New Holland 3814: ECU Temperature Sensor SPI Error

The ECU temperature sensor is reporting an SPI error, indicating a communication issue with the sensor. This fault is specifically related to the ECU temperature sensor (LM71).

1. 1

   The ECU temperature sensor (LM71) connections

2. 2

   The wiring between the ECU temperature sensor (LM71) and the controller

3. 3

   The integrity of the SPI communication circuit

1. 1

   Inspect

   Check the physical connections of the ECU temperature sensor (LM71) for looseness, corrosion, or damage.

2. 2

   Test

   Use a multimeter to verify continuity and proper voltage in the wiring between the ECU temperature sensor (LM71) and the controller.

3. 3

   Verify

   Confirm that the SPI communication circuit is functioning correctly according to the service manual.