John Deere 3514.03 – ECU / ECM: Sensor Supply Voltage 6 Out of Range High

This code indicates that the 5-volt sensor supply circuit #6 is experiencing a voltage higher than the expected 5V limit, which almost always points to a short circuit to a 12-volt source (battery voltage).

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 9470RT
• 9520RT
• 9570RT
• 8245R to 8400R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC

1. 1

   Measure voltage output on the Sensor Supply #6 circuit at the DPF Pressure Sensor and DPF Temperature Module connectors to confirm if voltage is spiking above the normal 5V limit.

2. 2

   Visually inspect the wiring harness connecting the ECU to the DPF sensors for chafed wires, melted insulation, or pinched harnesses that could cause the 5V supply wire to touch a 12V power wire.

3. 3

   Disconnect the DPF Pressure Sensor and DPF Temperature Module one at a time. If the voltage on the circuit drops back down to a normal 5V after unplugging a specific sensor, that sensor is internally shorted.

1. 1

   Disconnect Power

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

2. 2

   Repair Wiring

   If the diagnostic checks revealed a short in the wiring harness, repair or replace the damaged section of the wire or the connector.

3. 3

   Replace Shorted Sensor

   If unplugging the DPF Pressure Sensor or DPF Temperature Module resolved the voltage spike, replace the faulty sensor.

4. 4

   Reassemble and Reconnect

   Plug all sensors back in and reconnect the battery.

5. 5

   Reset ECU and Validate

   Clear the fault codes from the ECU. Start the engine and use a diagnostic tool or multimeter to verify that the Sensor Supply #6 circuit is maintaining a stable 5V and that the sensors are reporting accurately. Re-calibrate the sensors if required by your specific machine's Component Technical Manual (CTM).