Case IH F-518302-09 - ECU – Engine Control Unit (ECU): CAN communication failure between vehicle controller and ECU controller - TSC1_PE message

The Engine Control Unit (ECU) has lost communication with the Vehicle Control Module (VCM) or Central Control Unit (CCU) over the CAN bus network. Specifically, the ECU is failing to receive the expected "TSC1_PE" (Torque/Speed Control) message, or the message is timing out/corrupted.

• MAGNUM AFS Connect
• Magnum AFS Connect (180, 200, 240, 250, 280, 310, 340, 380, 400)
• Steiger & Quadtrac Series Tractors (370, 420, 470, 500, 540, 580, 620)
• Puma Series Tractors
• Optum Series Tractors
• 240 Series Combines (7240, 8240, 9240)
• Axial-Flow Combines
• Austoft 8800 / 9900 Sugar Cane Harvesters

1. 1

   Verify if the fault code is currently active or stored in history.

2. 2

   Verify that the tractor battery power supply has not been connected to an external power supply (like a jump box or external charger), as this can cause voltage spikes that disrupt CAN communication.

3. 3

   Check the ECU A-095 supply voltage by disconnecting the vehicle (VE) harness from the ECU A-095 at connector X-911 and using a multimeter to check for proper voltage with the ignition ON.

4. 4

   Visually inspect the CAN Node A Bus for damaged, bent, or dislocated pins, corroded terminals, or broken wires. Flex the harnesses to reveal intermittent breaks or shorts.

5. 5

   Verify that the appropriate software version is installed on the ECU A-095.

1. 1

   Disconnect External Power

   If an external power supply is connected to the tractor, disconnect it immediately and test the system for normal operation.

2. 2

   Repair Wiring

   If the visual inspection reveals damaged wiring or connectors on the CAN Node A Bus, repair or replace the affected harness sections. Ensure the connectors are fully seated and locked.

3. 3

   Check CAN Termination

   The ECU A-095 provides an internal CAN termination resistor for the CAN Node A Bus. If the wiring is intact but communication fails, the internal resistor or the ECU's CAN transceiver may have failed.

4. 4

   Software Flash

   If wiring and voltage are within specification, reinstall or flash the ECU A-095 software using the dealer diagnostic tool.

5. 5

   Module Replacement

   If software flashing does not resolve the issue and the harness is confirmed good, the Engine Control Unit (ECU) must be replaced and programmed to the machine.