John Deere 19: Coolant Temperature Input Voltage too Low

The system has detected that the input voltage for the coolant temperature sensor is below the expected range. This may affect the accuracy of the coolant temperature reading and could lead to improper engine operation.

1. 1

   The wiring and connections to the coolant temperature sensor

2. 2

   The power supply to the coolant temperature sensor circuit

3. 3

   The sensor itself for proper function

1. 1

   Inspect

   Check the wiring and connections to the coolant temperature sensor for damage, corrosion, or loose contacts.

2. 2

   Test

   Verify the power supply to the coolant temperature sensor circuit using a multimeter.

3. 3

   Test

   Test the coolant temperature sensor for proper operation according to the service manual.