Air Bag Systems: Testing and Inspection

Safety Information

WARNING: To avoid accidental deployment the back-up power supply must be depleted before beginning any work on the SRS system or its components. Failure to follow this instruction may result in personal injury.

WARNING: Do not use a multimeter to probe an SRS module. It is possible for the power from the meter battery to trigger the activation of the module. Failure to follow this instruction may result in personal injury.

NOTE:
It is advisable not to use a cellular phone or to have a cellular phone in close proximity when working on the SRS system or components.

NOTE:
Given the legal implications of a restraints system failure, harness repairs to Air Bag module circuits are not acceptable. Where the text refers to "REPAIR the circuit", this will normally mean the replacement of a harness.

Power supply depletion
Before beginning any work on the SRS system or related components:
1 Remove the ignition key.
2 Disconnect the battery leads, ground first.
3 Wait 2 minutes for the power circuit to discharge.
There are comprehensive instructions on the correct procedures for SRS system repairs in this product. Refer to the relevant section of this product.


Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.

NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
1 Verify the customer concern.
- Confirm the function of the warning lamp (if the warning lamp is inoperative, system faults will be signalled by an audible chime)
2 Visually inspect for obvious signs of mechanical or electrical damage.





3 If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4 If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the relevant DTC Index.

DTC Index
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to A L L Diagnostic Trouble Codes ( DTC ). For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Occupant Classification System (OCS)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Restraints Control Module (RCM)