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 or fault tree 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 key is turned off. If the DTC is unknown, instruct the customer on how to count a code. Demonstrate a DTC by disconnecting an air bag sensor, turn the key to the ON position, and allow the customer to count the DTC. Reconnect the air bag sensor and instruct the customer to return when the code is known. Once the code is known, read the "Normal Operation" section of the applicable Pinpoint Test 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. The section "Possible Causes" of the applicable Pinpoint Test lists the common concerns that relate to each DTC. Concerns are listed in the order that they are most likely to occur.