Content .. 175 176 177 178 ..

Acura CSX. Manual - part 177

０３

０４

−

YES

11-376

EVAP System

PCS (YEL/BLU)

EVAP CANISTER PURGE VALVE
2P CONNECTOR

IG1 (BLK/YEL)

EVAP CANISTER PURGE VALVE
2P CONNECTOR

11. Jump the SCS line with the HDS.

12. Disconnect ECM/PCM connector B (44P).

13. Check for continuity between EVAP canister purge

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

Repair short in the wire between the EVAP

canister purge valve and the ECM/PCM (B3), then
go to step 24.

Go to step 30.

14. Turn the ignition switch to LOCK (0).

15. Disconnect the EVAP canister purge valve 2P

connector.

16. Turn the ignition switch to ON (II).

17. Measure the 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. 3 ALTERNATOR
(10 A) fuse in the under-dash fuse/relay box, then
go to step 24.

18. Turn the ignition switch to LOCK (0).

19. Jump the SCS line with the HDS.

20. Disconnect ECM/PCM connector B (44P).

Wire side of female terminals

Is ther e continuity?

Is ther e batter y voltage?

08/08/21 14:32:33 61SNR030_110_0376

０５

０６

−

YES

11-377

ECM/PCM CONNECTOR B (44P)

EVAP CANISTER PURGE VALVE
2P CONNECTOR

PCS (YEL/BLU)

EVAP CANISTER PURGE VALVE
2P CONNECTOR

21. Check for continuity between ECM/PCM connector

terminal B3 and EVAP canister purge valve 2P
connector terminal No. 2.

Go to step 22.

Repair open in the wire between the EVAP

canister purge valve and the ECM/PCM (B3), then
go to step 24.

22. At the valve side, measure the resistance between

EVAP canister purge valve 2P connector terminals
No. 1 and No. 2.

Go to step 30.

Go to step 23.

23. Replace the EVAP canister purge valve (see page

11-409).

24. Reconnect all connectors.

25. Turn the ignition switch to ON (II).

26. Reset the ECM/PCM with the HDS.

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

11-310).

Wire side of
female terminals

Terminal side of female terminals

Terminal side of male terminals

Is ther e continuity?

Is ther e about 25

at r oom temper atur e?

08/08/21 14:32:33 61SNR030_110_0377

−

YES

11-378

EVAP System

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

Check for poor connections or loose

terminals at the EVAP canister purge valve and the
ECM/PCM, then go to step 1.

Go to step 29.

29. Monitor the OBD STATUS for DTC P0443 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 28,
go to the indicated DTC’s troubleshooting.

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 or OUT OF
CONDITION, keep idling until a result comes on.

30. Reconnect all connectors.

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

software (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7).

32. Start the engine, and let it idle.

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

Check for poor connections or loose

terminals at the EVAP canister purge valve and the
ECM/PCM. If the ECM/PCM was updated, substitute
a known-good ECM/PCM (see page 11-7), then go
to step 32. If the ECM/PCM was substituted, go to
step 1.

Go to step 34.

34. Monitor the OBD STATUS for DTC P0443 in the

DTCs MENU with the HDS.

If the ECM/PCM was updated,

troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-228). If any other Temporary DTCs or
DTCs were indicated in step 33, go to the indicated
DTC’s troubleshooting.

If the screen indicates FAILED, check for poor

connections or loose terminals at the EVAP canister
purge valve and the ECM/PCM. If the ECM/PCM
was updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 32. If the ECM/PCM
was substituted, go to step 1. If the screen indicates
EXECUTING or OUT OF CONDITION, keep idling
until a result comes on.

Is DT C P0443 indicated?

Does the scr een indicate PASSED?

Is DT C P0443 indicated?

Does the scr een indicate PASSED?

08/08/21 14:32:33 61SNR030_110_0378

ＳＮＲ９ＡＡ７Ｋ７２１０００９０４５１ＦＡＡＴ３０

−

DTC P0451:

YES

11-379

FTP Sensor Circuit Range/

Performance Problem

NOTE:

• Before you troubleshoot, record all freeze data and

any on-board snapshot, and review the general
troubleshooting information (see page 11-3).

• 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 to ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, and let it idle for 1 minute.

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, the 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, keep idling until a result comes
on.

5. Turn the ignition switch to LOCK (0).

6. Replace the FTP sensor (see page 11-408).

7. Turn the ignition switch to ON (II).

8. Reset the ECM/PCM with the HDS.

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

11-310).

10. Start the engine, then let it idle for 1 minute.

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

Check for poor connections or loose

terminals at the FTP sensor and the ECM/PCM, then
go to step 1.

Go to step 12.

12. Monitor the OBD STATUS for DTC P0451 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 11,
go to the indicated DTC’s troubleshooting.

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, keep idling until a
result comes on.

Does the scr een indicate F AILED?

Is DT C P0451 indicated?

Does the scr een indicate PASSED?

08/08/21 14:32:33 61SNR030_110_0379

Content .. 175 176 177 178 ..