Honda Civic. Manual — part 605

No. 2 and body ground.

Fig. 33: Measuring Voltage Between EVAP Canister Vent Shut Valve 2P
Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 10.

NO - Repair open in the wire between the EVAP canister vent shut valve and
the PGM-FI subrelay, then go to step 18.

10. Turn the ignition switch OFF.
11. At the valve side, measure resistance between EVAP canister vent shut valve

2P connector terminals No. 1 and No. 2.

Fig. 34: Measuring Resistance Between EVAP Canister Vent Shut Valve
2P Connector Terminals No. 1 And 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EVAP System (K20Z3) - Civic (Except GX & Si)

Is there about 25-30 0, at room temperature?

YES - Go to step 12.

NO - Go to step 17.

12. Jump the SCS line with the HDS.
13. Disconnect ECM connector A (44P).
14. Check for continuity between ECM connector terminal A10 and body ground.

Fig. 35: Checking Continuity Between ECM Connector Terminal A10
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between the EVAP canister vent shut valve and
the ECM (A10), then go to step 18.

NO - Go to step 15.

15. Connect EVAP canister vent shut valve 2P connector terminal No. 1 to body

ground with a jumper wire.

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EVAP System (K20Z3) - Civic (Except GX & Si)

Fig. 36: Connecting EVAP Canister Vent Shut Valve 2P Terminal No. 1
To Body Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

16. Check for continuity between ECM connector terminal A10 and body ground.

Fig. 37: Checking Continuity Between ECM Connector Terminal A10
And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 25.

NO - Repair open in the wire between the EVAP canister vent shut valve and
the ECM (A10), then go to step 18.

17. Replace the EVAP canister vent shut valve (see EVAP CANISTER VENT

SHUT VALVE REPLACEMENT ).

18. Reconnect all connectors.

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EVAP System (K20Z3) - Civic (Except GX & Si)

19. Turn the ignition switch ON (II).
20. Reset the ECM with the HDS.
21. Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
22. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
23. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0498 indicated?

YES - Check for poor connections or loose terminals at the EVAP canister
vent shut valve and the ECM, then go to step 1.

NO - Go to step 24.

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

HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTSs
were indicated in step 23, 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, then go to step 1.
If the screen indicates NOT COMPLETED, go to step 22.

25. Reconnect all connectors.
26. Update the ECM if it does not have the latest software (see UPDATING THE

ECM ), or substitute a known-good ECM (see SUBSTITUTING THE
ECM ).

27. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
28. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0498 indicated?

YES - Check for poor connections or loose terminals at the EVAP canister
vent shut valve and the ECM. If the ECM was updated, substitute a known-

2008 Honda Civic EX

2006-08 ENGINE PERFORMANCE EVAP System (K20Z3) - Civic (Except GX & Si)