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Acura CSX. Manual - part 261

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−

DTC P0734:

YES

14-125

Problem in 4th Clutch and 4th

Clutch Hydraulic Circuit (4th Gear Incorrect
Ratio)

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 11.

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

step 4.

4. Measure the line pressure (see page 14-211).

Go to step 5.

Repair the ATF pump and the regulator valve,

or replace the transmission, then go to step 11.

5. Measure the 4th clutch pressure (see page 14-211).

Go to step 6.

Shift valves B and C, and the servo control

valve are stuck. Repair these valves and the
hydraulic circuit, or replace the transmission, then
go to step 11.

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

7. Clear the DTC with the HDS.

8. Test-drive the vehicle in 4th gear, with the shift

lever in D, at speeds over 12 km/h (7 mph), and
with the engine speed above 1,000 rpm, for at least
12 seconds.

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

Repair the 4th clutch, or replace the

transmission, then go to step 11.

Go to step 10.

10. Monitor the OBD STATUS for P0734 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 9,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, repair the 4th

clutch, or replace the transmission, then go to step
11. If the HDS indicates NOT COMPLETED, go to
step 8.

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

Is the line pr essur e within the ser vice limits?

Is the 4th clutch pr essur e within the ser vice
limits?

Is DT C P07 34 indicated?

Does the HDS indicate PASSED?

08/08/21 14:42:31 61SNR030_140_0127

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−

YES

DTC P0735:

14-126

Automatic Transmission

11. Test-drive the vehicle in 4th gear, with the shift

lever in D, at speeds over 12 km/h (7 mph), and
with the engine speed above 1,000 rpm, for at least
12 seconds.

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

Check for poor connections or loose

terminals between the input shaft (mainshaft)
speed sensor and the output shaft (countershaft)
speed sensor and the PCM, then go to step 4.

Go to step 13.

13. Monitor the OBD STATUS for P0734 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 12,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for poor

connections or loose terminals between the input
shaft (mainshaft) speed sensor and the output shaft
(countershaft) speed sensor and the PCM, then go
to step 4. If the HDS indicates NOT COMPLETED, go
to step 11.

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 11.

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

step 4.

4. Measure the line pressure (see page 14-211).

Go to step 5.

Repair the ATF pump and the regulator valve,

or replace the transmission, then go to step 11.

5. Measure the 5th clutch pressure (see page 14-211).

Go to step 6.

Shift valves A, B, and/or D are stuck. Repair

these valves and the hydraulic circuit, or replace
the transmission, then go to step 11.

Problem in 5th Clutch and 5th

Clutch Hydraulic Circuit (5th Gear Incorrect
Ratio)

Is DT C P07 34 indicated?

Does the HDS indicate PASSED?

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

Is the line pr essur e within the ser vice limits?

Is the 5th clutch pr essur e within the ser vice
limits?

08/08/21 14:42:31 61SNR030_140_0128

−

YES

14-127

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

7. Clear the DTC with the HDS.

8. Test-drive the vehicle in 5th gear, with the shift

lever in D, at speeds over 12 km/h (7 mph), and
with the engine speed above 1,000 rpm, for at least
12 seconds.

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

Repair the 5th clutch, or replace the

transmission, then go to step 11.

Go to step 10.

10. Monitor the OBD STATUS for P0735 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 9,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, repair the 5th

clutch, or replace the transmission, then go to step
11. If the HDS indicates NOT COMPLETED, go to
step 8.

11. Test-drive the vehicle in 5th gear, with the shift

lever in D, at speeds over 12 km/h (7 mph), and
with the engine speed above 1,000 rpm, for at least
12 seconds.

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

Check for poor connections or loose

terminals between the input shaft (mainshaft)
speed sensor and the output shaft (countershaft)
speed sensor and the PCM, then go to step 4.

Go to step 13.

13. Monitor the OBD STATUS for P0735 in the DTCs

MENU with the HDS.

Troubleshooting is complete. If any other

Temporary DTCs or DTCs were indicated in step 12,
go to the indicated DTC’s troubleshooting.

If the HDS indicates FAILED, check for poor

Is DT C P07 35 indicated?

Does the HDS indicate PASSED?

Is DT C P07 35 indicated?

Does the HDS indicate PASSED?

08/08/21 14:42:31 61SNR030_140_0129

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DTC P0741:

YES
NO

YES

14-128

Automatic Transmission

Torque Converter Clutch

Hydraulic Circuit Stuck OFF

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. Select Shift Solenoid Valve E in the Miscellaneous

Test Menu, and check that shift solenoid valve E
operates with the HDS.

Go to step 7.

Replace shift solenoid valve E (see page

14-217), then go to step 11.

7. Run the engine until the ECT Sensor temperature

reaches 80 °C (176 °F).

8. Select Clutch Pressure Control (Linear) Solenoid

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

Go to step 9.

Follow the instructions indicated on the HDS

according to the test result. Go to step 11 if any part
was replaced.

9. Test-drive the vehicle on a level road with a steady

speed at 96 km/h (60 mph) for at least 20 seconds.

10. Monitor the OBD STATUS for P0741 in the DTCs

MENU with the HDS.

Repair the faulty torque converter clutch

mechanism, the torque converter clutch hydraulic
circuit, the lock-up shift valve, or the lock-up control
valve, or replace the transmission, then go to step
13.

If the HDS indicates PASSED, intermittent

failure, the system is OK at this time. If the HDS
indicates NOT COMPLETED, go to step 9.

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

12. Clear the DTC with the HDS.

13. Test-drive the vehicle on a level road with a steady

speed at 96 km/h (60 mph) for at least 20 seconds,
or test-drive the vehicle for several minutes under
the same condition as those indicated by the freeze
data.

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

Go to step 5.

Go to step 15.

15. Monitor the OBD STATUS for P0741 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 5. If

the HDS indicates NOT COMPLETED, go to step 13.

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

Is a clicking sound hear d?

Does the HDS indicate NORMAL?

Does the HDS indicate F AILED?

Is DT C P07 41 indicated?

Does the HDS indicate PASSED?

08/08/21 14:42:31 61SNR030_140_0130

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