DTC Troubleshooting: P1731 (45-3)

DTC P1731:  Problem in Shift Control System:


NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.

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

Does the strainer contain metal debris or excessive clutch material?


YES - Replace the transmission.n


NO - Replace the ATF, then go to 4.


4.Clear the DTC with the HDS.

5.Test-drive the vehicle in the D position through all five gears at speeds over 20 km/h (12 mph) for more than 20 seconds, then slow down to a stop.

6.Retest-drive the vehicle in the D position through all five gears at speeds over 20 km/h (12 mph) for more than 20 seconds, then slow down to a stop.

7.Monitor the OBD status for P1731 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate FAILED?


YES - Go to 8.


NO - Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETED, return to 5 and recheck.n

8.Clear the DTC with the HDS.

9.Choose Shift Solenoid E in Miscellaneous Test Menu, and check that the shift solenoid valve E operates with the HDS.

Is a clicking sound heard?


YES - Go to 10.


NO - Replace shift solenoid valve E, then go to 12.


10.Choose Clutch Pressure Control (Linear) Solenoid A in Miscellaneous Test Menu, and test the A/T clutch pressure control solenoid valve A with the HDS.

Is the system OK?


YES - Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETED, return to 10 and recheck.n


NO - Follow instructions indicated on the HDS by the test result, but if the tester has not determined the cause of the failure, go to 11. If any part was replaced, go to 12.


11.Inspect A/T clutch pressure control solenoid valve A.

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


YES - Repair hydraulic system related with shift valve E, or replace the transmission, then go to 12.


NO - Replace A/T clutch pressure control solenoid valve A, then go to 12.

12.Clear the DTC with the HDS.

13.Test-drive the vehicle in the D position through all five gears at speeds over 20 km/h (12 mph) for more than 20 seconds, then slow down to a stop.

14.Retest-drive the vehicle in the D position through all five gears at speeds over 20 km/h (12 mph) for more than 20 seconds, then slow down to a stop.

15.Monitor the OBD status for P1731 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the result indicate PASSED?


YES - Troubleshooting is complete.n


NO - Return to 8 and recheck.