Case IH 3336 – Engine ECU: Timeout of CAN Message TSC1-TR

This code indicates a CAN bus communication failure. The Engine ECU is failing to receive the expected TSC1-TR (Torque/Speed Control #1 from Traction Control to Retarder/Transmission) message from the Transmission Controller or Traction Control module while the system is in an inactive state.

• Case IH Magnum 235 - 340 (Series 4)
• Case IH Steiger series
• Case IH Axial-Flow Combines (7230, 8230, 9230)

1. 1

   Inspect the CAN Bus cabling between the Engine ECU and the Transmission Controller for physical damage, chafing, short circuits, or power interrupts.

2. 2

   Disconnect the CAN cable connecting the Transmission Controller to the network and inspect for bent, spread, corroded, or loose terminals.

3. 3

   Verify the voltage supply to the Transmission Controller, as an undervoltage condition can cause it to drop off the CAN network.

4. 4

   Check the CAN bus terminating resistors, which should measure approximately 60 ohms across the CAN High and CAN Low pins with the battery disconnected.

5. 5

   Test the protocol of the receiver and check the CAN functional range to ensure the modules are programmed correctly and broadcasting on the correct Source Addresses.

1. 1

   Resolve wiring faults

   If diagnostic checks reveal a broken wire, short circuit, or damaged connector in the CAN bus lines, repair the wiring harness using an approved CAN bus repair kit or replace the affected harness section.

2. 2

   Replace terminating resistors

   If the CAN bus resistance is out of specification (e.g., 120 ohms or open circuit), locate and replace the faulty CAN bus terminating resistor.

3. 3

   Address undervoltage

   If the Transmission Controller is not receiving proper voltage, trace the power supply circuit back to the relays/fuses and repair the power interrupt.

4. 4

   Replace defective module

   If the wiring, power, and terminating resistors are all intact, the fault lies within a defective CAN controller inside either the Transmission Controller or the Engine ECU. The defective module must be replaced and reprogrammed by a dealer.