What this code means
P0706 may mean the ECM/PCM is not seeing the expected transmission range switch signal in the range switch circuit.
What the vehicle may do
- The vehicle may show range indication issues or shift-related behavior.
- The fault may be intermittent if the code does not return during verification.
Possible fault areas
- Possible transmission range switch fault.
- Possible connector or wiring issue in the range switch circuit.
- Possible PCM-side circuit or software concern.
Diagnostic path
Opening and context
On this 2010 to 2016 Honda CR-V with the 2.4 gas engine, P0706 is for a transmission range switch open condition in the ECM/PCM range switch circuit. In plain language, the computer may not be seeing the expected range-switch signal. The vehicle may have range indication or shift-related behavior, and possible fault areas can include the transmission range switch, its connector and wiring, or the PCM side of the circuit. Before getting deep into testing, start with the basic system checks. Also keep this in mind: this code is an electrical circuit problem. It is not caused by a mechanical problem inside the transmission.
Verify the problem first
Start by making sure the shift cable is properly adjusted. Then turn the vehicle to the ON mode and clear the DTC with the HDS. Test-drive the vehicle in D position or mode until vehicle speed reaches 37 mph (60 km/h), then slow down to 6 mph (10 km/h). Turn the engine off, then repeat that same test-drive again. After that, check for Pending or Confirmed DTCs with the HDS. If P0706 is indicated, the failure is duplicated and you move into circuit testing. If P0706 is not indicated, treat it as an intermittent failure and the system is OK at this time. If the captured data is available, try to reproduce the failure under the same conditions.
Simulate the forward switch input
With the failure duplicated, turn the vehicle to the OFF (LOCK) mode. Disconnect the transmission range switch 10P connector. Then connect transmission range switch 10P connector No. 6 to body ground with a jumper wire. Turn the vehicle back to the ON mode and watch the Forward Switch parameter with the HDS. The threshold you are looking for is ON. If the current condition matches that threshold, the next move is the transmission range switch. If it does not match the threshold, continue to the ATP-FWD wire check.
Check the ATP-FWD line for an open
For the open-wire check, turn the vehicle to the OFF (LOCK) mode and remove the jumper wire. Use the HDS to jump the SCS line, then wait more than 1 minute. Disconnect PCM connector C, the 51P connector. Now check continuity between transmission range switch 10P connector No. 6 and PCM connector C, 51P, No. 26. The vehicle is still in OFF (LOCK) mode, the transmission range switch 10P connector is disconnected, and PCM connector C is disconnected for this check.
Use the result to choose the next move
If there is no continuity, repair the open in the ATP-FWD wire between the transmission range switch and the PCM. If there is continuity, the ATP-FWD wire is OK. At that point, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If P0706 goes away after the PCM update, troubleshooting is complete. If P0706 goes away with the known-good PCM substituted, replace the original PCM.
Verify and close
Keep verification separate from the testing. After the repair path is completed, verify the repair and confirm the code stays gone. The key here is not to chase a mechanical transmission fault for P0706. Prove the switch input, prove the ATP-FWD wire, and only then move toward the PCM side of the circuit. For more diagnostic training, visit stepdiagnostics.com.
Final check
P0706 on this vehicle is handled as an electrical range-switch circuit diagnosis, not as an internal mechanical transmission diagnosis.
For more guided automotive diagnostics, visit STEP Diagnostics.
