New Holland 3002 – ECU: Accelerator Pedal Signal Above Range Max

The Engine Control Module (ECM) has detected a voltage signal from the accelerator pedal sensor that is higher than the maximum expected allowable range. This typically indicates a malfunction in the sensor itself or an issue within the sensor's circuit, such as an open circuit or a short to a power source. Because the ECM relies on this signal to determine the operator's desired engine speed, an out-of-range signal can lead to poor acceleration, erratic engine response, or force the engine into a protective limp mode to prevent damage.

• T8 Series
• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• TL70
• TL80
• TL90
• TL100
• TM115
• TM120
• TM125
• TM130
• TM135
• TM140
• TM150
• TM155
• TM165
• TS90
• TS100
• TS110
• TS115
• TS100A
• TS110A
• TS115A
• TS135A

1. 1

   Check for 12V supply at pin 3 of connector 164. If no voltage is present, check fuse 46, which also supplies power to the fuel sender and auxiliary power outlets.

2. 2

   Verify ground circuit by testing for voltage at pins 7 and 8 of connector 164. If not, inspect the ground circuit back to the TCU controller.

3. 3

   Test for a 5V sensor supply at terminal 4 of connector 160. If 5V is not present, test the circuit back to the TCU connector. If there is still no 5V supply at the TCU, the TCU itself may be faulty and require re-testing after swapping with a known good unit.

4. 4

   Test the position potentiometer for a smooth voltage sweep from approximately 0.55V to 4.15V between terminal 2 of connector 160 and ground pin 8 as the pedal is operated. If the voltage does not change smoothly or is out of this range, the potentiometer is likely faulty.

5. 5

   Test the idle switch voltage between pin 6 of connector 160 and ground pin 8 (should be 0V when released, 5V when fully depressed). If the voltage readings are incorrect, the switch may need replacement.

1. 1

   Gain Access

   Safely park the vehicle and disconnect the battery. Locate the accelerator pedal assembly and its associated electrical connectors.

2. 2

   Perform Diagnostic Checks

   Follow the diagnostic checks outlined above to determine if the issue lies with the power supply, ground, the sensor itself, or the wiring.

3. 3

   Inspect Wiring and Connectors

   Carefully inspect the wiring harness for any signs of damage, such as chafing, corrosion, or loose connections, particularly around the accelerator pedal and leading to the ECU/TCU.

4. 4

   Replace the Faulty Component

   If diagnostic checks indicate a faulty accelerator pedal potentiometer or idle switch, replace the accelerator pedal assembly or the specific sensor. If a wiring issue is found, repair or replace the damaged section of the harness. If all components and wiring test correctly, the issue may be with the control module (ECU or TCU); further professional diagnosis is recommended before replacing a control unit.

5. 5

   Clear Fault Codes and Re-test

   After completing the repair, reconnect the battery, clear the fault codes using a diagnostic tool, and operate the vehicle to ensure the fault does not return. If the issue persists, further diagnosis may be required.