Case IH 17572 (F-518494-19) - ECU – ECU: CAN message corruption between vehicle controller and ECM controller - TSC1_PE message

The Engine Control Module (ECM/ECU) has received an invalid value or experienced a communication failure from the machine/vehicle controller regarding the Torque-Speed Control (TSC1_PE) message over the Controller Area Network (CAN) bus.

• VESTRUM CVX
• Farmall 40
• Farmall 45
• Farmall 50
• 240 Series Axial-Flow Combines
• Puma
• Magnum
• Maxxum

1. 1

   Verify that the tractor's battery power supply has not been connected to an external power supply

2. 2

   Check the battery voltage on the instrument cluster by starting the engine and running it at 2000 rev/min to ensure proper voltage

3. 3

   Inspect the CAN Node A Bus (main vehicle interface bus) wiring harness between the vehicle controller (VCM) and the ECU for physical damage, open circuits, or short circuits

1. 1

   Isolate the Power Supply

   Ensure no external power sources are interfering with the CAN bus signals.

2. 2

   Test the Wiring Harness

   Perform a continuity and short-to-ground test on the twisted-pair CAN network connecting the vehicle controller to the ECU.

3. 3

   Repair/Replace Harness

   If a short circuit or break is indicated during testing, repair or replace the affected section of the wire harness as required.

4. 4

   Software Update

   If the wire harness tests okay and no physical defects are found, download and flash the correct/latest level of software to the controllers.

5. 5

   Module Replacement

   If the fault recurs after verifying the harness and updating the software, remove and replace the ECU/CCU.