1. Problem Verification

1. Connect a Hi-Scan (Pro) to the data link connector.
2. Start the engine and monitor the CMPS signal at normal operating temperature and no electrical loads.

Is signal continuously fluctuating between OV and 5V? 

No: Go to next step.

Yes: Problem is intermittent or was repaired and engine control module memory was not cleared. Proceed with intermittent problem procedure.