Case IH 18403 – ICP (Integrated Control Panel) / EHR control module: EHR 4 Program / Motor Mode Switch: 'EHR_Mode_4Sw' CAN signal from ICP - error state

Indicates a communication or signal failure on the CAN data bus. Specifically, the system is receiving an invalid or error-state signal from the Integrated Control Panel (ICP) regarding the program/motor mode switch for the #4 Electro-Hydraulic Remote (EHR) valve. This means the tractor's computer cannot verify the position or command of the EHR 4 switch located on the armrest.

• VESTRUM CVX
• Case IH Magnum
• Case IH Puma
• Case IH Optum
• Case IH Steiger & Quadtrac

1. 1

   Check CAN Bus Communication: Verify that the ICP is communicating properly with the rest of the tractor. Other codes (such as 1013 "No communication with the ICP") may indicate a broader CAN bus failure rather than an isolated switch issue.

2. 2

   Inspect the Multicontroller Armrest: Check the physical condition of the configurable color-coded EHR 4 lever/switch on the armrest for physical damage, sticking, or debris.

3. 3

   Check Voltages: Look for related voltage codes (e.g., EHR 4 lever position voltage too high/low) which would indicate a short or open circuit in the switch's potentiometer.

4. 4

   Harness and Connector Inspection: Inspect the wiring harness and connectors between the ICP/Armrest and the EHR 4 valve module for corrosion, backed-out pins, or wire chafing.

1. 1

   Power down tractor

   Powering down the tractor and disconnecting the battery.

2. 2

   Remove armrest trim

   Removing the trim on the Multicontroller armrest to access the ICP and EHR switch modules.

3. 3

   Test switch

   Testing the EHR 4 switch continuity and resistance.

4. 4

   Replace switch or ICP

   Replacing the EHR 4 switch assembly or the ICP module if the switch is integrated and has failed internally.

5. 5

   Reassemble and clear codes

   Reassembling the armrest and clearing the fault codes via the AFS Pro monitor or dealer diagnostic tool.