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6E–282 ENGINE DRIVEABILITY AND EMISSIONS Cuts Out, Misses Symptom
Step Action Value(s) Yes No 1 DEFINITION: Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Perform a bulletin search. correct the condition as instructed in the bulletin. Was a bulletin found that addresses the symptom? — Go to Step 13 Go to Step 3 3 Was a visual/physical check performed? — Go to Step 4 Go to Visual/Physic al Check 4 1. Check the PCM grounds for clearness, tightness and proper routing. Refer to the PCM wiring Electrical Diagnosis. 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 5 5 Observe the long term fuel trim on Tech 2. Is the long term fuel trim significantly in the negative — Go to Step 6 Go to Step 7 6 1. Check items that can cause the engine to run rich. Refer to Diagnostic Aids in DTC P0172 Diagnostic Support. 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 9 7 Is the long term fuel trim significantly in the positive — Go to Step 8 Go to Step 9 8 1. Check items that can cause the engine to run lean. Refer to Diagnostic Aids in DTC P0171 Diagnostic Support. 2. If a problem is found, repair as necessary. Was a problem found? — Verify repair Go to Step 9 9 1. Check for incorrect idle speed. Ensure that the following conditions are present: D The engine is fully warm. D The accessories are “off.” 2. Using Tech 2, monitor the IAC position. Is the IAC position within the specified values? Between 5 and 50 counts Go to Step 11 Go to Step 10 |