Honda Accord 2008 Manual page 741

07/11/02 09:20:23 61TA0000_110_0422
EVAP System
DTC Troubleshooting (cont'd)
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 (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Select EVAP CVS ON in the INSPECTION MENU
with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P0499 indicated?
YES − Go to step 5.
−
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
ECM/PCM.
5. Update the ECM/PCM if it does not have the latest
software (see page 11-231), or substitute a known-
good ECM/PCM (see page 11-7).
6. Select EVAP CVS ON in the INSPECTION MENU
with the HDS.
7. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P0499 indicated?
YES − Check for poor connections or loose
terminals at the EVAP canister vent shut valve and
the ECM/PCM. If the ECM/PCM was updated,
substitute a known-good ECM/PCM (see page 11-7),
then go to step 6. If the ECM/PCM was substituted,
go to step 1.
− Go to step 8.
NO
11-422
8. Monitor the OBD STATUS for DTC P0499 in the
DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES − If the ECM/PCM was updated,
troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-232). If any other Temporary DTCs or
DTCs were indicated in step 7, go to the indicated
DTC's troubleshooting.
NO − If the screen indicates FAILED, check for poor
connections or loose terminals at the EVAP canister
vent shut valve and the ECM/PCM. If the ECM/PCM
was updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 6. If the ECM/PCM
was substituted, go to step 1. If the screen indicates
NOT COMPLETED, go to step 6.
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