Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

1. The On-Board Diagnostic (OBD II) System Check prompts the technician to complete some basic checks and store the Freeze Frame and Failure Records data on the scan tool if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference.
2. This step determines if DTC P0016 is the result of a hard failure or an intermittent condition.
3. The counter should stop incrementing with the sensor electrical connector disconnected and set a DTC P0340 with the sensor disconnected. If it still increments the ECM is malfunctioning.
4. By moving the CMP sensor electrical connector, the connections at the sensor are checked. Make sure the electrical connector remains securely fastened.
5. A poor connection in any of the circuits at the CMP will cause the CMP Resync Counter to increment. Anytime a poor connection is present, the CMP Reference Activity counter will stop incrementing and the CMP Resync Counter will increment.
6. The replacement ECM must be reprogrammed.

   Refer to the latest Techline procedure for ECM reprogramming.