Diagnosing Customer Concerns w/out Hard Fault Codes

WHEN NO DTC's ARE AVAILABLE, FOLLOWING THESE INSTRUCTIONS MAY PREVENT NEEDLES REPLACEMENT OF AIR BAG SYSTEM COMPONENTS.
If a diagnostic trouble code 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 diagnostic trouble code after the ignition switch is turned off.

INVOLVING THE CUSTOMER WITH THE DIAGNOSIS MAY BE USEFUL
If the diagnostic trouble code is unknown, instruct the customer how to count a code. Demonstrate a diagnostic trouble code by disconnecting center cowl primary crash front air bag sensor and bracket or center radiator primary crash front air bag sensor and bracket, turn the ignition switch to RUN, and allow customer to count diagnostic trouble code. Reconnect center cowl primary crash front air bag sensor and bracket or center radiator primary crash front air bag sensor and bracket and instruct customer to return when the code is known.

ONCE THE CUSTOMER RETURNS THE VEHICLE WITH A DTC
Once the code is known, read the "Normal Operation" description for the diagnostic trouble code involved. 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. "Possible Causes" lists the common concerns that relate to each diagnostic trouble code. Concerns are listed in the order in which they are most likely to occur.