Case IH 19382 – Engine Control Unit (ECU / ENG): Timeout of CAN-Transmit-Frame ECU2BC, ECU to Body Computer

A Controller Area Network (CAN) communication error indicating that the Engine Control Unit (ECU) has lost communication or failed to transmit/receive expected data frames to the Body Computer (BC) / Vehicle Control Module within the required time limit. This is typically caused by a physical wiring issue on the CAN bus network, low voltage, or a faulty module connection.

• Tier 4b
• Tier 4A
• Puma
• Optum
• Magnum
• Steiger
• N Series Loader Backhoes
• 580N
• 590SN
• Tier 4 wheel loaders

1. 1

   Verify battery is fully charged and the alternator is outputting correct voltage, as low system voltage can cause CAN modules to drop offline

2. 2

   Inspect the main wiring harness running from the engine block (ECU) to the cab firewall (Body Computer) for chafing, pinch points, or rodent damage

3. 3

   Disconnect the Engine ECU and Body Computer connectors and inspect for water intrusion, green corrosion, or pushed-back pins

4. 4

   Perform a CAN bus resistance test with the battery disconnected: measure resistance across CAN High and CAN Low pins at the diagnostic port (healthy is ~60 ohms; ~120 ohms indicates an open circuit/missing resistor; 0-5 ohms indicates a short)

5. 5

   Check for accompanying active CAN timeout codes (e.g., 19384 MUXINFO, 3180 Vehicle Control Module) which indicate a total bus failure rather than an isolated ECU-to-BC wire issue

1. 1

   Power Down

   Turn off the key switch and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Isolate the Fault

   Based on the multimeter resistance test, trace the CAN High and CAN Low wires between the Engine ECU and the Body Computer.

3. 3

   Repair Wiring

   If a break or short is found in the harness (commonly near articulation joints or firewall pass-throughs), cut out the damaged section. Solder and heat-shrink the repair, or use OEM-approved weather-sealed butt connectors.

4. 4

   Clean Connections

   If the wiring is intact but connectors are corroded, use electrical contact cleaner and a terminal tool to clean the pins. Apply dielectric grease before reconnecting.

5. 5

   Replace Terminating Resistor (If Applicable)

   If the CAN network is missing a resistor (reading 120 ohms), locate the faulty CAN terminating resistor plug on the harness and replace it.

6. 6

   Clear Codes

   Reconnect the battery. Turn the key to the ON position. Use the CNH Electronic Service Tool (EST) to clear the inactive fault codes from the ECU memory.

7. 7

   Test Run

   Start the engine and operate the machine's hydraulic and PTO functions to ensure the Body Computer and ECU are communicating properly and the code does not return.