RAM 1500 Van V6-3.9L VIN X (1997)
Temperature Gauge: Description and Operation
System Operation
SYSTEM OPERATION
The coolant temperature gauge gives an indication of the engine coolant temperature. The coolant temperature sending unit is a thermistor-type
sensor that changes its internal electrical resistance with changes in the engine coolant temperature. The sending unit is installed in a threaded hole
that penetrates a coolant passage of the engine.
High sending unit resistance causes low coolant temperature gauge readings. Low sending unit resistance causes high coolant temperature gauge
readings. The sending unit resistance values are shown in a chart in Specifications.
