Case IH 19400 – Engine Control Module (ECM) or Vehicle Control Unit (VCU): Timeout of CAN-Transmit-Frame TxEBC1, Electronic Brake Controller 1

A Controller Area Network (CAN) bus communication error indicating that the Engine Control Module (ECM) or Vehicle Control Unit (VCU) is expecting to receive a specific data broadcast (the TxEBC1 frame) from the Electronic Brake Controller 1 (EBC1), but the message is not arriving within the required timeframe. This points to a network interruption, a wiring fault, or a failed brake controller module.

• Tier 4b
• Puma
• Optum
• Magnum
• Steiger
• N-Series Loader Backhoes
• F-Series Wheel Loaders

1. 1

   Check for Multiple Codes: If multiple CAN timeout codes are present (e.g., TxTC1 transmission timeouts), the issue is likely a global CAN bus failure (such as a shorted network or bad terminating resistor) rather than an isolated EBC1 failure.

2. 2

   Inspect Connectors: Check the harness connectors at the Electronic Brake Controller and the ECM for moisture intrusion, corrosion, or backed-out pins.

3. 3

   Verify Power and Ground: Ensure the EBC1 is receiving proper battery voltage and has a clean, low-resistance ground. A module without power cannot transmit CAN messages.

4. 4

   Test CAN Bus Resistance: With the battery disconnected, measure the resistance across the CAN High and CAN Low pins at the EBC1 connector. A healthy CAN network should read approximately 60 ohms.

1. 1

   Power Down

   Turn off the ignition and disconnect the negative battery cable to prevent electrical spikes during testing.

2. 2

   Locate the EBC1

   Locate the Electronic Brake Controller module (location varies by machine; refer to the specific model's service manual).

3. 3

   Harness Inspection & Cleaning

   Disconnect the EBC1 harness. Spray the connector with electrical contact cleaner and check for damaged pins. If moisture is found, dry the connector and apply dielectric grease.

4. 4

   Perform Continuity Testing

   Using a multimeter, test the continuity of the CAN High and CAN Low wires from the EBC1 connector back to the ECM. Repair any broken, chafed, or shorted wires in the harness.

5. 5

   Check Fuses/Relays

   Verify that the fuse supplying power to the EBC1 is intact. Replace if blown, and trace for shorts to ground if the new fuse blows immediately.

6. 6

   Replace the Module

   If the wiring harness, terminating resistors, power, and ground all test perfectly, the CAN transceiver inside the Electronic Brake Controller has likely failed. Replace the EBC1 module.

7. 7

   Clear Codes and Test

   Reconnect the battery. Use a diagnostic scanner (such as the Case IH EST or Jaltest) to clear the 19400 fault code. Cycle the key and test the service brakes to ensure the code does not return and communication is restored.