Retrieving Codes

Locate ECU under carpet on passenger's footwell, and check for trouble codes. Connect jumper wire to diagnostic connector (Black and White wires). Turn ignition on. Observe CHECK ENGINE light. Light indicates a system failure code by number of blinks.

CHECK ENGINE light indicates component problems with a blinking series of codes. Trouble codes 1-9 are indicated by individual short blinks. Codes 10-59 are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add long and short blinks together to determine trouble code.

If codes other than those listed are indicated, substitute a known good ECU, and recheck. If codes do not reappear, replace ECU. CHECK ENGINE light may come on indicating a system problem due to a poor or intermittent connection. Check all related connections, and repair as necessary. Whenever CHECK ENGINE light comes on and stays on steadily, see CHECK ENGINE LIGHT STAYS ON under, CODE 0: NO CODES in this article .

NOTE: Before starting tests, ensure engine is in good mechanical condition and adjusted to specifications.