DTC Troubleshooting: P1844
DTC P1844: CVT Input Shaft 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
P1844 CVT Input Shaft Speed Sensor Circuit Forward Rotation Range/Performance
      

1.
CVT drive pulley speed sensor check:

CVT drive pulley 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 Drive Pulley Rotation in the Data List with the HDS.

?7.
Check the parameter below with the HDS.
Signal
Current conditions
Values
Unit
Direction of Drive Pulley Rotation
    

Does the HDS indicate forward?

     
YES
     
     
     
The CVT drive pulley 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