RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Road Temperature Sensor: Testing and Inspection
Ambient Temperature Sensor Test
1. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the ambient temperature sensor wire
harness connector.
2. Measure the resistance of the ambient temperature sensor. At -40 °C (-40 °F), the sensor resistance is 336 kilohms. At 55 °C (140 °F), the sensor
resistance is 2.488 kilohms. The sensor resistance should read between these two values. If OK, refer to Diagnosis and Testing - Ambient
Temperature Sensor Circuit in this group. If not OK, replace the faulty ambient temperature sensor.
