Using Malfunction Indicator (CHECK ENGINE) Light

1. Turn ignition on. Ensure CHECK ENGINE light comes on. Depress and hold accelerator pedal at Wide Open Throttle (WOT) for 3-5 seconds.
2. After CHECK ENGINE light goes out and comes on again, release accelerator pedal. This on-off period indicates self-diagnostic system is preparing to output diagnostic codes. See Fig 1 .
3. Next CHECK ENGINE light on-off periods will represent first fault code stored. Record fault code, and again depress and hold accelerator pedal at WOT for 3-5 seconds. Release accelerator pedal, and record second fault code stored.
4. Continue to depress and release accelerator pedal until Code 1000 is displayed, indicating end of output. See Fig 1 .

Fig 1: Reading CHECK ENGINE Light Fault Code Output

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