New Holland ENG 1819 – Engine Control Unit (ECU): Speed Sensor: Both sensors out of range (upper side)

The Engine Control Unit (ECU) is receiving an invalid, excessively high voltage, or out-of-bounds signal from both of the engine's speed sensors (Sensor 1 and Sensor 2), typically resulting in a crank-no-start condition or an immediate engine shutdown.

• L213
• L216
• L218
• L220
• SR130
• SR150
• SR175
• SV185
• C227
• C238

1. 1

   Visual Inspection: Inspect the wiring harness and connectors leading to the speed sensors on the engine block/flywheel housing for chafed wires, corrosion, or loose pins.

2. 2

   Resistance Test: Disconnect the sensor and use a multimeter to test the internal resistance of the speed sensor. The resistance should measure between 109.5 - 143.5 ohms at 20 degrees C (68.0 degrees F).

3. 3

   Air Gap Check: Use a dial indicator or feeler gauge to check the sensor air gap between the sensor tip and the trigger wheel. The gap should be approximately 0.7 - 1.7 mm (0.0276 - 0.0669 in).

4. 4

   Voltage Check: Verify that the ECU is supplying the correct 5V reference and ground to the sensor circuit.

1. 1

   Preparation

   Turn off the machine, remove the key, and disconnect the negative battery cable.

2. 2

   Locate the Sensors

   On the ISM-IDI engine, the speed sensors are located on the flywheel housing (sensing engine speed as an engine pulse) and/or on the side of the engine block.

3. 3

   Removal

   Disconnect the electrical pigtail connector from the faulty speed sensor.

4. 4

   Remove retaining bolt

   Remove the single retaining bolt holding the sensor in place.

5. 5

   Remove sensor

   Carefully pull the sensor straight out of the housing.

6. 6

   Installation

   Clean the mounting surface to ensure the new sensor sits flush.

7. 7

   Insert new sensor

   Insert the new speed sensor into the housing and install the retaining bolt.

8. 8

   Verify Air Gap

   Before fully tightening, ensure the air gap is within the specified 0.7 - 1.7 mm range. Torque the bolt to OEM specifications.

9. 9

   Reconnect connector

   Reconnect the electrical connector.

10. 10

    Clear Codes

    Reconnect the battery. Use a diagnostic service tool (or CAN-bus DTC eraser) to clear the ENG 1819 code from the ECU memory. Start the engine to verify the repair.