Restraints System Pre-Diagnostic Procedure

RESTRAINTS SYSTEM PRE-DIAGNOSTIC PROCEDURE


Diagnostic Pre-Test

Before attempting to repair any restraint system, technicians should be familiar with and fully understand the system operation. The following should be used as a checklist to be completed in its entirety prior to referencing specific Restraints Diagnostic Procedures.

FOLLOW THE BASIC OUTLINE SET FORTH IN THE SIX-STEP TROUBLESHOOTING PROCEDURE

- Verification of complaint.
- Verification of any related symptoms.
- Symptom analysis.
- Problem isolation.
- Repair of isolated problem.
- Verification of proper operation.

TAKE INTO ACCOUNT CURRENT VEHICLE CONDITION, REPAIR HISTORY, AND TECHNICAL SERVICE BULLETINS (TSB)

- Verify there are no outward signs of vehicle damage or effects from a collision that could impact the proper operation of the Restraints system. Check for aftermarket vehicle accessories that may have been installed improperly or could interfere with the system
- Check the vehicle repair history for repairs that may relate to the current condition.
- Perform a check of current Technical Service Bulletins (TSB) for the Restraints system related to the customer concern. If a TSB applies, follow the procedure outlined in the TSB.

DIAGNOSE ONLY THOSE FAILURES THAT ARE ACTIVE AND CAN BE REPRODUCED

- Check the control module central to the subsystem that is exhibiting the condition for active DTC
- For an intermittent failure that is not active at the time of vehicle inspection, refer to the *RESTRAINTS SYSTEM INTERMITTENT TEST and document the event on the repair order. Restraints System Intermittent Test

ADDRESS ACTIVE DIAGNOSTIC TROUBLE CODES (DTC) IN THE CORRECT ORDER

- Low/High Voltage and Serial Data Loss of Communication Codes
- Module Internal Failure and Configuration Mismatch Codes
- Circuit specific DTC failures

Should the malfunction still be present after conducting this Pre-diagnostic Procedure, technicians should continue to the appropriate DTC procedure or symptom diagnostic.

Was the Pre-Test reviewed and is the DTC still present?

Yes


- Diagnose and repair the DTC(s).

No


- Test Complete.