DTC Troubleshooting

DTC Troubleshooting: P1743 (45), P1744 (45)

DTC P1743:

Problem in Shift Control System; Shift Valve E Stuck OFF

DTC P1744:

Problem in Shift Control System; Shift Valve E Stuck ON

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.

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 9.

NO -

Replace the ATF, then go to step 4.

4. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

5. Clear the DTC with the HDS.

6. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears. Slow down, and stop the wheels.

7. Monitor the OBD status for P1743 or P1744 in the DTCs MENU with the HDS.

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 9.

NO -

If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, go to step 6.

8. Clear the DTC with the HDS.

9. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears. Slow down, and stop the wheels.

10. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P1743 or P1744 indicated?

YES -

Go to step 5.

NO -

Go to step 11.

11. Monitor the OBD status for P1743 or P1744 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?

YES -

Troubleshooting is complete.�

NO -

If the HDS indicates FAILED, go to step 8. If the HDS indicates NOT COMPLETED, go to step 9.