RAM 3500 Truck 4WD V10-8.0L VIN W (1997)
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Component Testing
Engine Coolant, Intake Air, And Transmission Temperature Sensor Specifications
1. Disconnect the wire harness connector from the coolant temperature sensor.
2. Test the resistance of the sensor with a digital volt-ohmmeter. The measured resistance should be less than 1340 ohms with the engine warm.
Refer to the above sensor resistance chart for exact values.
3. Replace sensor if it is not within the range of resistance specified in the chart.
4. Test the resistance of the wire harness. Check between the Powertrain Control Module (PCM) terminal 2 and the appropriate sensor connector
terminal. Also check between PCM 4 and the appropriate sensor terminal. Repair the wire harness if the resistance is greater than 1 ohm or if an
open circuit is indicated.
5. After tests are completed, re-connect electrical connector to sensor. Connector is symmetrical (not indexed); it can be installed to the sensor in
either direction.
