Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If all DTCs have been diagnosed and repaired, go to next step. If any DTCs have not been diagnosed, perform appropriate DTC test and finish diagnosing remaining DTCs as necessary.
NOTE:
A Leak Detection Pump (LDP) dealer test mode is used when performing this test to verify repairs and check operation of the leak detection pump system. When performing this test, the operating mode of the Powertrain Control Module (PCM) will be changed. It is critical that the LDP dealer test mode must not be interrupted. If LDP dealer test mode is interrupted, the PCM will remain in the changed mode. This will cause the PCM to illuminate the MIL for 8-10 minutes of driving and no DTCs will being stored in the PCM. Clearing DTCs from PCM will not change the MIL operation. If a vehicle is found with PCM stuck in this changed mode, LDP dealer test should be performed in its entirety so proper PCM operating mode may be obtained. The LDP dealer test will only store a small leak DTC to indicate there is a problem with the system. The system failure may have been caused by a large leak, but the PCM will only set the small leak DTC to indicate that a failure occurred during the test.