Test Description

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

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

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.

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.

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 condition is with the sensor.