Case IH 2281 – ZDC: CAN Message ExtSwitch00 / ServiceBrakeSwitchLeftState Error or Unavailable

Controller Area Network (CAN) communication issue where the 'ExtSwitch00' message containing the 'ServiceBrakeSwitchLeftState' (Left Service Brake Switch State) is either reporting an error or is completely unavailable to the module expecting the data.

• Steiger T4B
• Case IH Steiger AFS Connect CVT
• Case IH Steiger 420 / 2018+ models
• Case IH Maxxum CVX
• Case IH Puma CVX series

1. 1

   Verify the physical operation of the left service brake pedal switch.

2. 2

   Check the wiring harness and connectors between the left brake switch and the module responsible for broadcasting its state on the CAN bus.

3. 3

   Check for other active CAN bus communication codes that might indicate a broader network failure rather than an isolated switch failure.