Intermittent Failures
Intermittent failures may cause MIL (CHECK ENGINE light) to flicker or illuminate and go out after intermittent fault goes away. However, corresponding trouble code will be retained in ECM memory. If related fault does not reoccur within 50 ignition cycles, related trouble code will be erased from ECM memory. Intermittent failures may be caused by sensor, connector or wiring problems. See INTERMITTENTS in the TESTS W/O CODES article.
NOTE:
Follow diagnostic routine when testing engine control systems. See DIAGNOSTIC ROUTINE table for correct order of procedure.
DIAGNOSTIC ROUTINE
| Procedure | Order | ||
|---|---|---|---|
| Basic Diagnostic Procedures | 1st | ||
| Entering Diagnostics | 2nd | ||
| Retrieving Trouble Codes | 3rd | ||
| Symptoms (1) | 4th | ||
| Intermittents (1) | 5th | ||
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