Diagnosing Customer Concerns w/out Hard Fault Codes

If a fault 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 when the air bag warning indicator is not flashing will result in needless replacement of the air bag system components and repeat service.

Once the code is known, study the circuit diagram and determine the location of components that are involved in creating that diagnostic trouble code. 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.