New Holland ENG 3359 – Engine Control Module (ECM): TSC Demand Physically Implausible

The Engine ECU receives a torque or speed demand that is physically implausible (mathematically invalid, corrupted, or falls completely outside the physical operating capabilities of the engine) from another controller.

• New Holland T8.xxx Series tractors

1. 1

   Check for associated fault codes using the CNH Electronic Service Tool (EST), specifically CAN bus timeout codes (e.g., ENG 3334-3339) or sensor faults on the transmission/armrest controllers.

2. 2

   Inspect the CAN High and CAN Low wiring between the Engine ECU and the Vehicle/Transmission controllers for chafed wires, corrosion in connectors, or loose pins.

3. 3

   Check for mismatched or outdated software versions between the Engine ECU and the Transmission/Vehicle controller.

1. 1

   Connect Diagnostic Tool

   Plug the CNH EST (Electronic Service Tool) into the machine's diagnostic port.

2. 2

   Address Root Cause Codes

   If there are active codes for wheel speed sensors, transmission sensors, or armrest potentiometers, diagnose and repair those first.

3. 3

   Test the CAN Bus

   Using a multimeter, measure the resistance across the CAN bus network at the diagnostic connector (with the battery disconnected). It should read approximately 60 ohms. If it reads 120 ohms or higher, there is an open circuit or a failed terminating resistor that must be repaired.

4. 4

   Repair Wiring

   If wiring damage or connector corrosion is found during the visual or multimeter inspection, repair the harness or replace the damaged pigtail connector.

5. 5

   Flash/Update Software

   If the wiring is intact and no other sensor codes are present, check the CNH eTIM portal for software updates. Flash the Engine ECU and the requesting controller (Transmission/Body controller) to the latest software versions.

6. 6

   Clear and Test

   Clear the fault codes using the EST. Start the machine and operate it under load to verify the code does not return.