Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

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

2

This step determines if the 12 volts reference circuit to the CKP "A", the CKP "B" and the CMP is shorted to a ground. If all 3 DTCs are set, this indicated the circuit is shorted to a ground or a sensor is internally shorted. All 3 DTCs set because the 12 volt reference circuit is internally connected within the PCM. The engine will not start with this condition.

8

This step determines if the CMP sensor is shorted internally. If the 12 volt reference parameter changes from Fault to OK, the conditions is with the sensor.

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.

10

This step determines if the CKP "B" sensor is shorted internally. If the 12 volt reference parameter changes from Fault to OK, the conditions is with the sensor.