New Holland 3004 – ECM: Engine Hand/Foot Throttle Signal Error

The Engine Control Module (ECM) has detected a 'No Signal' or 'Error' condition from the foot throttle sensor or hand throttle potentiometer over the CAN bus. This indicates a complete loss of the voltage signal that represents the physical position of the throttle pedal or lever, preventing the operator from controlling engine speed. The issue could stem from the sensor itself, wiring, connectors, or CAN bus communication.

• T8.xxx Series
• TM115
• TM120
• TM125
• TM130
• TM135
• TM140
• TM150
• TM155
• TM165
• TM175
• TM190
• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• TS90
• TS100
• TS110
• TS115
• TS100A
• TS110A
• TS115A
• TS125A
• TS135A
• TL70
• TL80
• TL90
• TL100
• T4020
• T4030
• T4040
• T4050

1. 1

   Visually inspect the wiring harness and connectors between the foot/hand throttle and the main vehicle harness for chafing, corrosion, or loose connections.

2. 2

   Check for other active fault codes, particularly those related to sensor supply voltage or CAN bus communication.

3. 3

   Test for 12V supply at the appropriate pin on the throttle sensor connector with the key in the 'ON' position (check corresponding fuse if no voltage).

4. 4

   Verify a good ground connection at the designated pin on the sensor connector.

5. 5

   Check for a 5V reference signal at the correct pin on the sensor connector (supplied by the control module).

6. 6

   Test the position potentiometer signal by connecting a voltmeter to the signal output pin; voltage should change smoothly (e.g., 0.55V to 4.15V) as the throttle is moved.

7. 7

   Test the idle validation switch (if equipped) for proper operation by checking for a voltage change (e.g., 0V to 5V) when moving from idle.

8. 8

   Check CAN bus termination resistors with the system powered off (should read approximately 60 Ohms between CAN High and CAN Low).

9. 9

   Check CAN voltages with the system powered on (CAN High to ground should be ~2.5-3.0V, CAN Low to ground should be ~2.0-2.5V).

1. 1

   Replace throttle potentiometer

   If diagnostic tests reveal sudden drops, spikes, or a complete lack of voltage change during the sweep test, replace the faulty throttle potentiometer or sensor assembly.

2. 2

   Repair or replace wiring

   If visual inspection or multimeter tests reveal damaged wiring or poor connections in the harness, repair or replace the affected section.

3. 3

   Perform advanced CAN diagnostics

   If the sensor and wiring are intact but the fault persists, use a New Holland Electronic Service Tool (EST) to diagnose the CAN bus or control module for deeper communication failures.