Case IH 3001 (DTC 3AB1) – Engine Controller (ENG) / Engine ECU: Foot Throttle Sensor - Signal Not Plausible

The control module is receiving a voltage or signal from the foot accelerator pedal sensor that falls outside of the expected logical parameters, or it conflicts with the idle validation switch. This typically points to a failing potentiometer/sensor inside the pedal, a damaged wiring harness, or a calibration issue.

• MAXXUM T4E
• VESTRUM CVX
• Case IH Magnum Tractors (235–340 Series 4, 250, 280, 310, 380)
• Case IH Puma Tractors (140-210)
• Case IH Axial-Flow Combines (240 Series)
• Case IH Compact Track Loaders / Skid Steers (TV370B, TV450B)

1. 1

   Inspect the wiring harness and the 6-cavity electrical connector at the pedal for corrosion, loose pins, open circuits, or shorts to ground/power

2. 2

   Verify physical pedal travel to ensure debris is not preventing the pedal from returning to its base minimum position

3. 3

   Check the instrument cluster for any underlying CAN-bus communication errors causing the signal to drop

4. 4

   Check battery voltage and charging system, as voltage spikes or drops can cause sensors to report out-of-range values

1. 1

   Turn off the machine, remove the key, and disconnect the battery to prevent electrical shorts.

   Turn off the machine, remove the key, and disconnect the battery to prevent electrical shorts.

2. 2

   Locate the foot throttle sensor assembly, which is mounted to the bracket at the base of the accelerator pedal in the cab.

   Locate the foot throttle sensor assembly, which is mounted to the bracket at the base of the accelerator pedal in the cab.

3. 3

   Disconnect the electrical connector (often a Metri-Pack connector) from the sensor.

   Disconnect the electrical connector (often a Metri-Pack connector) from the sensor.

4. 4

   Unbolt the sensor or the entire pedal assembly from the floorboard/support bracket.

   Unbolt the sensor or the entire pedal assembly from the floorboard/support bracket.

5. 5

   Install the new foot throttle sensor or pedal assembly and secure the mounting hardware.

   Install the new foot throttle sensor or pedal assembly and secure the mounting hardware.

6. 6

   Reconnect the electrical connector and reconnect the battery.

   Reconnect the electrical connector and reconnect the battery.

7. 7

   Connect a diagnostic tool (such as the CNH EASy tool or Jaltest) to clear the fault codes and perform a throttle pedal calibration so the Engine ECU can learn the new minimum and maximum signal ranges.

   Connect a diagnostic tool (such as the CNH EASy tool or Jaltest) to clear the fault codes and perform a throttle pedal calibration so the Engine ECU can learn the new minimum and maximum signal ranges.