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.
- 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).
- Visually inspect for obvious signs of damage and system integrity.
Visual Inspection
MECHANICAL ELECTRICAL - Check for the installation of non-standard accessories which may affect or obstruct the function of the SRS system
- Check the condition of trim, etc at the SRS system components
- Sensor(s)
- Pretensioner(s)
- Air bag module(s)
- Occupant detection/classification sensors
- Seat position sensor
- Fuses
- Wiring harness
- Make sure all electrical connector(s) are engaged correctly on the air bag circuits
- Make sure the Restraints Control Module (RCM) is correctly installed
- Warning lamp bulb(s)
- Impact sensor(s)
- Buckle sensor(s)
- Pretensioner(s)
- Air bag module(s)
- Air bag deactivation switch
- Air bag deactivation warning lamp
- Occupant detection/classification sensors
- Seat position sensor
- Clockspring
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- Faults in SRS harnesses would normally mean replacement of the relevant harness. SRS harness repairs are not recommended
- If the cause is not visually evident check the system for any logged Diagnostic Trouble Codes (DTCs) and refer to the DTC INDEX .