Case IH 3179 – Engine Controller (EDC / Engine ECU): Timeout of CAN Message BC2EDC2

CAN bus communication failure. The Engine Control Module (EDC) expects to receive a specific data packet (BC2EDC2) from the Vehicle Controller (VCM / Cab Controller) at regular intervals. When this message is not received within the programmed time limit, the system logs a timeout error.

• Farmall
• skid steer
• Magnum Series (180, 215, 235, 245, 260, 290, 315, 340 including Series 4 and CVT models)
• Steiger Series
• Puma Series
• Skid Steers / Compact Track Loaders (SR175, SV series, etc.)

1. 1

   Visual Inspection: Inspect the CAN bus wiring harness between the Vehicle Controller and the Engine Controller for physical damage, chafing, cuts, or corrosion.

2. 2

   Connector Check: Disconnect the plugs at both the Engine Controller and the Vehicle Controller. Check for bent pins, pushed-back terminals, moisture, or corrosion.

3. 3

   CAN Bus Resistance Test: With the battery disconnected, use a multimeter to measure the resistance across the CAN High and CAN Low pins. A healthy CAN bus should measure approximately 60 ohms. If it reads ~120 ohms, one of the CAN terminators has failed or there is an open circuit/break in the wiring. If it reads 0 ohms, the CAN High and CAN Low wires are shorted together.

4. 4

   Power and Ground Verification: Verify that both the Engine Controller and Vehicle Controller are receiving proper unswitched power, switched power, and clean grounds.

1. 1

   Disconnect Power

   Always disconnect the battery before servicing CAN bus components or unplugging control modules.

2. 2

   Clean and Secure Connections

   If moisture or light corrosion is found at the ECU/VCM connectors, clean the pins with electrical contact cleaner, apply dielectric grease, and securely reconnect them.

3. 3

   Test Wiring Continuity

   If the visual inspection is clear, use a multimeter to test the CAN High and CAN Low wires for end-to-end continuity between the controllers. Repair any broken wires found in the harness.

4. 4

   Replace Faulty Terminators

   If the CAN bus resistance test yielded 120 ohms, locate the CAN bus terminator resistors (often located near the engine bay and behind the cab/armrest). Replace the faulty terminator. Note: Case IH issued a service bulletin to replace older, failure-prone active terminators with a newer, more stable passive "cap style" resistor.

5. 5

   Module Replacement (Worst Case)

   If the wiring harness is perfectly intact, terminators measure correctly, and power/ground is verified, the fault is likely an internal failure of the CAN transceiver within either the Vehicle Controller or the Engine Controller. This requires replacing the module and having a dealer reprogram it.

6. 6

   Clear and Test

   Reconnect the battery, clear the fault codes using a diagnostic tool, and test-run the machine to verify the code does not return.