Case IH 19323 (DTC 94FB) - ECU – Engine Control Unit (ECU): External engine shutdown request received

The engine did not shut itself down due to an internal mechanical failure; rather, the Engine ECU received a direct command over the CAN bus network from another module (such as the main Vehicle Control Module) requesting an immediate engine shutdown.

• MAXXUM T4E
• Case IH 240 Series Axial-Flow Combines (7240, 8240, 9240)
• Case IH Farmall Tractors (40, 45, and 50 models with Cab and CVT Transmission)
• Case IH N-Series Tractor Loader Backhoes (TLBs)
• Machines utilizing the MTA CCM & APH Stage V MR on-board diagnostics system

1. 1

   Check for primary fault codes in the main Vehicle Control Module (VCM/BCU) that may have triggered the shutdown request

2. 2

   Verify the integrity of the CAN bus communication between the vehicle controller and the Engine ECU (look for CAN timeout errors like DTC 951B / 3096 or DTC 956B / 3179)

3. 3

   If full power loss is experienced, use the emergency re-start feature to move the machine to a safe diagnostic location (allows 30 seconds of operation)

1. 1

   Read All Modules

   Do not attempt to replace engine components based solely on code 19323. Read all modules on the machine's CAN network.

2. 2

   Diagnose the Root Cause

   Identify the primary fault code logged in the Vehicle Control Module that initiated the shutdown request.

3. 3

   Perform Targeted Repair

   Repair the underlying issue (e.g., replacing a faulty coolant temperature sensor, repairing a severed CAN wire, or fixing a hydraulic leak).

4. 4

   Clear Codes

   Once the primary issue is resolved, clear the codes in both the VCM and the Engine ECU.

5. 5

   Test Operation

   Start the machine and verify that the external shutdown request is no longer being broadcast and the engine runs normally.