DTC P0731, P0732, P0733, P0734, P0751, P0756, P1751, P1756 [LA4AX-EL (CD4E)]

id0502a3806400

DTC P0731

Gear 1 incorrect

DTC P0732

Gear 2 incorrect

DTC P0733

Gear 3 incorrect

DTC P0734

Gear 4 incorrect

DTC P0751

Shift solenoid A circuit malfunction

DTC P1751

DTC P0756

Shift solenoid B circuit malfunction

DTC P1756

DETECTION CONDITION

• P0731: Does not shift to 1st gear while driving
• P0732: Does not shift to 2nd gear while driving
• P0733: Does not shift to 3rd gear while driving
• P0734: Does not shift to 4th gear while driving
• P0751, P1751: Malfunction in shift solenoid A mechanical or oil pressure systems.
• P0756, P1756: Malfunction in shift solenoid B mechanical or oil pressure systems.

POSSIBLE CAUSE

• Shift solenoid valve A malfunction
• Shift solenoid valve B malfunction
• Transaxle internal malfunction
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related Service Bulletins and or/on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
No
Go to the next step.
2

VERIFY DTCS

• Turn the ignition switch to the LOCK position, then to the ON position.
• Verify the DTCs in the PCM memory.
• Are except DTCs P0731, P0732, P0733, P0734, P0751, P0756, P1751 and P1756 output?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
3

Shift solenoid operation inspection

• Drive in D range.
• Connect the WDS or equivalent to the DLC-2 and select the following PIDS.
- SSA/SS1
- SSB/SS2
• Using the WDS or equivalent, verify the operation status of shift solenoid A and shift solenoid B while driving.
- 1GR: SSA/SS1 on, SSB/SS2 on
- 2GR: SSA/SS1 off, SSB/SS2 on
- 3GR: SSA/SS1 off, SSB/SS2 off
- 4GR: SSA/SS1 on, SSB/SS2 off
• Is the shift solenoid operation normal?
Yes
Go to the next step.
No
Replace the solenoid body assembly, then go to Step 8.
4

INSPECT ROAD TEST

• Road-test the vehicle to verify the respective shift points.
• Are the shift points normal?
Yes
Go to the next step.
No
Inspect the symptom troubleshooting, then go to the next step.
5

VERIFY TROUBLESHOOTING OF DTC P0731, P0732, P0733, P0734, P0751, P0756, P1751 OR P1756 COMPLETED

• Make sure to reconnect all the disconnected connectors.
• Clear the DTC using the WDS or equivalent.
• Start the engine.
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
6
VERIFY DTCS
• Are except DTCs P0731, P0732, P0733, P0734, P0751, P0756, P1751 and P1756 output?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.