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Acura CSX. Manual - part 264

−

YES

14-137

9. Select Clutch Pressure Control (Linear) Solenoid

Valve B in the Miscellaneous Test Menu, and test
A/T clutch pressure control solenoid valve B with
the HDS.

Intermittent failure, the system is OK at this

time.

Follow the instructions indicated on the HDS

according to the test result, if the HDS has not
determined the cause of the failure, go to step 10. If
any part was replaced, go to step 11.

10. Inspect A/T clutch pressure control solenoid valve

B (see page 14-222).

Repair the hydraulic system related to shift

valve B, or replace the transmission, then go to
step 13.

Replace A/T clutch pressure control solenoid

valve B (see page 14-226), then go to step 11.

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

12. Clear the DTC with the HDS.

13. Test-drive the vehicle with the shift lever in D, and

let the transmission shift through all five gears.

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

Go to step 8.

Go to step 15.

15. Monitor the OBD STATUS for P0776 or P0777 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 14,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, go to step 8. If

the HDS indicates NOT COMPLETED, go to step 13.

Does the HDS indicate NORMAL?

Does A/ T clutch pr essur e contr ol solenoid valve B
wor k pr oper ly?

Is DT C P07 7 6 or P07 7 7 indicated?

Does the HDS indicate PASSED?

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DTC P0780:

YES

14-138

Automatic Transmission

Shift Control System

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 stored whenever DTCs P1730, P1731,

P1732, P1733, or P1734 are detected.

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

2. Clear the DTC with the HDS.

3. Test-drive the vehicle with the shift lever in D, and

let the transmission shift through all five gears.

4. Check for other DTCs indicated along with DTC

P0780.

NOTE: DTC P0780 means there is one or more A/T
DTCs regarding the shift control system.

Go to the indicated DTC’s troubleshooting.

• P1730 (see page 14-195)
• P1731 (see page 14-197)
• P1732 (see page 14-198)
• P1733 (see page 14-200)
• P1734 (see page 14-201)

Go to step 5.

5. 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).

6. Test-drive the vehicle with the shift lever in D, and

let the transmission shift through all five gears.

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

If the PCM was updated, substitute a known-

good PCM (see page 11-7). If the PCM was
substituted, go to step 1.

Go to step 8.

8. Monitor the OBD STATUS for P0780 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 7,
go to the indicated DTC’s troubleshooting.

If the PCM was updated and HDS indicates

FAILED, substitute a known-good PCM (see page
11-7), then go to step 6. If the PCM was substituted,
go to step 1. If the HDS indicates NOT COMPLETED,
go to step 6.

Ar e ther e other DT Cs?

Is DT C P07 80 indicated?

Does the HDS indicate PASSED?

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DTC P0796:

DTC P0797:

YES

14-139

A/T Clutch Pressure Control

Solenoid Valve C Stuck OFF

A/T Clutch Pressure Control

Solenoid Valve C Stuck ON

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).

1. Warm up the engine to normal operating

temperature (the radiator fan comes on).

2. Make sure that the transmission is filled to the

proper level, and check for fluid leaks.

3. Drain the ATF (see step 3 on page 14-232) through a

strainer. Inspect the strainer for metal debris or
excessive clutch material.

Replace the transmission, then go to step 13.

Replace the ATF (see page 14-232), then go to

step 4.

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

5. Clear the DTC with the HDS.

6. Test-drive the vehicle with the shift lever in D, and

let the transmission shift through all five gears.

7. Monitor the OBD STATUS for P0796 or P0797 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. If the HDS
indicates NOT COMPLETED, go to step 6.

8. Clear the DTC with the HDS.

9. Select Clutch Pressure Control (Linear) Solenoid

Valve C in the Miscellaneous Test Menu, and test
A/T clutch pressure control solenoid valve C with
the HDS.

Intermittent failure, the system is OK at this

time.

Follow the instructions indicated on the HDS

according to the test result, if the HDS has not
determined the cause of the failure, go to step 10. If
any part was replaced, go to step 11.

10. Inspect A/T clutch pressure control solenoid valve

C (see page 14-224).

Repair the hydraulic system related to shift

valves B and C, or replace the transmission, then
go to step 13.

Replace A/T clutch pressure control solenoid

valve C (see page 14-226), then go to step 11.

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

12. Clear the DTC with the HDS.

13. Test-drive the vehicle with the shift lever in D, and

let the transmission shift through all five gears.

Does the str ainer have metal debr is or excessive
clutch mater ial?

Does the HDS indicate F AILED?

Does the HDS indicate NORMAL?

Does A/ T clutch pr essur e contr ol solenoid valve C
wor k pr oper ly?

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−

YES

DTC P0842:

14-140

Automatic Transmission

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

Go to step 8.

Go to step 15.

15. Monitor the OBD STATUS for P0796 or P0797 in the

DTCs MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 14,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, go to step 8. If

the HDS indicates NOT COMPLETED, go to step 13.

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

the HDS when not in 2nd gear.

Go to step 4.

Go to step 7.

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

operating temperature (the radiator fan comes on).

5. Test-drive the vehicle in 4th gear with the shift lever

in D for at least 2 seconds.

6. Monitor the OBD STATUS for P0842 in the DTCs

MENU with the HDS.

Go to step 7.

If the HDS indicates PASSED, intermittent

failure, the system is OK at this time. Check for
intermittent short to body ground in the wire
between the 2nd clutch transmission fluid pressure
switch and the PCM. If the HDS indicates NOT
COMPLETED, go to step 3.

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

8. Disconnect the 2nd clutch transmission fluid

pressure switch connector.

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

Short in 2nd Clutch Transmission

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

Is DT C P07 96 or P07 97 indicated?

Does the HDS indicate PASSED?

Is the 2nd Pr essur e Switch OF F ?

Does the HDS indicate F AILED?

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