Case IH F83 – Transmission / EDC (Electronic Draft Control) Controller: Foot Throttle Sensor Potentiometer Open Circuit Or Short To Ground

The controller is not receiving a valid voltage signal from the foot throttle pedal position sensor, either due to a broken connection (open circuit) or a wire shorting directly to the chassis ground.

• MXM
• MXM Series
• MXM 120
• MXM 130
• MXM 140
• MXM 155
• MXM 175
• MXM 190
• Maxxum
• Puma
• MXU
• TM Series
• T6
• T7
• TS
• T6000

1. 1

   Inspect the wiring harness leading to the foot throttle sensor potentiometer for visible damage, open circuits, or areas where the wire may be rubbing and shorting to the ground.

2. 2

   Turn the key switch to the 'ON' position, disconnect the foot throttle potentiometer, and then re-connect it to see if the controller registers the change or clears the fault.

3. 3

   Verify that the sensor is receiving the correct 5V or 12V reference voltage from the controller.

1. 1

   Disconnect Power

   Turn off the machine and disconnect the battery to prevent electrical spikes.

2. 2

   Replace the Sensor

   If the wiring harness is intact but the F83 code persists, remove the faulty foot throttle potentiometer from the pedal assembly and install the replacement sensor.

3. 3

   Perform Calibration

   According to the MXM Series Calibration Guide, anytime a potentiometer is replaced, or if the non-volatile memory has been reset, a Transmission/EDC Calibration must be performed.

4. 4

   Calibration Setup (Mode HA)

   Enter calibration mode (Mode HA). Hold the High and Low range buttons and start the engine until 'CAL' appears in the transmission display. Set the engine speed to 1200 ERPM (±100) and follow the on-screen prompts to calibrate the new potentiometer to the transmission controller.