Honda Civic. Manual — part 598

NO - Go to step 31.

31. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the

HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs
were indicated in step 30, go to the indicated DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose
terminals at the FTP sensor and the ECM, then go to step 1. If the screen
indicates NOT COMPLETED, keep idling until a result comes on.

32. Reconnect all connectors.
33. 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 ).

34. Start the engine and let it idle.
35. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0452 indicated?

YES - Check for poor connections or loose terminals at the FTP sensor and the
ECM. If the ECM was updated, substitute a known-good ECM (see
SUBSTITUTING THE ECM ), then go to step 34. If the ECM was
substituted, go to step 1.

NO - Go to step 36.

36. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the

HDS.

Does the screen indicate PASSED?

YES - If the ECM was updated, troubleshooting is complete. If the ECM was
substituted, replace the original ECM (see ECM REPLACEMENT ). If any

2008 Honda Civic EX

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

other Temporary DTCs or DTCs were indicated in step 35, go to the indicated
DTC's troubleshooting.

NO - If the screen indicates FAILED, check for poor connections or loose
terminals at the FTP sensor and the ECM. If the ECM was updated, substitute a
known-good ECM (see SUBSTITUTING THE ECM ), then go to step 34. If
the ECM was substituted, go to step 1. If the screen indicates NOT
COMPLETED, keep idling until a result comes on.

DTC P0453: FTP SENSOR CIRCUIT HIGH VOLTAGE

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Remove the fuel fill cap.
5. Turn the ignition switch ON (II).
6. Check the FTP SENSOR in the DATA LIST with the HDS.

Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated?

YES - Go to step 10.

NO - Go to step 7.

7. Install the fuel fill cap.
8. Start the engine.
9. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the

HDS.

Does the screen indicate FAILED?

NOTE:

Before you troubleshoot, record all freeze data and any on-
board snapshot, and review the general troubleshooting
information (see GENERAL TROUBLESHOOTING
INFORMATION ).

2008 Honda Civic EX

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

YES - Go to step 10.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at
this time. Check for poor connections or loose terminals at the FTP sensor and
the ECM. If the screen indicates NOT COMPLETED, go to step 6 and
recheck.

10. Turn the ignition switch OFF.
11. Disconnect the FTP sensor 3P connector.
12. Connect FTP sensor 3P connector terminals No. 2 and No. 3 with a jumper

wire.

Fig. 12: Connecting FTP Sensor 3P Connector Terminals No. 2 And 3
With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

13. Turn the ignition switch ON (II).
14. Check the FTP SENSOR in the DATA LIST with the HDS.

Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated?

YES - Go to step 15.

NO - Go to step 26.

15. Measure voltage between FTP sensor 3P connector terminals No. 1 and No. 3.

2008 Honda Civic EX

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

Fig. 13: Measuring Voltage Between FTP Sensor 3P Connector Terminals
No. 1 And 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 5 V?

YES - Go to step 21.

NO - Go to step 16.

16. Turn the ignition switch OFF.
17. Jump the SCS line with the HDS.
18. Disconnect ECM connector A (44P).
19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper

wire.

Fig. 14: Connecting FTP Sensor 3P Connector Terminal No. 3 To Body
Ground With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic EX

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