DTC Troubleshooting

DTC Troubleshooting: P1746 (45), P1747 (45)

DTC P1746:

Hydraulic Control System (Cut Valve A Stuck OFF or Cut Valve B Stuck ON)

DTC P1747:

Hydraulic Control System (Cut Valve A Stuck ON or Cut Valve B Stuck OFF)

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information How To Troubleshoot The A/T System.
- This code is stored simultaneously with DTC P1780, which is caused by a hydraulic control system problem (DTC P1746 and P1747).

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 have metal debris or excessive clutch material?

YES -

Replace the transmission, then go to step 7.

NO -

Replace the ATF, then go to step 4.

4. Clear the DTC with the HDS.

5. Test-drive the vehicle with the shift lever in D for at least 3 seconds, and let the transmission shift through all five gears. Then slow down to a stop.

6. Monitor the OBD status for P1746 or P1747 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?

YES -

Repair cut valve A in the servo body Servo Body Disassembly, Inspection, And Reassembly, repair cut valve B in the main valve body Main Valve Body Disassembly, Inspection, And Reassembly, or replace the main valve body or servo body, or replace the transmission, then go to step 7.

NO -

Intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, return to step 5 and recheck.

7. Test-drive the vehicle with the shift lever in D for at least 3 seconds, and let the transmission shift through all five gears. Then slow down to a stop.

8. Monitor the OBD status for P1746 or P1747 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES -

Troubleshooting is complete.

NO -

Clear the DTC with the HDS and recheck. If the HDS indicates NOT COMPLETED, return to step 4 and recheck.