Case IH 2652 (160.02) - DEC – Transmission Control Unit (TCU) or Vehicle ECU: Hydro Out Speed Sensor No Signal - Data erratic; no signal

The control module is not receiving a valid, readable signal from the hydrostatic output speed sensor (data is erratic or completely missing).

• VESTRUM CVX
• Case Vestrum CVX

1. 1

   Perform a complete key cycle (OFF/ON) to see if the sensor stall carries over or resets

2. 2

   Check the wiring harness leading to the Hydro Out Speed Sensor for chafing, bare wires, or moisture

3. 3

   Disconnect the sensor and inspect the pins for corrosion, pushed-out pins, or poor terminal tension

4. 4

   Ensure the sensor is securely mounted and that the air gap between the sensor and the tone ring/gear is correct

1. 1

   Power down

   Power down the machine and disconnect the battery to prevent short circuits.

2. 2

   Locate sensor

   Locate the Hydro Out Speed Sensor on the hydrostatic drive unit or transmission housing.

3. 3

   Clean area

   Clean the area around the sensor to prevent dirt from entering the hydraulic/transmission system.

4. 4

   Disconnect harness

   Disconnect the electrical harness connector.

5. 5

   Remove sensor

   Remove the retaining bolt(s) and carefully pull the sensor straight out of the housing.

6. 6

   Lubricate O-ring

   Lubricate the O-ring on the new sensor with clean hydraulic/transmission fluid.

7. 7

   Install sensor

   Insert the new sensor, install the retaining bolt, and torque to OEM specifications.

8. 8

   Reconnect and clear codes

   Reconnect the electrical harness, reconnect the battery, and clear the fault codes using an EST (Electronic Service Tool).