Clearing Trouble Codes

DIAGNOSTIC TROUBLE CODES
A Diagnostic Trouble Code (DTC) indicates the PCM has recognized an abnormal condition in the system.

The technician can display DTC's in two ways. The first way is to cycle the ignition switch and count the number of times the malfunction indicator (Check Engine) lamp on the instrument panel flashes on and off. The DRB scan tool provides the second method of displaying DTC's. Diagnostic trouble codes are the results of a system or circuit failure, but do not directly identify the failed component or components.

OBTAINING DIAGNOSTIC TROUBLE CODES USING DRB SCAN TOOL

WARNING: Apply parking brake and/or block wheels before performing any test on an operating engine.

Fig. 1 DLC Connector Location:

1. Connect the DRB scan tool to the data link (diagnostic) connector. This is located in the passengers compartment, below instrument cluster, and to the left of steering column (Fig. 1).
2. Turn the ignition switch on, access Read Fault Screen. Record all the DTC's shown on the DRB scan tool. Observe the malfunction indicator (check engine) lamp on the instrument panel. The lamp should light for 2 seconds then go out (bulb check).

DTC Descriptions Part 1 Of 5:

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3. To erase DTC's, use the Erase Trouble Code data screen on the DRB scan tool.