DTC Troubleshooting

Control System DTCs

DTC Troubleshooting: P0499

DTC P0499 : EVAP Canister Vent Shut Valve Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information How to Troubleshoot the Fuel And Emissions Systems.


1. Problem verification:


-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS. How to Troubleshoot the Fuel And Emissions Systems

-3. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

-4. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0499 indicated?
-YES- Failure is duplicated. Update the PCM PCM Update if it does not have the latest software, or substitute a known-good PCM Service and Repair, then do the repair verification.
-NO- Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM.

Repair verification (OBD STATUS check):

-1. Turn the ignition switch to ON (II).

-2. Reset the PCM with the HDS How to Troubleshoot the Fuel And Emissions Systems.

-3. Do the PCM idle learn procedure PCM Idle Learn Procedure.

-4. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

-5. Monitor the OBD STATUS for DTC P0499 in the DTCs MENU with the HDS.





Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
-PASSED- Troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
-FAILED- Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM Service and Repair, then check the OBD STATUS again.
-NOT COMPLETED- Meet the test condition, and check the OBD STATUS again.