John Deere 3510.03 – ECU: Sensor Supply #2 Voltage Out of Range High

The control module has detected a supply voltage above the specified limit on the 5-volt sensor supply circuit #2. This typically indicates that the 5-volt circuit is shorted to a 12-volt power source, which can lead to erroneous sensor measurements, engine derating, or total sensor failure.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 9230
• 9470RT
• 9520RT
• 9570RT
• 7180
• 7280
• 7380
• 7480
• 7580
• 7780
• 7980
• 770G
• 770GP
• 330LC-8B
• 3520

1. 1

   Verify the active fault code 003510.03 using John Deere Service ADVISOR or a compatible diagnostic tool.

2. 2

   Visually inspect the engine wiring harness branches routing to sensors on the #2 5-volt supply circuit for chafing, melted insulation, or pinched wires that could cause a short to 12V.

3. 3

   Perform a sensor isolation test by disconnecting sensors on the 5V supply #2 circuit one at a time while monitoring circuit voltage to identify internal shorts.

4. 4

   Inspect the ECU connectors and pins for corrosion, moisture, or bent pins that could bridge a 12V pin to the 5V supply pin.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent further electrical damage during testing.

2. 2

   Isolate the Short

   Based on the diagnostic checks, determine if the short to 12V is located in a sensor, the wiring harness, or the ECU itself.

3. 3

   Replace Faulty Sensor

   If the sensor isolation test identified an internally shorted sensor, replace it.

4. 4

   Repair/Replace Wiring Harness

   If the wiring harness is rubbed through and shorting to a 12V source, repair the damaged section of the wire using OEM-approved splicing methods, or replace the affected harness section entirely.

5. 5

   Address the ECU

   If the harness and all sensors test good, the ECU itself may have an internal short on the 5-volt supply circuit. In this scenario, the ECU must be replaced or reprogrammed by an authorized John Deere dealer.

6. 6

   Clear and Test

   Reconnect the battery, clear the fault codes using the diagnostic tool, and run the engine to verify the code does not return and the 5V circuit remains stable.