Automatic Transmission
DTC P0706: Open in Transmission Range Switch CircuitNOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Clear the DTC with the HDS.
2. Raise the vehicle on a lift, make sure it is securely supported, and allow all four wheels to rotate freely.
3. 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, stop the wheels, and turn the ignition switch to LOCK (0).
4. Restart the engine, and run it in D until the vehicle speed reaches 25 mph (40 km/h), then slow down and stop the wheels.
5. Verify the ATP FWD input with the HDS in the A/T data list while the shift lever is in D and S.
Is ATP FWD ON in both D and S?
YES - Intermittent failure, the system is OK at this time.
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. 6 to body ground with a jumper wire. Turn the ignition switch to ON (II), and verify the ATP FWD input in the A/T data list.
Is ATP FWD ON?
YES - Go to step 9.
NO - Repair open in the wire between PCM connector terminal B28 and the transmission range switch, then go to step 11.
9. Turn the ignition switch to LOCK (0).
10. Check for continuity between transmission range switch connector terminal No. 5 and body ground.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between the transmission range switch and ground (G101), or repair poor ground (G101), then go to step 17.
11. Inspect the transmission range switch.
Is the switch OK?
YES - Connect the transmission range switch connector, then go to step 12.
NO - Replace the transmission range switch, then go to step 17.
12. Update the A/T software in the PCM if it does not have the latest software, or substitute a known-good PCM.
13. Run the engine in D until the vehicle speed reaches 30 mph (48 km/h), then slow down, stop the wheels, and turn the ignition switch to LOCK (0).
14. Restart the engine, and run it in D until the vehicle speed reaches 30 mph (48 km/h), then slow down and stop the wheels.
15. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu 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, then recheck. If the PCM was substituted, go to step 1.
NO - Go to step 16.
16. 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. If any other DTCs were indicated on step 15, go to the indicated DTC's troubleshooting.
NO - 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, then recheck. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 13 and recheck.
17. Clear the DTC with the HDS.
18. Run the engine in D until the vehicle speed reaches 30 mph (48 km/h), then slow down, stop the wheels, and turn the ignition switch to LOCK (0).
19. Restart the engine, and run it in D until the vehicle speed reaches 30 mph (48 km/h), then slow down and stop the wheels.
20. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu 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 21.
21. 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 20, go to the indicated DTC's troubleshooting.
NO - 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 18 and recheck.