New Holland ENG 3002 – Engine Controller: Foot Throttle Sensor - Signal Above Range Max

This code indicates that the Engine Control Unit (ECU) is receiving a voltage signal from the foot throttle position sensor that exceeds the maximum allowable threshold (typically greater than 4.8V to 5.3V). This is usually caused by a short to power in the wiring harness, a failed sensor potentiometer, or an excessively high reference voltage (VREF) being supplied to the sensor.

• T5 Series (T5.95, T5.105, T5.115)
• T6 Series
• T7 Series
• T8 Series (e.g., T8.380)
• T9 Series
• Workmaster 60
• Workmaster 70
• 5620 CRDI
• 200 Series Skid Steers / CTLs (C227, C232, C238, L218, L220, L225, L230, L234)
• 300 Series Skid Steers / CTLs
• CR9090
• CX8080 Elevation
• CX8090 Elevation
• Case SR/SV/TR/TV Series Skid Steers
• Case 580N backhoes

1. 1

   Visual Inspection: Check the foot throttle sensor wiring harness and connector for chafing, bare wires, or water ingress that could cause a short to power.

2. 2

   Check Reference Voltage (VREF): Disconnect the sensor and turn the key to the ON position. Measure the supply voltage at the connector. If the supply voltage is over 5.2V - 5.5V, the issue is likely upstream (e.g., a wiring short to a higher voltage source or a faulty instrument cluster/ECU supplying the voltage).

3. 3

   Check Sensor Output: If the reference voltage and ground are within specification (typically 5V reference), back-probe the signal wire while the sensor is plugged in. If the signal voltage reads above 4.8V without the pedal being fully depressed (or exceeds 5.3V at any time), the sensor has failed internally.

1. 1

   Power Down

   Turn off the machine, remove the key, and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Locate the Sensor

   Locate the foot throttle pedal assembly on the floorboard of the cab.

3. 3

   Disconnect

   Unplug the electrical connector from the foot throttle sensor.

4. 4

   Remove Hardware

   Depending on the model, the sensor may be attached via a linkage rod and mounting bracket. Remove the retaining hardware (e.g., unbolting the sensor from the Foot Throttle Sensor Mount Bracket) and disconnect the Foot Throttle Link Rod.

5. 5

   Replace

   Install the new foot throttle sensor assembly and reattach the linkage rod and bracket hardware.

6. 6

   Reconnect

   Plug the electrical harness back into the sensor. Reconnect the battery.

7. 7

   Clear Codes & Calibrate

   Turn the key on and use a diagnostic tool (like the CNH Electronic Service Tool) to clear the ENG 3002 inactive code. Some models may require a throttle pedal calibration procedure via the instrument cluster or diagnostic software to learn the new minimum and maximum voltage sweeps.