DTC Troubleshooting

DTC Troubleshooting: P1743 (45)

DTC P1743: Problem in Shift Control System; Shift Valve E Stuck OFF

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information. How to Troubleshoot A/T Systems

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 ATF Replacement 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, ATF Replacement then go to step 4.


4. Clear the DTC with the HDS.

5. Test-drive the vehicle for several minutes with the shift lever in D, and let the transmission shift through all five gears.

6. Monitor the OBD STATUS for P1743 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?
YES - Repair shift valve E in the main valve body, Main Valve Body Disassembly, Inspection, and Reassembly replace the main valve 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 for several minutes with the shift lever in D, and let the transmission shift through all five gears.

8. Monitor the OBD STATUS for P1743 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?
YES - Troubleshooting is complete.

NO - Return to step 7.