Diagnostic Instructions

The Symptom Chart can be used to help locate the air bag system concerns if no Diagnostic Trouble Codes (DTCs) are retrieved and the listed symptoms are observed. Whether or not the listed symptoms are observed, always perform the following:
1. Retrieve all DTCs stored in the air bag Electronic Crash Sensor (ECS) module memory; refer to Retrieve/Clear Continuous DTCs in How to Display and Read DTCs.
2. Run the On-Demand Self Test to determine what DTCs are currently being sensed by the ECS; refer to On-Demand Self Test. On-Demand Self Test
3. If the stored DTCs are different than the current DTCs, always repair the current DTCs first.
4. If memory displays different continuous DTCs than the On-Demand Self Test, perform in the following order:
- On-Demand Self Test.
- Memory (Retrieve/Clear Continuous DTCs).

A DTC can indicate several concerns. The DTCs are to assist in system diagnosis and are not to be considered definitive. Always refer to the Pinpoint Tests corresponding to the DTC to determine where the concern lies and to repair the concern properly. Pinpoint Tests

The SRS diagnostics can be divided into three sections:
- diagnostic test modes.
- PID/data monitor and record.
- active command modes.

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