DTC P1840 (CVT (ECM/Pcm))
DTC P1840 : CVT Speed Sensor Circuit Forward Rotation Range/Performance
NOTE:
- Before you troubleshoot, review the General Troubleshooting Information .
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P1840 CVT Speed Sensor Circuit Forward Rotation Range/Performance |
DTC (CVT)
- CVT speed sensor check
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Raise the vehicle on a lift. Make sure it is securely supported, and allow the front wheels to rotate freely.
-4. Start the engine.
-5. Enter the VSA maintenance mode .
-6. Test-drive the vehicle in D position/mode, while monitoring the Direction of Secondary-shaft Rotation in the Data List with the HDS.
-7. Check the parameter below with the HDS.
Signal Current conditions Values Unit Direction of Secondary-shaft Rotation Does the HDS indicate forward?
YES
The CVT speed sensor is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the original PCM .
NO