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 to 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 P0340 is the result of a hard failure or an intermittent condition.
3. Determines if voltage is available to the CMP.
4. This step checks for a voltage supplied by the ECM to the CMP.
5. The replacement ECM must be reprogrammed.

   Refer to the latest Techline procedure for ECM reprogramming.