DTC P0498

DTC P0498  : EVAP Canister Vent Shut Valve Circuit Low Voltage

DTC (PGM-FI)

1. EVAP system check

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0498 EVAP Canister Vent Shut Valve Circuit Low Voltage

   Is DTC P0498 indicated?

   YES 

   Go to step 3.

   NO 

   Go to step 2.

2. Problem verification

   -1. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

   SINGLE SOLENOID

   Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0498 EVAP Canister Vent Shut Valve Circuit Low Voltage

   Is DTC P0498 indicated?

   YES 

   The failure is duplicated. Go to step 3.

   NO 

   The EVAP system is OK. 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.

3. Open wire check (FI SUB RLY OUT line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   EVAP canister vent shut valve 2P connector

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	EVAP canister vent shut valve 2P connector: disconnected
   Test circuit	FI SUB RLY OUT
   Test point 1	EVAP canister vent shut valve 2P connector No. 1 (LT BLU)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The FI SUB RLY OUT wire is OK. Go to step 4.

   NO 

   Repair an open in the FI SUB RLY OUT wire between the EVAP canister vent shut valve and the PGM-FI subrelay, then do the repair verification.

4. EVAP canister vent shut valve internal resistance check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. At the vent shut valve side, measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	EVAP canister vent shut valve 2P connector: disconnected
   Test circuit	VSV, FI SUB RLY OUT
   Test point 1	EVAP canister vent shut valve 2P connector No. 1 (EVAP canister vent shut valve side)
   Test point 2	EVAP canister vent shut valve 2P connector No. 2 (EVAP canister vent shut valve side)

   Courtesy of HONDA, U.S.A., INC.

   Is there about 25-30 Ω at room temperature?

   YES 

   The EVAP canister vent shut valve is OK. Go to step 5.

   NO 

   Replace the EVAP canister vent shut valve , then do the repair verification.

5. Shorted wire check (VSV line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connector.

   PCM connector A (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	EVAP canister vent shut valve 2P connector: disconnected
   	PCM connector A (51P): disconnected
   Test circuit	VSV
   Test point 1	PCM connector A (51P) No. 15 (GRN)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short in the VSV wire between the EVAP canister vent shut valve and the PCM (A15), then do the repair verification.

   NO 

   The VSV wire is not shorted. Go to step 6.

6. Open wire check (VSV line)

   -1. Connect terminals A and B with a jumper wire.

   Terminal A	EVAP canister vent shut valve 2P connector No. 2 (GRN)
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	EVAP canister vent shut valve 2P connector: disconnected
   	EVAP canister vent shut valve 2P connector No. 2: jumped to body ground
   	PCM connector A (51P): disconnected
   Test circuit	VSV
   Test point 1	PCM connector A (51P) No. 15 (GRN)

   Test point 2

   Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The VSV wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.

   NO 

   Repair an open in the VSV wire between the EVAP canister vent shut valve and the PCM (A15), then do the repair verification.

7. Repair verification (OBD STATUS check)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Reconnect all connectors.

   -3. Exit the SCS mode with the HDS.

   -4. Turn the vehicle to the ON mode.

   -5. Reset the PCM with the HDS .

   Reset PCM

   -6. Do the PCM idle learn procedure .

   -7. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

   SINGLE SOLENOID

   Monitor the OBD STATUS for DTC P0498 in the DTCs MENU with the HDS.

   DTC Description	OBD STATUS
   P0498 EVAP Canister Vent Shut Valve Circuit Low Voltage

   DTC (PGM-FI)

   Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

   PASSED

   Troubleshooting is complete. If the PCM was substituted, replace the original PCM . 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 , then check the OBD STATUS again.

   NOT COMPLETED

   Meet the test conditions, and check the OBD STATUS again.