DTC Troubleshooting

DTC Troubleshooting: P0706 (6)

DTC P0706: Open in Transmission Range Switch Circuit

NOTE:

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

- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.

4. Start the engine, disable the VSA by pressing the VSA OFF switch, run the vehicle in D until the vehicle speed reaches 30 mph (48 km/h), then slow down and stop the wheels.

5. Monitor the OBD STATUS for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?
YES - Go to step 6.

NO - If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmission range switch and the PCM. If the HDS indicates NOT COMPLETED, return to step 4 and recheck.


6. Turn the ignition switch to LOCK (0).

7. Inspect the transmission range switch. Transmission Range Switch Test

Is the switch OK?
YES - Go to step 8.

NO - Replace the transmission range switch, Transmission Range Switch Replacement then go to step 27.


8. Shift to D, and check the Forward Switch (ATPFWD) and A/T D Switch inputs with the HDS in the A/T data list.

Is the Forward Switch (ATPFWD) and the A/T D Switch ON?
YES - Go to step 9.

NO - Go to step 13.


9. Shift to D3, and check the Forward Switch (ATPFWD) and the A/T D3 Switch inputs with the HDS in the A/T data list.

Is the Forward Switch (ATPFWD) and A/T D3 Switch ON?
YES - Go to step 10.

NO - Go to step 13.


10. Clear the DTC with the HDS.

11. Start the engine, and turn the VSA off (the light on the VSA OFF switch comes on). Run the engine in D until the vehicle speed reaches 30 mph (48 km/h), then slow down and stop the wheels.

12. Monitor the OBD STATUS for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?
YES - Go to step 13.

NO - If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmission range switch and the PCM. If the HDS indicates NOT COMPLETED, return to step 11 and recheck.


13. Turn the ignition switch to LOCK (0).

14. Disconnect the transmission range switch connector.

15. Check for continuity between transmission range switch connector terminal No. 6 and body ground.

Is there continuity?
YES - Go to step 16.

NO - Repair open in the wire between the transmission range switch and ground (G101), or repair poor ground (G101), then go to step 27.






16. Turn the ignition switch to ON (II).

17. Measure the voltage between transmission range switch connector terminals No. 5 and No. 6.

Is there voltage?
YES - Go to step 18.

NO - Repair open in the wire between the transmission range switch and PCM connector terminal C18, then go to step 27.






18. Measure the voltage between transmission range switch connector terminals No. 6 and No. 9.

Is there voltage?
YES - Go to step 19.

NO - Repair open in the wire between the transmission range switch and PCM connector terminal C17, then go to step 27.






19. Measure the voltage between transmission range switch connector terminals No. 4 and No. 6.

Is there voltage?
YES - Go to step 20.

NO - Repair open in the wire between the transmission range switch and PCM connector terminal C46, then go to step 27.






20. Reconnect all connectors.

21. Update the A/T software in the PCM if it does not have the latest software, Service and Repair or substitute a known-good PCM. How to Troubleshoot A/T Systems

22. Turn the ignition switch to LOCK (0).

23. Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.

24. Start the engine, and turn the VSA off (the light on the VSA OFF switch comes on). Run the engine in D until the vehicle speed reaches 31 mph (50 km/h), then slow down and stop the wheels.

25. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0706 indicated?
YES - Check for poor connections and loose terminals at the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then recheck. If the PCM was substituted, go to step 1.

NO - Go to step 23.


26. Monitor the OBD STATUS for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. Service and Repair If any other DTCs were indicated on step 25, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for poor connections and loose terminals at the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 22 and recheck.


27. Clear the DTC with the HDS.

28. Turn the ignition switch to LOCK (0).

29. Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.

30. Start the engine, and turn the VSA off (the light on the VSA OFF switch comes on). Run the engine in D until the vehicle speed reaches 31 mph (50 km/h), then slow down and stop the wheels.

31. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0706 indicated?
YES - Check for poor connections and loose terminals at the transmission range switch and the PCM, then go to step 1.

NO - Go to step 32.


32. Monitor the OBD STATUS for P0706 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated on step 31, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for poor connections and loose terminals at the transmission range switch and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 28 and recheck.