Acura TSX / Honda Accord CL. Manual — part 540

YES: Go to step 9.

NO:

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Replace the fuel tank vapor recirculation tube, then go to step 22 .

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If necessary, replace the fuel tank (see FUEL TANK REPLACEMENT ), then go to
step22 .

9. Disconnect the fuel tank vapor recirculation tube (A) from the EVAP canister (B), and plug the EVAP

canister port (C).

Fig. 4: Disconnecting The Fuel Tank Vapor Recirculation Tube From The EVAP Canister &
Plugging The EVAP Canister Port

10. Disconnect the vacuum hose (purge line) from the EVAP canister purge valve (A), in the engine

compartment and connect a vacuum pump to the hose.

2004 Acura TSX

2004 ENGINE PERFORMANCE EVAP System - TSX

Fig. 5: Disconnecting The Vacuum Hose (Purge Line) From The EVAP Canister Purge Valve

11. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

12. Apply vacuum to the hose until the FTP reads 1.90 V (-0.5 in. Hg, -14.6 mm Hg).

13. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.

Does the voltage stay near 0.2 V (0.1 in. Hg, 0.5 mm Hg)?

YES: Go to step 19 .

NO: Go to step 14.

14. Do the EVAP CVS OFF in the INSPECTION MENU with the HDS.

15. Disconnect the fresh air hoses (A) from the EVAP canister vent shut valve (B), and plug the EVAP

canister vent shut valve ports (C).

2004 Acura TSX

2004 ENGINE PERFORMANCE EVAP System - TSX

Fig. 6: Disconnecting The Fresh Air Hoses From The EVAP Canister Vent Shut Valve & Plugging
The EVAP Canister Vent Shut Valve Ports

16. Apply vacuum to the hose (disconnected in step 10) until the FTP reads 1.90 V (-0.5 in. Hg, -14.6 mm

Hg).

17. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.

Does the voltage stay near 0.2 V (0.1 in. Hg, 0.5 mm Hg)?

YES: Replace the EVAP canister vent shut valve, then go to step 21 .

NO: Go to step 18.

18. Check for a loose or damaged PCS line between the EVAP canister and the EVAP canister purge valve.

Is the line OK?

YES: Replace the following parts, then go to step 21 .

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FTP sensor O-ring

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EVAP canister vent shut valve case and O-ring

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EVAP canister

NO: Reconnect or repair the PCS hose, then go to step 21 .

2004 Acura TSX

2004 ENGINE PERFORMANCE EVAP System - TSX

19. Do the EVAP CVS OFF in the INSPECTION MENU with the HDS.

20. Check these parts for looseness or damage.

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Fuel fill pipe

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Fuel vapor return pipe

Are the parts OK?

YES: Check the fuel pump base gasket (see FUEL PUMP/FUEL GAUGE
SENDING UNIT REPLACEMENT ), and check the fuel tank, then go to step 21.

NO: Repair or replace any damaged parts, then go to step 21.

21. Reconnect all hoses.

22. Turn the ignition switch ON (II).

23. Reset the ECM/PCM with the HDS.

24. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).

25. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES: Troubleshooting is complete.

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

DTC P0443: EVAP CANISTER PURGE VALVE CIRCUIT MALFUNCTION

Special Tools Required: Vacuum Pump/Gauge, 0-30 in. Hg A973X-041-XXXXX

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine. Hold the engine speed at 3,000 RPM with no load (in Park or neutral) until the radiator

fan comes on, then let it idle.

4. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P0443 indicated?

YES: Go to step 5.

NO: Intermittent failure, system is OK at this time. Check for poor connections or loose
terminals at the EVAP canister purge valve and the ECM/PCM.

5. Turn the ignition switch OFF, and allow the engine to cool below 131°F (55°C).

6. Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) in the engine compartment and

connect a vacuum pump/gauge to the hose.

2004 Acura TSX

2004 ENGINE PERFORMANCE EVAP System - TSX