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Acura RSX Honda Integra. Manual - part 180

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YES

11-426

EVAP System

DTC Troubleshooting (cont’d)

EVAP CANISTER PURGE VALVE 2P CONNECTOR

IG1
(BLK/YEL)

EVAP CANISTER PURGE VALVE 2P CONNECTOR

PCS (YEL/BLU)

JUMPER WIRE

ECM/PCM CONNECTOR B (24P)

PCS (YEL/BLU)

EVAP CANISTER PURGE VALVE 2P CONNECTOR

14. Turn the ignition switch OFF.

15. Disconnect the EVAP canister purge valve 2P

connector.

16. Turn the ignition switch ON (II).

17. Measure voltage between EVAP canister purge

valve 2P connector terminal No. 1 and body ground.

Go to step 18.

Repair open in the wire between the EVAP

canister purge valve and the No. 4 ACG (10 A) fuse
in the under-dash fuse/relay box, then go to step 25.

18. Turn the ignition switch OFF.

19. Jump the SCS line with the HDS.

20. Disconnect ECM/PCM connector B (24P).

21. Connect EVAP canister purge valve 2P connector

terminal No. 2 to body ground with a jumper wire.

22. Check for continuity between ECM/PCM connector

terminal B21 and body ground.

Go to step 23.

Repair open in the wire between the EVAP

canister purge valve and the ECM/PCM (B21), then
go to step 25.

23. Measure resistance between EVAP canister purge

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

Go to step 31.

Go to step 24.

Wire side of female terminals

Terminal side of male terminals

Is ther e batter y voltage?

Is ther e continuity?

Is ther e about 33

at r oom temper atur e?

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YES

11-427

24. Replace the EVAP canister purge valve (see page

11-412).

25. Reconnect all connectors.

26. Turn the ignition switch ON (II).

27. Reset the ECM/PCM with the HDS.

28. Do the ECM/PCM idle learn procedure (see page

11-349).

29. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0443 is indicated, check for poor

connections or loose terminals at the EVAP canister
purge valve and the ECM/PCM, then go to step 1. If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.

Troubleshooting is complete.

30. Monitor the OBD STATUS for DTC P0443 in the

DTCs MENU with the HDS.

Troubleshooting is complete.

If the screen indicates FAILED, check for poor

connections or loose terminals at the EVAP canister
purge valve and the ECM/PCM, then go to step 1. If
the screen indicates EXECUTING, keep idling until
a result comes on. If the screen indicates OUT OF
CONDITION, go to step 28 and recheck.

31. Update the ECM/PCM if it does not have the latest

software, or substitute a known-good ECM/PCM
(see page 11-6).

32. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0443 is indicated, check for poor

connections or loose terminals at the EVAP canister
purge valve and the ECM/PCM, then go to step 1. If
any other Temporary DTCs or DTCs are indicated,
go to the indicated DTC’s troubleshooting.

If the ECM/PCM was updated, troubleshooting

is complete. If the ECM/PCM was substituted,
replace the original ECM/PCM (see page 11-284).

Ar e any T empor ar y DT Cs or DT Cs indicated?

Does the scr een indicate PASSED?

Ar e any T empor ar y DT Cs or DT Cs indicated?

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DTC P0451:

Special Tools Required

YES

11-428

EVAP System

DTC Troubleshooting (cont’d)

ECM/PCM CONNECTOR E (31P)

SG3 (PNK)

FTP (LT GRN)

ECM/PCM CONNECTOR E (31P)

SG3 (PNK)

FTP (LT GRN)

FTP Sensor Circuit Range/

Performance Problem
(2002-2004 models)

Vacuum pump/gauge, 0

30 in.Hg, Snap-on YA4000A

or equivalent, commercially available

1. Remove the fuel fill cap.

2. Turn the ignition switch ON (II).

3. Monitor the fuel tank pressure (FTP) sensor voltage

with the HDS, or measure voltage between ECM/
PCM connector terminals E4 and E14.

Go to step 4.

Replace the FTP sensor (see page 11-473).

4. Turn the ignition switch OFF.

5. Disconnect the hose between the EVAP two way

valve and the FTP sensor at the EVAP two way
valve end.

6. Connect the vacuum pump/gauge, 0

30 in.Hg, to

the open end of that hose.

7. Turn the ignition switch ON (II).

8. Monitor the FTP sensor voltage with the HDS, or

measure voltage between ECM/PCM connector
terminals E4 and E14, and slowly squeeze the
vacuum pump/gauge. Stop applying vacuum when
the voltage drops to about 1.5 V or damage to the
FTP sensor may occur.

9. The voltage should drop smoothly from about 2.5 V

down to about 1.5 V.

Update the ECM/PCM if it does not have the

latest software, or substitute a known-good ECM/
PCM (see page 11-6), then recheck. If the symptom/
indication goes away with a known-good ECM/PCM,
replace the original ECM/PCM (see page 11-284).

Replace the FTP sensor (see page 11-473).

Wire side of female terminals

Is ther e about 2.5 V ?

Does the voltage dr op to about 1.5 V and hold?

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DTC P0451:

YES

11-429

FTP Sensor Circuit Range/

Performance Problem
(2005-2006 models)

NOTE: If DTC P2422 is stored at the same time as DTC
P0451, troubleshoot DTC P2422 first, then recheck for
DTC P0451.

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, and let it idle.

4. Monitor the OBD STATUS for DTC P0451 in the

DTCs MENU with the HDS.

Go to step 5.

If the screen indicates PASSED, intermittent

failure, system is OK at this time. Check for poor
connections or loose terminals at the FTP sensor
and the ECM/PCM. If the screen indicates NOT
COMPLETED, go to step 3 and recheck.

5. Turn the ignition switch OFF.

6. Replace the FTP sensor (see page 11-473).

7. Turn the ignition switch ON (II).

8. Reset the ECM/PCM with the HDS.

9. Do the ECM/PCM idle learn procedure (see page

11-349).

10. Start the engine, and let it idle.

11. Check for Temporary DTCs or DTCs with the HDS.

If DTC P0451 is indicated, check for poor

connections or loose terminals at the FTP sensor
and the ECM/PCM, then go to step 1. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.

Go to step 12.

12. Monitor the OBD STATUS for DTC P0451 in the

DTCs MENU with the HDS.

Troubleshooting is complete.

If the screen indicates FAILED, check for poor

connections or loose terminals at the FTP sensor
and the ECM/PCM, then go to step 1. If the screen
indicates NOT COMPLETED, go to step 10 and
recheck.

Does the scr een indicate F AILED?

Ar e any T empor ar y DT Cs or DT Cs indicated?

Does the scr een indicate PASSED?

05/06/27 17:43:13 61S6M040_110_0429

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