New Holland ENG 3652 – ENGINE (EDC - Electronic Diesel Control): CAN Bus Communication: CAN Bus off of CAN node A

The Controller Area Network (CAN) bus has experienced a critical communication failure at "Node A" (typically the engine controller network interface). The module has gone into a "Bus Off" state, meaning it has detected too many transmission errors and has disconnected itself from the network to prevent further disruption to other modules.

• F5C engines
• F5H engines
• ISM-IDI engines
• L220
• 200 Series
• SR175
• SR130
• SR160
• B90B
• B100B
• B110
• B115

1. 1

   Check battery voltage and ensure the unswitched 12-volt supply to the Engine ECU is stable

2. 2

   Inspect the main engine wiring harness and CAN bus lines for chafing, pinched wires, or melted insulation

3. 3

   Disconnect the Engine ECU and inspect pins for corrosion, moisture, or pushed-back terminals (pay special attention to the 2-pin Engine CAN bus connectors)

4. 4

   Measure termination resistance between CAN High and CAN Low with the battery disconnected (a healthy CAN bus should read approximately 60 ohms)

1. 1

   Safety First

   Attach a "Do Not Operate" warning tag to the machine. Disconnect the negative battery cable before servicing the electrical system.

2. 2

   Isolate the Fault

   If the termination resistance is 120 ohms, one resistor is missing or there is a break in the wiring. If it is 0 ohms, there is a short circuit between CAN High and CAN Low.

3. 3

   Repair/Replace Wiring

   If a short or break is found in the CAN bus wiring, splice in a CAN bus wiring repair section using heat-shrink tubing and dielectric grease, or replace the affected harness section entirely.

4. 4

   Replace Connectors/Resistors

   If the 2-pin CAN connector is heavily corroded or the termination resistor has failed, cut out the damaged connector and wire in a new OEM replacement.

5. 5

   Reconnect and Clear Codes

   Reconnect the battery. Use a dealer diagnostic tool or a compatible CAN-Bus DTC Eraser to clear the ENG 3652 code from the Engine ECU memory, as CAN bus errors often require a hard reset to restore communication.

6. 6

   Verify Operation

   Turn the key to the ON position and verify that the dashboard and Engine ECU are communicating without throwing the code again.