Case IH 2069 – CCU: Wheel Speed Sensor Voltage too Low

The control module is receiving a voltage signal from the wheel speed sensor that falls below the acceptable operating threshold. This condition typically indicates an open circuit, a short to ground in the sensor's wiring harness, or an internal failure of the sensor itself.

• Farmall
• MX Series
• MX100
• MX110
• MX120
• TG Series
• Puma Series
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• Puma 225 CVX
• Steiger

1. 1

   Verify that fault code 2069 is currently present and active in the system.

2. 2

   Inspect the wheel speed sensor, its electrical connector, and the wiring harness for visible damage, corrosion, or loose pins.

3. 3

   Use a multimeter to check the sensor wiring harness for an open circuit or a short to ground, which are the primary causes of a voltage too low reading.

4. 4

   Verify that the control module is sending the correct reference voltage (typically 5 volts) to the sensor.

1. 1

   Power Down

   Turn off the machine and disconnect the battery to prevent electrical shorts during the repair.

2. 2

   Locate the Sensor

   Locate the affected wheel speed sensor (often mounted on the transmission housing, final drive, or wheel hub, depending on the tractor model).

3. 3

   Disconnect

   Unplug the electrical connector from the sensor.

4. 4

   Wiring Repair (If Applicable)

   If your diagnostic tests revealed a short or break in the wiring harness, repair the damaged wires or replace the harness section.

5. 5

   Sensor Replacement

   If the wiring is intact and the sensor is deemed faulty, remove the retaining bolt(s) holding the sensor in place and pull the old sensor out.

6. 6

   Install New Sensor

   Insert the new OEM wheel speed sensor and tighten the retaining hardware.

7. 7

   Reconnect

   Plug the electrical connector back into the new sensor.

8. 8

   Test

   Reconnect the battery, clear the active fault codes from the CCU/Transmission module, and operate the tractor to ensure the code does not return and speed registers correctly.