Diagnostic Instructions

Special Service Tool(s):

SPECIAL TOOL(S)

The symptom chart can be used to help locate the air bag Supplemental Restraint System (SRS) 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.
2. Run the On-Demand Self Test to determine what DTCs are currently being sensed by the ECS; refer to 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)

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