John Deere 003509.06 – OIC / SFA / ECU: Sensor Supply Output Drawing Too High Amps

A specific 5-volt electrical circuit is experiencing an excessive current draw, indicating a short circuit in the wiring or a faulty component. The control module provides a stable 5-volt power source to various sensors, and when a component fails or a wire shorts to ground, it draws more electrical current than the circuit is designed to handle. The control module detects this high amperage and logs the fault code to protect itself from damage.

• 6110R
• 6120R
• 6130R
• 6M Series
• 5M Series
• 5R Series
• 8R Series
• 9670 STS
• 9770 STS

1. 1

   Record all active or stored fault codes using the diagnostic display, as other codes may point to the specific sensor causing the overcurrent condition

2. 2

   Carefully inspect the wiring harnesses associated with the reporting control module for pinched, chafed, or frayed wires, rubbing against the frame, or rodent damage

3. 3

   Ensure all electrical connectors related to the suspected control module and its sensors are clean, dry, securely connected, and free of corrosion

4. 4

   Check fuses related to the OIC, SFA, and other relevant controllers, as a blown fuse on a related circuit can cause erratic behavior

5. 5

   Verify that the battery connections are clean and tight, and that the main chassis and engine ground connections are secure

1. 1

   Identify the circuit

   Consult the machine's specific technical or diagnostic manual to identify which sensors are powered by the '5-Volt Supply #1' from the controller that logged the code.

2. 2

   Isolate the faulty component

   Unplug the identified sensors on the circuit one by one. After unplugging each sensor, cycle the key switch and check if the fault code 003509.06 becomes inactive. If the code disappears, that specific sensor or its wiring is the likely cause.

3. 3

   Test and replace sensor

   If a specific sensor is suspected after isolation, replace it with a known good part.

4. 4

   Test wiring harness

   If unplugging a sensor does not clear the code, or if the code remains with all sensors unplugged, test the wiring harness for continuity and shorts to ground. Repair or replace the damaged section of the harness.

5. 5

   Replace control module

   If all sensors and the wiring harness on the 'Supply #1' circuit test good but the fault persists, the issue may be with the control module itself. Replace the module only after exhausting all other possibilities.