John Deere Fault Code

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SPN 3510 - FMI 4

Multiple Random Sensor Faults / Low Voltage

System

Electrical

Symptom

Multiple Random Sensor Faults / Low Voltage

Diagnosis & fix steps

LOGIC: Sensor Supply Voltage #2 Circuit Low. ACTION: Isolate the 5V reference wire bundle. Disconnect linked sensors (e.g., fuel rail pressure, oil pressure) one by one until the circuit voltage jumps back to 5.0V.

Red Seal field insights

Diagnostic Logic: A single internally shorted sensor pulls down the entire 5V reference rail, knocking out innocent companion sensors. Very common in vibrating high-hour configurations.

Same code keeps coming back?

That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.

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Read before you touch anything

  • This is general reference information, not a repair manual. It is for trained, qualified technicians.
  • Fault codes, meanings and procedures vary by model, serial number and software version. Confirm the code and the procedure against the manufacturer's service manual before acting.
  • Follow the OEM service manual, torque specs and your site's safety procedures: lockout/tagout, block raised equipment, relieve hydraulic, fuel and air pressure, and let hot systems cool.
  • You use this information at your own risk. Adventure Mechanical and AM Fleet Integrity accept no liability for damage, injury, downtime or loss arising from its use.
  • Not affiliated with or endorsed by any manufacturer. Brand names are used only to identify the equipment a code applies to.

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