently being sensed by the air bag electronic crash sensor (ECS) module.
3. If the stored DTCs are different than the current DTCs, always service the current DTCs first.
4. If different continuous DTCs are displayed from memory than ON-DEMAND SELF TEST, service in the following order:
1. ON-DEMAND SELF TEST
2. memory (RETRIEVE/CLEAR CONTINUOUS DTCs)

Please remember that a DTC may indicate several faults. The DTCs are to assist in system diagnosis and are not to be considered definitive. Always refer to the pinpoint test corresponding to the DTC to determine where the fault lies and to properly service the fault.

The air bag Supplemental Restraint System (SRS) diagnostics can be divided into three sections:
^ diagnostic test modes.
^ PID/data monitor and record.
^ active command modes.

Diagnostic Test Modes
The following menu options are available under the diagnostic test modes:
^ Retrieve/Clear DTCs.
^ On-Demand Self Test.