Case IH 5118-13 - UCM – UCM: Incorrect trailer brake configuration

The control module has detected a mismatch between the tractor's software configuration and the physical hardware present (e.g., the system is configured for a trailer brake valve, but one is not detected, or vice versa).

• MAGNUM AFS Connect
• Case IH Maxxum series
• Case IH Puma series
• Case IH Magnum series (e.g., MX200-270)
• Case IH Steiger / Quadtrac series
• Case IH CX and C Series (C50, C60, C70, C80, etc.)

1. 1

   Hardware Verification: Physically inspect the rear of the tractor and the hydraulic/pneumatic circuits to verify if a trailer brake valve is actually installed on the machine.

2. 2

   Harness and Connection Check: Inspect the wiring harness and spade connectors between the UCM and the trailer brake valve/controller for broken wires, corrosion, or disconnected terminals.

3. 3

   Software Check: Use the CNH Electronic Service Tool (EST) to read the current UCM configuration and see what the trailer brake setting is currently programmed to.

1. 1

   Connect diagnostic tool

   Connect the CNH Electronic Service Tool (EST) to the tractor's diagnostic port.

2. 2

   Navigate to configuration

   Navigate to the configuration screen for the Universal Control Module (UCM).

3. 3

   Locate setting

   Locate the configuration line for the Trailer Brake Controller.

4. 4

   Change setting

   Change the setting to match the physical hardware of the tractor: If the tractor has a trailer brake valve installed, set the configuration to 'Installed'. If the tractor does not have a trailer brake valve, ensure the configuration is set to 'Not Installed'.

5. 5

   Save setting

   Save the new setting in the EST.

6. 6

   Restart tractor

   Restart the tractor (cycle the key) to allow the UCM to reboot and recognize the new configuration.

7. 7

   Test and clear codes

   Test the operation of the trailer brakes (if equipped) and clear the inactive fault codes from the UCM fault stack.

8. 8

   Replace faulty components

   If the configuration is correct but the fault persists, the trailer brake valve itself or the wiring harness may be faulty and require replacement.