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 with the HDS, 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. Block the rear wheels and raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely, or raise the vehicle on a lift.

4. 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 25 mph (40 km/h), then slow down, and stop the wheels.

5. Verify the ATPFWD input with the HDS in the A/T Data List while the shift lever is in D, D3, and 2.

Is ATPFWD ON in all D, D3, and 2?
YES - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the transmission range switch and the PCM.

NO - Go to step 6.


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

7. Disconnect the transmission range switch connector.

8. Connect the transmission range switch connector terminal No. 5 to body ground with a jumper wire. Turn the ignition switch to ON (II), and verify the ATPFWD input in the A/T Data List.

Is ATPFWD ON?
YES - Disconnect the jumper wire, and go to step 9.

NO - Disconnect the jumper wire, and repair open in the wire between PCM connector terminal C18 and the transmission range switch, then go to step 12.






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

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

Is there continuity?
YES - Go to step 11.

NO - Repair open in the wire between the transmission range switch and body ground (G101), or repair poor body ground (G101), then go to step 12.






11. Inspect the transmission range switch. Testing and Inspection

Is the transmission range switch OK?
YES - Connect the transmission range switch connector, then go to step 18.

NO - Replace the transmission range switch, Service and Repair then go to step 15.


12. Reconnect all connectors.

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

14. Clear the DTC with the HDS.

15. Start the engine, and run it in D until the vehicle speed reaches 25 mph (40 km/h). Slow down, and stop the wheels.

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

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

NO - Go to step 17.


17. Monitor the OBD status for P0706 in the DTCs MENU with the HDS.

Does the HDS indicate PASSED?
YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 16, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for poor connections or loose terminals between the transmission range switch and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 15.


18. Update the PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good PCM. How to Troubleshoot A/T Systems

19. Start the engine, and run it in D until the vehicle speed reaches 25 mph (40 km/h). Slow down, and stop the wheels.

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

Is DTC P0706 indicated?
YES - Check for poor connections or loose terminals between the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then go to step 19. If the PCM was substituted, go to step 1.

NO - Go to step 21.


21. Monitor the OBD status for P0706 in the DTCs MENU with the HDS.

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 Temporary DTCs or DTCs were indicated in step 20, go to the indicated DTC's troubleshooting.

NO - If the HDS indicates FAILED, check for poor connections or loose terminals between the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM, How to Troubleshoot A/T Systems then go to step 19. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 19.