Reading and Clearing Diagnostic Trouble Codes

The diagnostic monitor has a coded flashing indicator lamp feature which assists in isolating system malfunctions or faults. The codes are produced by a series of air bag lamp flashes. Each flash is on for about one-half second and off for about one-half second. The number of flashes in each series is based on the type of fault being detected. The code (series of flashes) is repeated when the ignition switch is in the RUN position and a fault exists. The coded fault feature is prioritized so that if two or more different faults occur at the same time, the highest priority fault indication will be shown until corrected.

NOTE: If a system fault exists and the lamp is malfunctioning, an audible tone will be heard indicating the need for service. The tone produced is a series of five sets of five beeps. The number of beeps does not indicate the fault code; it means the lamp is out and a fault is present.

The faults and associated codes are listed in the Trouble Code Priority Chart in the order that they are ranked from top to bottom. In other words, the code at the top of the list has the highest priority (or ranking) and would be shown over any other code by the air bag lamp. The code at the bottom of the list has the lowest priority (or ranking). These listings are for information only and should not be used for system diagnosis or troubleshooting. The diagnostic charts and deactivation procedure should be used to pinpoint the specific fault and to safely diagnose and service the system. However, if after using the diagnostic charts, the fault is not located, proceed to the diagnostic schematic to perform additional diagnostic checks to determine and correct uncommon faults.