Case IH 17584 (F-518255-14) - ECU – Engine Control Unit (ECU A-095): CAN communication failure between vehicle controller and ECM controller - TSC1_VR message

The ECU fails to sense the TSC1_VR (Torque/Speed Control 1 - Vehicle Retarder) message at the active rate due to a timeout, message corruption, or a physical bus failure.

• VESTRUM CVX
• Farmall (40, 45, 50 with Cab/CVT)
• Magnum (180 through 380)
• Steiger (370 through 620)
• 240 Series Axial-Flow Combines
• 7230
• 8230
• 9230
• TC5090
• A8000 Sugar Cane Harvesters
• A8800 Sugar Cane Harvesters
• Wheel Loaders (521F-1121F)
• Crawler Dozers (850L-1850K)
• Backhoe Loaders (580SN, 590SN)

1. 1

   Connect the Electronic Service Tool (EST) to check if the fault is currently active to rule out an intermittent connection

2. 2

   Check for other related vehicle CAN faults using the EST to determine if there is a broader network failure

3. 3

   Verify that the ECU A-095 has the correct and most up-to-date software installed

4. 4

   Visually inspect the CAN circuit wiring harnesses and connectors between the vehicle controller and the ECU for damaged, bent, or displaced pins, corroded terminals, or broken wires

5. 5

   Perform a flex test on the involved wiring harnesses while observing the monitor to reveal intermittent breaks or shorts in the CAN twisted pair

1. 1

   Resolve Broader Network Issues

   If related vehicle CAN faults exist, troubleshoot and resolve those first. Once resolved, recheck if the 17584 (TSC1_VR) fault has cleared.

2. 2

   Test Wiring Integrity

   Use a multimeter to test the CAN twisted pair wiring between the vehicle controller and the ECU A-095 for continuity, open circuits, shorts to ground, or shorts to battery voltage. Repair any damaged wiring found.

3. 3

   Check Power and Ground

   Verify that the ECU A-095 is receiving proper supply voltage and has a solid ground connection.

4. 4

   Check Termination Resistor

   Verify the integrity of the CAN network's termination resistors (remembering that the ECU A-095 houses the internal termination resistor for Node A).

5. 5

   Replace the ECU

   If the wiring is perfectly intact, supply voltage/ground is correct, no other CAN faults exist, and the software is up to date, the failure is likely internal to the ECU A-095 (e.g., a failed internal powerstage or termination resistor). Remove and replace the Engine Control Unit.