Circuit/System Verification
IMPORTANT:
Perform the Crankshaft Position System Variation Learn
before proceeding with this diagnostic procedure.
- Engine running at the normal operating temperature. Verify there is no abnormal engine noise.
- If there is an abnormal engine noise, refer to Symptoms - Engine Mechanical .
- Observe the DTC information with a scan tool. DTCs P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0315, P0335, P0336, P0351, or P0352 should not set.
- If any DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Observe the scan tool Misfire Current Counters. The Counters should not be incrementing.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
IMPORTANT:
A misfire may only occur when the engine is under a load. An engine load may be necessary to verify the condition.