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Ambient Temperature Sensor

  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 336.6 kilohms. At 60°C (140°F), the sensor resistance is 2.49 kilohms. The sensor resistance should read between these two values. If OK, refer to AMBIENT TEMPERATURE SENSOR CIRCUIT  . If not OK, replace the faulty ambient temperature sensor.
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