John Deere 18: Coolant Temperature Input Voltage too High

The system has detected that the input voltage for the coolant temperature sensor is higher than expected. This may indicate an issue with the sensor signal or the electrical circuit supplying power to it.

1. 1

   The wiring and connections related to the coolant temperature sensor

2. 2

   The voltage supply to the coolant temperature sensor circuit

1. 1

   Inspect

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

2. 2

   Test

   Test the voltage supply to the coolant temperature sensor circuit using a multimeter to confirm it is within the expected range.