New Holland 3117 – ECM: PTO Twist Sensor - Out of Range

The Engine Control Module (ECM) has detected that the signal from the PTO twist sensor is either too high or too low, falling outside of its expected operational range. This condition prevents the engine's control system from accurately monitoring the torque or load on the PTO shaft, and indicates a problem with the sensor itself, its calibration, or its electrical connection to the system.

• T8.275
• T8.300
• T8.320
• T8.330
• T8.350
• T8.360
• T8.380
• T8.390
• T8.410
• T8.420
• T8.435
• TG210
• TG275
• TG305
• TG Series
• T8000 Series
• Magnum 235
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 315
• Magnum 340
• Magnum 370
• Magnum 380
• MX Series

1. 1

   Visually inspect the wiring harness and connectors leading to the PTO twist sensor for cracked or frayed wires and corrosion.

2. 2

   Perform a wiggle test with the tractor running by carefully wiggling the sensor wiring and connectors to check if the fault code appears or disappears, indicating an intermittent connection.

3. 3

   Check for other active fault codes, particularly those related to sensor supply voltage (e.g., 3118, 3119) or communication, which could be the root cause.

4. 4

   Disconnect the sensor and perform a resistance check across the sensor's pins using a multimeter. An open circuit (infinite resistance) or a short circuit (near-zero resistance) indicates a faulty sensor.

5. 5

   Perform a voltage drop test to verify the sensor is receiving the correct voltage from the ECU and has a solid ground connection.

1. 1

   Repair wiring and connectors

   If wiring issues were found during the diagnostic checks, repair or replace the damaged sections of the harness. Ensure all connections are clean, secure, and free of corrosion.

2. 2

   Replace PTO twist sensor

   If circuit tests point to a faulty sensor, disconnect the battery, unplug, and remove the sensor from its mounting position on the rear axle housing. Install the new sensor, reconnect the electrical connector, and apply dielectric grease to the pins to prevent future corrosion.

3. 3

   Calibrate the new sensor

   With no implements connected and the tractor parked on level ground, stop the engine and access the diagnostic 'H' menu on the display. Navigate to the PTO torque sensor calibration routine, start the engine, and follow on-screen prompts (e.g., setting engine to 1200 RPM) until the confirmation message appears.