Content .. 964 965 966 967 ..

Acura TSX / Honda Accord CL. Manual - part 966

Did the result indicate a pass?

YES: The problem has been corrected.

NO: Return to step 1 and recheck.

DTC P0780: SHIFT CONTROL SYSTEM

1. Check for other DTCs indicated simultaneous with the code P0780.

2. Perform the troubleshooting flowchart for the indicated codes:

P1730: (see DTC P1730: PROBLEM IN SHIFT CONTROL SYSTEM ).

P1731: (see DTC P1731: PROBLEM IN SHIFT CONTROL SYSTEM ).

P1732: (see DTC P1732: PROBLEM IN SHIFT CONTROL SYSTEM ).

P1733: (see DTC P1733: PROBLEM IN SHIFT CONTROL SYSTEM ).

P1734: (see DTC P1734: PROBLEM IN SHIFT CONTROL SYSTEM ).

DTC P0796: A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C STUCK OFF

1. Warm up the engine to normal operating temperature (the radiator fan comes on).

2. Check to be sure that the transmission is filled to the proper level, and check for fluid leaks.

3. Drain the ATF (see DRAINING & REFILLING ) through a strainer. Inspect the ATF and strainer for

metal debris or burnt fluid.

Has the ATF deteriorated?

YES: Replace ATF (see DRAINING & REFILLING ), and go to step 4.

NO: Go to step 8 .

4. Clear the DTC with the HDS.

NOTE:

Record all freeze data and review General Troubleshooting Information (see
GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.

NOTE:

P0780 means there is one or more A/T DTCs about the shift control
system.

Are there other DTCs?

YES: Go to step 2.

NO: Update the PCM if it does not have the latest software, or
substitute a known-good PCM (see PCM UPDATING &
SUBSTITUTION FOR TESTING ), then recheck. If the
symptom/indication goes away with a known-good PCM,
replace the original PCM.

NOTE:

Record all freeze data and review General Troubleshooting Information (see
GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

5. Test-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than 20

seconds, then slow down to a stop.

6. Retest-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than

20 seconds, then slow down to a stop.

7. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0796.

Did the result indicate a fail?

YES: Go to step 8.

NO: Intermittent failure, the system is OK at this time. If the tester indicates NOT
COMPLETE, return to step 5 and recheck.

8. Clear the DTC with the HDS.

9. Select LINEAR SOL TEST in MISC. TEST MENU, then carry out LINEAR SOL C TEST in LINEAR

SOL TEST MENU with the HDS.

Is the system OK?

YES: Intermittent failure, the system is OK at this time. If the tester indicates NOT
COMPLETE, return to step 9 and recheck.

NO: Follow instructions indicated on the HDS by the test result, but the tester 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 A/T CLUTCH PRESSURE CONTROL

SOLENOID VALVE B & C TEST ).

Does the A/T clutch pressure control solenoid valve C work properly?

YES: Repair hydraulic system related with shift valve B and C, or replace the transmission,
then go to step 11.

NO: Replace A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE
CONTROL SOLENOID VALVE B & C REPLACEMENT ), then go to step 11.

11. Clear the DTC with the HDS.

12. Test-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than 20

seconds, then slow down to a stop.

13. Retest-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than

20 seconds, then slow down to a stop.

14. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0796.

Did the result indicate a pass?

YES: The problem has been corrected.

NO: Return to step 1 and recheck.

DTC P0797: A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C STUCK ON

1. Warm up the engine to normal operating temperature (the radiator fan comes on).

2. Check to be sure that the transmission is filled to the proper level, and check for fluid leaks.

NOTE:

Record all freeze data and review General Troubleshooting Information (see
GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

3. Drain the ATF (see DRAINING & REFILLING ) through a strainer. Inspect the ATF and strainer for

metal debris or burnt fluid.

Has the ATF deteriorated?

YES: Replace ATF (see DRAINING & REFILLING ), and go to step 4.

NO: Go to step 8 .

4. Clear the DTC with the HDS.

5. Test-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than 20

seconds, then slow down to a stop.

6. Retest-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than

20 seconds, then slow down to a stop.

7. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0797.

Did the result indicate a fail?

YES: Go to step 8.

NO: Intermittent failure, the system is OK at this time. If the tester indicates NOT
COMPLETE, return to step 5 and recheck.

8. Clear the DTC with the HDS.

9. Select LINEAR SOL TEST in MISC. TEST MENU, then carry out LINEAR SOL C TEST in LINEAR

SOL TEST MENU with the HDS.

Is the system OK?

YES: Intermittent failure, the system is OK at this time. If the tester indicates NOT
COMPLETE, return to step 9 and recheck.

NO: Follow instructions indicated on the HDS by the test result, but the tester 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 A/T CLUTCH PRESSURE CONTROL

SOLENOID VALVE B & C TEST ).

Does the A/T clutch pressure control solenoid valve C work properly?

YES: Repair hydraulic system related with shift valves B and C, or replace the transmission,
then go to step 11.

NO: Replace A/T clutch pressure control solenoid valve C (see A/T CLUTCH PRESSURE
CONTROL SOLENOID VALVE B & C REPLACEMENT ), then go to step 11.

11. Clear the DTC with the HDS.

12. Test-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than 20

seconds, then slow down to a stop.

13. Retest-drive the vehicle in the D position in all five gears at speeds over 12 mph (20 km/h) for more than

20 seconds, then slow down to a stop.

14. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0797.

Did the result indicate a pass?

YES: The problem has been corrected.

NO: Return to step 1 and recheck.

DTC P0812: OPEN IN TRANSMISSION RANGE SWITCH ATP RVS SWITCH CIRCUIT

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

1. Turn the ignition switch ON (II).

2. Shift to the R position, and verify the A/T R SWITCH signal with the HDS in the A/T data list.

Is the A/T R SWITCH ON?

YES: Go to step 3.

NO: Inspect the end of the selector control shaft (see step 6 of TRANSMISSION RANGE
SWITCH TEST ), adjust the shift cable (see SHIFT CABLE ), then recheck. If problem
still exists, go to step 4 .

3. Check the REVERSE SWITCH signal with the HDS.

Is the REVERSE SWITCH ON?

YES: Intermittent failure, the system is OK at this time. Check for poor connections or loose
terminals at the transmission range switch and PCM.

NO: Go to step 4.

4. Turn the ignition switch OFF.

5. Check for continuity between PCM connector terminals A8 and body ground, and between A9 and body

ground.

Is there continuity?

YES: Go to step 6.

NO: Repair open in the wires between PCM connector terminals A8, A9, and ground
(G101), and repair poor ground (G101), then go to step 12 .

NOTE:

Record all freeze data and review General Troubleshooting Information
(see GENERAL TROUBLESHOOTING INFORMATION ) before you
troubleshoot.

This code is caused by an electrical circuit problem and cannot be caused
by a mechanical problem in the transmission.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Content .. 964 965 966 967 ..