Verification Test VER-6A - EVAP Leak Detection System

IMPORTANT NOTE: If the Powertrain Control Module (PCM) has been changed and the correct VIN and mileage have not been programmed, a Diagnostic Trouble Code (DTC) will be set in the ABS and Air bag modules. In addition, if the vehicle is equipped with a Smart Key Immobilizer Module (SKIM), Secret Key data must be updated to enable starting.

For ABS and Air Bag systems:

ACTION:
1. Enter correct VIN and Mileage in PCM.
2. Erase codes in ABS and Air Bag modules.

For SKIM theft alarm:

ACTION:
1. Connect the DRB to the data link connector.
2. Go to Engine, Misc. and place the SKIM in secured access mode, by using the appropriate PIN code for this vehicle.
3. Select Update the Secret Key data, data will be transferred from the SKIM to the PCM.

Inspect the vehicle to ensure that all engine components are connected. Reassemble and reconnect components as necessary.

If there are any existing diagnostic trouble codes that have not been repaired, perform DTC TEST and follow the path specified. After all diagnostic trouble codes have been repaired, return to TEST VER-A and run the LDP Dealer Test Mode under Systems Test in the DRBIII.

The LDP Dealer Test Mode has been added to the DRBIII to verify repairs to the LDP System. A DRB software program was written which causes the PCM to run the LDP Monitor as part of this test. Test failures will be indicated through a stored DTC.

Dealer Test Mode is a useful way to run a total system performance test. Use this test to verify any type of LDP system repair.

The software program makes temporary changes to the operating mode of the PCM. For this reason, it is critical that the test not be interrupted. PCM's left in this mode as the result of an interrupted test will illuminate the MIL for 8-10 miles of driving with no DTC's stored. Erasing DTC's will not change this condition.

If a vehicle is found to be stuck in the mode described above, the LDP Dealer Test should be re-run in its entirety so that the software program in the DRBIII can restore the PCM operating mode.

Note the similarity to the LDP Monitor screen found under OBDII Monitors. Failure modes are fewer in this System Test than in the OBDII LDP Monitor. The System Test will only store the Small Leak DTC to indicate a problem with the system. No other type of failure mode indication is given. The System Test failure may have been, for example, due to a large leak, but the PCM will set the Small Leak DTC to indicate failures that occurred as part of the system test.

1. Connect the DRB to the data link connector.
2. Turn off all accessories.
3. With the DRBIII in LDP Dealer Test Mode follow the instructions on the screen.

NOTE: For this test to be valid, the engine must remain at idle, in park and no throttle pedal input during the entire test.

4. If the Small Leak DTC trouble code has set, the repair is not complete. Check for any related Technical Service Bulletins and return to DTC TEST.
- If any other trouble code has set, return to DTC TEST and follow the path specified for that trouble code.
- If there are no trouble codes, the repair was successful and is now complete.