DTC Troubleshooting: P0449
DTC P0449: EVAP Canister Vent Shut Valve Circuit Open
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0449 EVAP Canister Vent Shut Valve Circuit Open
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0449 EVAP Canister Vent Shut Valve Circuit Open
    

Is DTC P0449 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
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. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Open wire check (IGPS(LAF) line):

Open wire check (IGPS(LAF) 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 point 1
EVAP canister vent shut valve 2P connector (female terminals) No. 1:
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The IGPS(LAF) wire is OK. Go to step 3.
     
NO
     
     
     
Repair an open in the IGPS(LAF) wire between the No. A11 (5 A) fuse in the under-hood fuse/relay box and the EVAP canister vent shut valve.?
3.
Open wire check (VSV line):

Open wire check (VSV line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector No. 2 (58P)

?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 No. 2 (58P): disconnected
Test point 1
EVAP canister vent shut valve 2P connector (female terminals) No. 2:
Test point 2
PCM connector No. 2 (58P) No. 37


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the VSV wire between PCM connector No. 2 terminal No. 37 and the EVAP canister vent shut valve.?