Case IH 19395 – Engine Control Module (ECM) / EDC: CAN timeout error - TSC1DE message (Torque/Speed control from ABS/ASR to ECM - Limp home status)

This is a Controller Area Network (CAN) communication error. The TSC1DE message contains torque and speed demand information sent from the ABS/ASR (Anti-lock Braking System / Anti-Slip Regulation) or the Driveline Retarder to the engine. When the engine controller stops receiving this message at the expected rate, it triggers a timeout. The engine defaults to a protective Limp Home mode, severely restricting engine power and RPM.

• Tier 4b
• Case IH Magnum
• Case IH Puma
• Case IH Optum
• Case N-Series Loader Backhoes

1. 1

   Check for companion codes using the CNH Electronic Service Tool (EST) to see if other modules are reporting CAN bus timeout errors (e.g., codes 19396, 19397, or 19400).

2. 2

   Inspect the main CAN bus wiring harness between the ECM, the ABS/ASR controller, and the Driveline Retarder for chafed wires, pinch points, or rodent damage.

3. 3

   Disconnect the harness at the ECM and the ABS/ASR module to check for pushed-back pins, corrosion, or moisture intrusion inside the connectors.

4. 4

   With the battery disconnected, measure the resistance across the CAN High and CAN Low pins at the diagnostic port (should read approximately 60 ohms; 120 ohms indicates a faulty resistor/open circuit, 0 ohms indicates a short).

5. 5

   Verify that the Driveline Retarder or ABS/ASR module is receiving power and ground.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the negative battery terminal to prevent electrical spikes during testing.

2. 2

   Repair Wiring/Connectors

   If the visual inspection or resistance test revealed a short, open circuit, or damaged connector, repair the wiring harness using OEM-approved splice kits or replace the damaged connector pins.

3. 3

   Replace Terminating Resistors

   If the CAN bus resistance tested at 120 ohms and wiring is intact, locate and replace the failed CAN bus terminating resistor.

4. 4

   Test Module Power/Ground

   Reconnect the battery. Back-probe the ABS/ASR module connector to ensure it is receiving 12V power and has a solid ground. If power/ground is missing, trace and repair the supply circuit or replace the blown fuse.

5. 5

   Replace Faulty Module

   If the wiring, terminating resistors, and power/ground supplies are all perfect, the CAN controller inside either the ABS/ASR module or the ECM has failed. Replace the suspect module (usually the ABS/ASR module is the culprit if the ECM is still communicating with the diagnostic tool).

6. 6

   Clear and Verify

   Reconnect all components, connect the CNH EST diagnostic tool, clear the 19395 fault code, and test drive the machine to ensure it successfully exits Limp Home mode.