Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

1. 2
   
   This step determines if the 12-volt reference circuit to the CKP "A", the CKP "B", and the CMP are shorted to a ground. If all 3 DTCs are set, this indicates the circuit is shorted to a ground or a sensor is internally shorted. All 3 DTCs set because the 12-volt reference circuit are internally connected within the PCM. The engine will not start with this condition.
2. 8
   
   This step determines if the CMP sensor is shorted internally. If the 12-VOLT REFERENCE parameter changes from Fault to OK, the condition is with the sensor.
3. 9
   
   This step determines if the CKP "A" sensor is shorted internally. If the 12-VOLT REFERENCE parameter changes from Fault to OK, the condition is with the sensor.
4. 10
   
   This step determines if the CKP "B" sensor is shorted internally. If the 12-VOLT REFERENCE parameter changes from Fault to OK, the condition is with the sensor.