Case IH 2431 – CCU: Creeper switch voltage too high

The control unit detects a voltage signal from the creeper switch circuit that exceeds the expected normal operating range. This typically indicates a short to +12V or an open circuit in the switch's wiring harness.

• Farmall
• Magnum series
• Maxxum series
• Puma series

1. 1

   Verify the physical adjustment and mechanical operation of the creeper rocker switch

2. 2

   Check the wiring from the CCU to the switch for an open circuit

3. 3

   Check the other side of the switch for +12V with the ignition turned on

4. 4

   Attempt a creeper calibration (Start engine, press clutch and brake, select Forward, release hand brake, press creeper switch, slowly release clutch)

5. 5

   Verify that the tractor has the correct level of software downloaded if calibration fails, then recalibrate

1. 1

   Access the Switch

   Remove the necessary cab trim/shroud to access the creeper switch and its wiring harness.

2. 2

   Repair Wiring

   If the diagnostic checks revealed an open circuit or a short to +12V in the harness between the CCU and the switch, repair or replace the damaged wiring.

3. 3

   Replace the Switch

   If the wiring is intact and receives +12V but the switch fails operational checks, remove and replace the faulty creeper rocker switch.

4. 4

   Reassemble

   Reinstall all panels and brackets.

5. 5

   Calibrate

   Perform the creeper transmission calibration procedure (engaging and disengaging the creeper while driving) to clear the fault code and ensure the CCU recognizes the new switch.