P0499
DTC P0499: EVAP Canister Vent Shut Valve Circuit High Voltage1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS, then wait 5 seconds.
3. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0499 indicated?
YES - Go to step 5.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect the EVAP canister vent shut valve 2P connector.
7. Turn the ignition switch ON (II).
8. Measure voltage between EVAP canister vent shut valve 2P connector terminal No.2 and body ground.
Is there battery voltage?
YES - Go to step 9.
NO - Repair open in the wire between the EVAP canister vent shut valve and the No.4 ACG (10 A) fuse in the under-dash fuse/relay box, then go to step 17.
9. Turn the ignition switch OFF.
10. Measure resistance between EVAP canister vent shut valve 2P connector terminals No.1 and No.2.
Is there about 25 - 30 Ohm, at room temperature?
YES - Go to step 11.
NO - Go to step 15.
11. Jump the SCS line with the HDS.
12. Disconnect ECM/PCM connector E (31P).
13. Connect EVAP canister vent shut valve 2P connector terminal No.1 to body ground with a jumper wire.
14. Check for continuity between ECM/PCM connector terminal E19 and body ground.
Is there continuity?
YES - Go to step 23.
NO - Repair open in the wire between the EVAP canister vent shut valve and the ECM/PCM (E19) then go to step 16.
15. Replace the EVAP canister vent shut valve.
16. Reconnect ECM/PCM connector E (31P).
17. Reconnect the EVAP canister vent shut valve 2P connector.
18. Turn the ignition switch ON (II).
19. Reset the ECM/PCM with the HDS.
20. Do the ECM/PCM idle learn procedure.
21. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
22. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0499 is indicated, check for poor connections or loose terminals at the EVAP canister vent shut valve and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting
NO - Troubleshooting is complete.
23. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
24. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
25. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0499 is indicated, check for poor connections or loose terminals at the EVAP canister vent shut valve and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC s troubleshooting.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.