Honda Civic. Manual — part 603

Fig. 26: Connecting T-Fitting From Vacuum Pump/Gauge And Vacuum
Pump To FTP Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.

15. Check and record the FTP SENSOR reading in the DATA LIST with the HDS.
16. Slowly apply about 1.3 kPa (0.4 in.Hg, 10 mmHg) of vacuum to the hose.
17. Check the FTP SENSOR in the DATA LIST with the HDS.

Is the difference more than 1.1 kPa (0.31 in.Hg, 8 mmHg) before and after
applying vacuum?

YES - Go to step 18.

NO - Replace the FTP sensor (see FTP SENSOR REPLACEMENT ), then
go to step 22.

18. Reconnect the vacuum hoses to the EVAP canister purge line (EVAP canister

side), and reinstall the FTP sensor.

19. Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge

valve (B), and connect a T-fitting (C) from the vacuum gauge and the vacuum
pump/gauge, 0-30 in.Hg, to the hose as shown.

2008 Honda Civic EX

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

Fig. 27: Connecting T-Fitting From Vacuum Gauge And Vacuum
Pump/Gauge To Hose
Courtesy of AMERICAN HONDA MOTOR CO., INC.

20. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
21. Slowly apply about 2 kPa (0.6 in.Hg, 15 mmHg) of vacuum to the hose.

Does the hose hold vacuum?

YES - Check for blockage at the EVAP canister port, then go to step 22.

NO - Replace the EVAP canister vent shut valve (see EVAP CANISTER
VENT SHUT VALVE REPLACEMENT ), then go to step 22.

22. Reconnect all hoses.
23. Turn the ignition switch ON (II).
24. Reset the ECM with the HDS.
25. Do the ECM idle learn procedure (see ECM IDLE LEARN PROCEDURE ).
26. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Troubleshooting is complete.

2008 Honda Civic EX

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

NO - Check for poor connections or loose terminals at the FTP sensor, the
EVAP canister purge valve, the EVAP canister vent shut valve, and the ECM,
then go to step 1.

DTC P0497: EVAP SYSTEM LOW PURGE FLOW DETECTED ('07 MODEL)

Special Tools Required

Vacuum/pressure gauge, 0-4 in.Hg 07JAZ-001000B

Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent,
commercially available

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals at the FTP sensor and the ECM.

NO - Go to step 4.

4. Turn the ignition switch OFF.
5. Check for poor connection, blockage, or damage at the EVAP canister purge

line between the throttle body and the EVAP canister.

Is the line OK?

YES - Go to step 5.

NO - Reconnect or repair the EVAP canister purge line, then go to step 24.

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)

6. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B).

Fig. 28: Disconnecting Vacuum Hose From EVAP Canister Purge Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Disconnect the vacuum hose from the purge line (at the EVAP canister side),

and connect a T-fitting (A) from the vacuum gauge and the vacuum
pump/gauge, 0-30 in.Hg, to the hose as shown.

Fig. 29: Connecting T-Fitting From Vacuum Gauge And Vacuum
Pump/Gauge To Hose

2008 Honda Civic EX

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