Case IH 4372: Swashplate angle sensor - out of range high

The control module is receiving a voltage or signal from the sensor that exceeds the maximum programmed threshold. This typically indicates an electrical issue such as a short circuit to power, an open circuit, a failed sensor, or a mechanical issue where the swashplate has physically traveled beyond its normal operating limit.

• Steiger T4B

1. 1

   Inspect the sensor wiring harness and connectors (often located on the bottom of the hydrostatic pump and protected by steel covers) for damage, corrosion, or loose pins.

2. 2

   Check the circuit for a short to battery power or an open circuit, which are the primary electrical causes of an 'out of range high' reading.

3. 3

   Verify the battery voltage, as extremely high or low system voltage can sometimes trigger false sensor readings.

4. 4

   Inspect the hydrostatic pump and swashplate linkage for mechanical binding or damage that might force the swashplate out of its normal position.

1. 1

   Safely park the machine, turn off the engine, and relieve hydraulic pressure.

   Safely park the machine, turn off the engine, and relieve hydraulic pressure.

2. 2

   Locate the swashplate angle sensor on the hydrostatic pump.

   Locate the swashplate angle sensor on the hydrostatic pump (often under a protective steel cover).

3. 3

   Disconnect the electrical connector from the sensor.

   Disconnect the electrical connector from the sensor.

4. 4

   Remove the mounting bolts securing the sensor to the pump housing.

   Remove the mounting bolts securing the sensor to the pump housing.

5. 5

   Install the new swashplate angle sensor.

   Install the new swashplate angle sensor.

6. 6

   Tighten the mounting bolts to the specified torque.

   Tighten the mounting bolts to the specified torque (for reference, similar hydrostatic pump sensors require a low torque, such as 27.4 in.-lb / 3.1 N•m).

7. 7

   Reconnect the electrical harness and reinstall any protective covers.

   Reconnect the electrical harness and reinstall any protective covers.

8. 8

   Clear the fault codes and test the machine's hydrostatic functions.

   Clear the fault codes and test the machine's hydrostatic functions to ensure the code does not return.