Case IH 3365 – Engine ECU: Foot Pedal 2 - Signal Too Low

The voltage signal returning from the secondary sensor (Foot Pedal 2) drops below the minimum acceptable threshold. This typically indicates an open circuit, a short to ground in the sensor wiring, or a complete internal failure of the pedal's potentiometer.

• Case IH Magnum Series
• Case IH Steiger Series
• Case IH Maxxum Series

1. 1

   Visually inspect the wiring harness and the connector at the base of the foot pedal inside the cab for chafed wires, corrosion, or loose/pushed-out pins.

2. 2

   Using a digital multimeter, verify that the pedal sensor is receiving its 5V reference voltage and has a solid ground connection. A short to ground on the signal wire will cause the 'Signal Too Low' condition.

3. 3

   Perform a signal sweep test using the CNH Electronic Service Tool (EST). Monitor live data for both Foot Pedal 1 and Foot Pedal 2 while slowly depressing the pedal. If Pedal 1 sweeps normally but Pedal 2 remains at 0V or a static low voltage, the sensor has failed.

1. 1

   Disconnect Power

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

2. 2

   Access the Pedal

   Locate the electronic foot pedal assembly on the cab floor.

3. 3

   Disconnect Harness

   Unplug the electrical harness connector from the pedal sensor.

4. 4

   Remove Assembly

   Remove the mounting bolts securing the pedal assembly to the cab floor.

5. 5

   Install New Pedal

   Position the new foot pedal assembly and tighten the mounting bolts.

6. 6

   Reconnect

   Plug the electrical harness back into the new sensor and reconnect the battery.

7. 7

   Calibrate and Clear

   Turn the ignition key to the ON position. Use the CNH EST diagnostic tool to clear the inactive 3365 fault code. Depending on the exact model, a throttle pedal calibration routine may need to be run via the EST or the tractor's display monitor to teach the ECU the new minimum and maximum voltage limits.

8. 8

   Test

   Start the engine and test the foot throttle for smooth RPM response.