Acura CSX. Manual — part 261
SNR9AA1K77100090734FAAT00
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DTC P0734:
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
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
SNR9AA1K77100090735FAAT00
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YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
DTC P0735:
14-126
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
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YES
NO
YES
NO
YES
NO
YES
NO
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
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.
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
SNR9AA1K77100090741FAAT00
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DTC P0741:
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
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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