Case IH 3334 – Engine Control Unit (ECU) A-095: CAN communication failure between the vehicle controller and the ECU controller - TSC1_PE message

The main vehicle interface bus (CAN Node A Bus) has lost communication with the engine controller regarding a specific torque/speed control message (TSC1_PE).

• Farmall
• skid steer
• Steiger T4B
• 240 Series Axial-Flow Combines (7240, 8240, 9240)
• Puma Series Tractors

1. 1

   Check that the tractor/machine battery power supply has not been connected to an external power supply (such as a jump box or external charger). If connected, disconnect it and test for normal operation.

2. 2

   Visually inspect the CAN bus wiring harnesses and connectors leading to ECU A-095 for damaged, bent, or dislocated pins, corroded terminals, or broken wires.

3. 3

   Verify that all connectors are completely installed and seated securely.

4. 4

   Flex the involved harnesses while observing the monitor to reveal any intermittent breaks or shorts in the wiring.

1. 1

   Emergency Movement

   If the machine experiences a full power loss due to this code, emergency re-starts are available to move the machine. This allows 30 seconds of operation without power loss before the engine is automatically reduced to low idle speed.

2. 2

   Wiring Repair

   If the visual inspection or flex test reveals damage to the CAN bus wiring or connectors, repair or replace the affected harness sections.

3. 3

   Software Verification

   If the wiring is intact and the fault has not been resolved, verify that the appropriate software for the ECU A-095 is present. Reinstall or flash the ECU software if necessary.

4. 4

   Module Replacement

   If the wiring is verified good, the software is up to date, and the communication failure persists, the ECU A-095 itself may have suffered an internal hardware failure and will need to be replaced.