Retrieving Codes
NOTE:
Before starting tests, ensure engine is in good mechanical condition and adjusted to specifications.
NOTE:
For wiring diagrams, refer to WIRING DIAGRAMS
article in this section. For vacuum diagrams, see VACUUM DIAGRAMS
article in this section.
MIL may come on indicating a hard or intermittent failure. Locate 2-pin self-diagnostic connector behind glove box. See Fig 1 . Connect diagnostic connector terminals using jumper wire. Turn ignition on. Observe MIL. Light indicates a system trouble code by number of blinks.
Single-digit trouble codes (1-9) are indicated by individual short blinks. Double-digit trouble codes (10-59) are indicated by a series of long and short blinks: number of long blinks equal first digit; number of short blinks equal second digit. See TROUBLE CODE IDENTIFICATION in this article. If codes other than those listed are indicated, substitute a known good ECM and recheck.