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Airbags and Restraint System 3B-18
Maintenance of Airbags Maintenance Procedures for Airbags The fault indicator lamp does not come on
Is any fault record read out by the diagnostic Yes: go to the step 3 No: go to the step 2 After the front passenger airbag indicator lamp Yes: check the diagnostic interface and the No: replace the airbag controller. Deal with the fault according to the following fault If the fault indicator lamp is always on, is there any Yes: go to the step 2. No: go to the step 3. Read out the fault cause and deal with the fault Check whether the airbag fuse and relevant power Check whether the airbag controller’s connector is If the fault indicator lamp flickers Read out the fault record by the airbag fault If there is ECU internal fault in the failure logging, Replace the airbag controller. If the power voltage is too low or too high from the There is a driver airbag fault (resistance low, Resistance low Unplug the driver airbag module to check whether Yes: replace the driver airbag module. No: go to the step (2). (2) Remove the connector with the yellow harness in the middle below the clock spring Yes: replace the clock spring. No: go to the step (3). (3) Replace the airbag controller to check whether the fault disappears. (4) Check the harness for any short circuit and pay attention to the short circuit ring in the 2) Resistance high Check whether the connectors between the driver Check whether the resistance between the upper Yes: go to the step (2) No: replace the clock spring. Replace the driver airbag module to check whether Replace the airbag controller to check whether the 3) Short to ground or short to power supply Replace the clock spring to check whether the fault Replace the driver airbag module to check Replace the airbag controller to check whether the Check the harness for any short circuit. There is a front passenger airbag fault (resistance Resistance low Unplug the front passenger airbag module to check Yes: Replace the front passenger airbag module No: go to the step (2) (2) Remove the connector with the yellow harness in the middle below the clock spring Yes: replace the clock spring No: go to the step (3) (3) Replace the airbag controller to check |