John Deere 003510.06 – Rear Chassis Control Unit (CCU): Sensor Supply Circuit Overcurrent

The Chassis Control Unit (CCU) has detected that a sensor power supply circuit is drawing excessive electrical current, indicating a short circuit to ground. This over-current condition triggers the fault to protect the control unit from damage. The issue is specific to the Rear Chassis area and affects the reference voltage (e.g., 5V or 12V) supplied to various sensors.

• 7R Series
• 8R Series
• 8RT Series
• 9R Series
• 9RT Series
• 9RX Series

1. 1

   Visually inspect wiring harnesses connected to the Rear CCU and rear sensors for chafed or melted insulation, pinched wires, or corrosion. Pay close attention to areas where the harness may rub against the tractor frame or other components.

2. 2

   Identify potential sensors on the rear chassis powered by the CCU, such as the radar sensor, hitch position sensor, differential lock solenoid, rear PTO sensors, drive shaft speed sensors, hydraulic system sensors, or chassis tilt sensor.

1. 1

   Confirm the fault

   Use a diagnostic scanner to ensure the 003510.06 fault code is currently active.

2. 2

   Isolate the circuit

   Turn the ignition off. Disconnect the main electrical connector from one of the potential sensors on the rear chassis. Turn the ignition back on (do not start the engine) and check if the fault code is still active. Ignore any new open circuit codes.

3. 3

   Identify faulty sensor

   If the fault code becomes inactive, the disconnected sensor is the likely cause of the short circuit. If it remains active, reconnect the sensor and repeat the isolation process for each remaining sensor on the circuit.

4. 4

   Test wiring harness

   If disconnecting all potential sensors does not clear the active fault, disconnect the main CCU connector and sensor connectors. Use a multimeter and wiring diagram to check for continuity and shorts to ground on the sensor supply wire.

5. 5

   Replace component or repair wiring

   Replace the identified faulty sensor or repair the shorted section of the wiring harness.

6. 6

   Clear codes

   Use a diagnostic scanner to clear all stored diagnostic trouble codes and verify the fault does not return.