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Acura CSX. Manual - part 265

０１

−

YES

14-141

PCM CONNECTOR B (44P)

OP2SW (BLU/RED)

10. Check the 2nd Pressure Switch in the Data List with

the HDS.

Replace the 2nd clutch transmission fluid

pressure switch (see page 14-228), then go to step
15.

Go to step 11.

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

12. Jump the SCS line with the HDS.

13. Disconnect PCM connector B (44P).

14. Check for continuity between PCM connector

terminal B8 and body ground.

Repair short to body ground in the wire

between PCM connector terminal B8 and the 2nd
clutch transmission fluid pressure switch, then go
to step 15.

Go to step 22.

15. Reconnect all connectors.

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

17. Clear the DTC with the HDS.

18. Start the engine, and warm it up to normal

operating temperature (the radiator fan comes on).

19. Test-drive the vehicle in 2nd gear with the shift

lever in D for at least 2 seconds, then drive in 4th
gear for at least 2 seconds.

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

Check for intermittent short to body ground

in the wire between the 2nd clutch transmission
fluid pressure switch and the PCM, then go to step
1.

Go to step 21.

21. Monitor the OBD STATUS for P0842 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 20,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for

intermittent short to body ground in the wire
between the 2nd clutch transmission fluid pressure
switch and the PCM, then go to step 1. If the HDS
indicates NOT COMPLETED, go to step 18.

22. Reconnect all connectors.

23. Update the PCM if it does not have the latest

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

24. Start the engine, and warm it up to normal

operating temperature (the radiator fan comes on).

25. Test-drive the vehicle in 2nd gear with the shift

lever in D for at least 2 seconds, then drive in 4th
gear for at least 2 seconds.

Terminal side of female terminals

Is the 2nd Pr essur e Switch OF F ?

Is ther e continuity?

Is DT C P0842 indicated?

Does the HDS indicate PASSED?

08/08/21 14:42:34 61SNR030_140_0143

＋

ＳＮＲ９ＡＡ１Ｋ７７１０００９０８４３ＦＡＡＴ００

−

YES

DTC P0843:

14-142

Automatic Transmission

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

Check for intermittent short to body ground

in the wire between the 2nd clutch transmission
fluid pressure switch and the PCM. If the PCM was
updated, substitute a known-good PCM (see page
11-7), then go to step 24. If the PCM was substituted,
go to step 1.

Go to step 27.

27. Monitor the OBD STATUS for P0842 in the DTCs

MENU with the HDS.

If the PCM was updated, troubleshooting is

complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 26,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for

intermittent short to body ground in the wire
between the 2nd clutch transmission fluid pressure
switch and the PCM. If the PCM was updated,
substitute a known-good PCM (see page 11-7), then
go to step 24. If the PCM was substituted, go to step
1. If the HDS indicates NOT COMPLETED, go to step
24.

NOTE:

• Before you troubleshoot, record all freeze data and

any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).

• This code is caused by an electrical circuit problem

and cannot be caused by a mechanical problem in the
transmission.

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

2. Clear the DTC with the HDS.

3. Start the engine, and warm it up to normal

operating temperature (the radiator fan comes on).

4. Shift to S, then select 2nd gear by pressing the

paddle shifter

(upshift switch) while pressing the

brake pedal, and check if the Shift Control indicates
2nd in the Data List with the HDS.

5. Check the 2nd Pressure Switch in the Data List with

the HDS .

Go to step 6.

Go to step 8.

6. Test-drive the vehicle in 2nd gear with the shift

lever in D for at least 2 seconds.

7. Monitor the OBD STATUS for P0843 in the DTCs

MENU with the HDS.

Go to step 8.

If the HDS indicates PASSED, intermittent

failure, the system is OK at this time. Check for
poor connections or loose terminals between the
2nd clutch transmission fluid pressure switch and
the PCM. If the HDS indicates NOT COMPLETED, go
to step 6.

Open in 2nd Clutch Transmission

Fluid Pressure Switch Circuit, or 2nd Clutch
Transmission Fluid Pressure Switch Stuck
OFF

Is DT C P0842 indicated?

Does the HDS indicate PASSED?

Is the 2nd Pr essur e Switch ON?

Does the HDS indicate F AILED?

08/08/21 14:42:34 61SNR030_140_0144

０１

０２

−

YES

14-143

2ND CLUTCH TRANSMISSION FLUID
PRESSURE SWITCH CONNECTOR

OP2SW (BLU/RED)

PCM CONNECTOR B (44P)

OP2SW (BLU/RED)

2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
CONNECTOR

OP2SW
(BLU/RED)

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

9. Disconnect the 2nd clutch transmission fluid

pressure switch connector.

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

11. Measure the voltage between the 2nd clutch

transmission fluid pressure switch connector
terminal and body ground.

Replace the 2nd clutch transmission fluid

pressure switch (see page 14-228), then go to step
16.

Go to step 12.

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

13. Jump the SCS line with the HDS.

14. Disconnect PCM connector B (44P).

15. Check for continuity between PCM connector

terminal B8 and the 2nd clutch transmission fluid
pressure switch connector terminal.

Go to step 23.

Repair open in the wire between PCM

connector terminal B8 and the 2nd clutch
transmission fluid pressure switch, then go to step
16.

16. Reconnect all connectors.

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

18. Clear the DTC with the HDS.

19. Start the engine, and warm it up to normal

operating temperature (the radiator fan comes on).

Wire side of female terminals

Wire side of
female terminals

Terminal side of
female terminals

Is ther e about 5 V ?

Is ther e continuity?

08/08/21 14:42:34 61SNR030_140_0145

−

YES

14-144

Automatic Transmission

20. Test-drive the vehicle in 2nd gear with the shift

lever in D for at least 2 seconds, then drive in 4th
gear for at least 2 seconds.

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

Check for poor connections or loose

terminals between the 2nd clutch transmission
fluid pressure switch and the PCM, then go to step
1.

Go to step 22.

22. Monitor the OBD STATUS for P0843 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 21,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for poor

connections or loose terminals between the 2nd
clutch transmission fluid pressure switch and the
PCM, then go to step 1. If the HDS indicates NOT
COMPLETED, go to step 19.

23. Reconnect all connectors.

24. Update the PCM if it does not have the latest

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

25. Start the engine, and warm it up to normal

operating temperature (the radiator fan comes on).

26. Test-drive the vehicle in 2nd gear with the shift

lever in D for at least 2 seconds, then drive in 4th
gear for at least 2 seconds.

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

Check for poor connections or loose

terminals between the 2nd clutch transmission
fluid pressure switch and the PCM. If the PCM was
updated, substitute a known-good PCM (see page
11-7), then go to step 25. If the PCM was substituted,
go to step 1.

Go to step 28.

28. Monitor the OBD STATUS for P0843 in the DTCs

MENU with the HDS.

If the PCM was updated, troubleshooting is

complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 27,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for poor

connections or loose terminals between the 2nd
clutch transmission fluid pressure switch and the
PCM. If the PCM was updated, substitute a known-
good PCM (see page 11-7), then go to step 25. If the
PCM was substituted, go to step 1. If the HDS
indicates NOT COMPLETED, go to step 25.

Is DT C P0843 indicated?

Does the HDS indicate PASSED?

Is DT C P0843 indicated?

Does the HDS indicate PASSED?

08/08/21 14:42:34 61SNR030_140_0146

Content .. 263 264 265 266 ..