Test Description

The numbers below refer to the step number in the diagnostic procedure.

1. 2
   
   This step verifies that the fault is present.
2. 5
   
   This step determines if the fault is in the ignition 1 voltage circuit or the low reference circuit.
3. 6
   
   This step tests the CMP sensor signal circuit. Applying a ground causes the CMP signal Active Counter to increment when the circuit is touched if the circuit and the ECM are operating properly.