John Deere 000091.14 – ECU: Hand Throttle Signal Voltage Issue Out Of Range (ECU)

The ECU has detected a hand throttle signal voltage that is out of the expected range. This indicates a potential problem with the signal being sent from the hand throttle to the ECU, often described as a '2-Channel Accelerator Pedal Not Learned' condition. The ECU cannot properly calibrate the hand throttle position sensor, resulting in an inability to accurately determine the operator's desired throttle setting. This can lead to a lack of throttle response, inconsistent acceleration, or the engine entering a reduced power mode.

• 5045E
• 5050E
• 5055E
• 5058E
• 5060E
• 5065E
• 5067E
• 5075E
• 5085E
• 5090E
• 5100E
• 5065M
• 5075M
• 5085M
• 5090M
• 5095M
• 5100M
• 5105M
• 5115M
• 5125M
• 5130M
• 5080R
• 5090R
• 5100R
• 6105E
• 6110E
• 6115E
• 6120E
• 6100D
• 6105D
• 6115D
• 6090M
• 6100M
• 6110M
• 6115M
• 6120M
• 6105R
• 6110R
• 6115R
• 6120R
• 6125R
• 6130R
• 6140R
• 6150R
• 6170R
• 6190R
• 6210R
• 7220
• 7320
• 7420
• 7520
• 7430E
• 7530E
• 110TLB
• 3033R
• 3038R
• 3045R
• 3120
• 3320
• 3520
• 3720
• 4049M
• 4049R
• 4120
• 4210
• 4310
• 4320
• 4410
• 4520
• 4610
• 4710
• 4720

1. 1

   Carefully inspect the hand throttle linkage for any signs of binding, misalignment, or slipping

2. 2

   Examine the wiring harness and electrical connectors for the hand throttle position sensor, looking for damage, corrosion, or loose connections

3. 3

   Read all active and stored Diagnostic Trouble Codes (DTCs) to see if other related faults are present

4. 4

   Use a multimeter to check for continuity and resistance in the wiring harness between the sensor and the ECU, ensuring there are no open circuits or shorts to ground

5. 5

   Verify that the sensor is receiving the correct reference voltage from the ECU (5 volts on some models). The signal voltage on the middle lead to the ground lead should be approximately 0.8 volts at idle

6. 6

   With the ignition off, disconnect the throttle potentiometer and measure the resistance between the power (terminal C) and signal (terminal B) terminals

1. 1

   Address immediate issues

   Based on the diagnostic checks, repair any damaged wiring, clean corroded connectors, or correct any mechanical issues with the throttle linkage.

2. 2

   Perform sensor calibration

   If the wiring and sensor appear to be in good condition, use OEM diagnostic software to calibrate the sensor. This allows the ECU to learn the voltage range of the throttle position sensor.

3. 3

   Replace faulty components

   If diagnostic checks point to a faulty sensor, or if calibration does not resolve the issue, replace the hand throttle position sensor or the entire hand throttle assembly.

4. 4

   Clear fault codes

   After performing repairs or replacements, clear all fault codes from the ECU.

5. 5

   Verify repair

   Start the engine and operate the hand throttle to ensure that the fault code does not reappear and that the throttle responds correctly.