Diagnosing Customer Concerns w/out Hard Fault Codes

If a Diagnostic Trouble Code (DTC) is reported by the customer but is not present when the vehicle comes in for service, pinpoint diagnostics cannot be used. Following the pinpoint tests diagnosis when the code is not flashing will result in needless replacement of the air bag system components and repeat service. The air bag diagnostic monitor does not contain any memory of the DTC after the ignition switch is turned OFF. If the diagnostic trouble code is unknown, instruct the customer how to count a code. Demonstrate a DTC by disconnecting RH or LH primary crash front air bag sensor and bracket, turn the ignition switch to RUN, and allow customer to count DTC. Reconnect RH or LH primary crash front air bag sensor and bracket and instruct customer to return when the code is known. Once the code is known, read the Normal Operation description within the Test Notes for the DTC involved. Study the circuit diagram and determine the location of components that are involved in creating that DTC. Do a thorough visual inspection of components, connectors, splices and wiring harnesses, looking for pinched wires, worn insulation on conductors, opens, shorts or loosely mounted sensors. Possible Causes lists the common concerns that relate to each DTC. Concerns are listed in the order in which they are most likely to occur.