P0498
DTC P0498: EVAP Canister Vent Shut Valve Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS, then wait 5 seconds.
3. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC P0498 indicated?
YES - Go to step 6.
NO - Go to step 4.
4. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
5. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC P0498 indicated?
YES - Go to step 6.
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.
6. Turn the ignition switch OFF.
7. Disconnect the EVAP canister vent shut valve 2P connector.
8. Measure resistance between EVAP canister vent shut valve 2P connector terminals No.1 and No.2.
Is there about 25 - 30 Ohms at room temperature?
YES - Go to step 9.
NO - Go to step 12.
9. Jump the SCS line with the HDS.
10. Disconnect ECM/PCM connector E (31P).
11. Check for continuity between ECM/PCM connector terminal E19 and body ground.
Is there continuity?
YES - Repair short in the wire between the EVAP canister vent shut valve and the ECM/PCM (E19), then go to step 13.
NO - Go to step 20.
12. Replace the EVAP canister vent shut valve.
13. Reconnect ECM/PCM connector E (31P).
14. Reconnect the EVAP canister vent shut valve 2P connector.
15. Turn the ignition switch ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure.
18. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
19. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0498 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 troubleshooting.
NO - Troubleshooting is complete.
20. Update the ECM/PCM if it does not have the latest software, or substitute a known good ECM/PCM.
21. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.
22. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P0498 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 troubleshooting.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.