Without Scan Tool

DIAGNOSTIC TROUBLE CODES
A Diagnostic Trouble Code (DTC) indicates the Powertrain Control Module (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 THE MALFUNCTION INDICATOR LAMP (MIL)

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

1. Cycle the ignition key On - Off - On - Off - On within 5 seconds.
2. Count the number of times the MIL (check engine lamp) on the instrument panel flashes on and off. The number of flashes represents the trouble code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual two digit trouble codes.