B0162

Diagnostic Chart:

CIRCUIT DESCRIPTION
The DIC applies 5 Volts to the ambient air temperature sensor. The ambient air temperature sensor is a thermistor which will vary in resistance with temperature change. As the resistance of the ambient air temperature sensor increases, the DIC senses a larger voltage drop across the sensor, indicating a lower temperature. As the resistance of the ambient air temperature sensor decreases, the DIG senses a small voltage drop across the sensor, indicating a higher temperature.

CONDITIONS FOR RUNNING THE DTC
The DIC must be fully operational within a continuous voltage supply of 9.0-16.0 volts.

CONDITIONS FOR SETTING THE DTC
The DIC detects that the temperature is less than -40 °C (-40°F) for more than 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
OC is displayed by the DIC in the compass/temperature mode when the condition is present.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will become history when the DIC no longer detects a failure.
^ The history DTC will clear after 100 fault free ignition cycles.
^ You may clear the DTC with a scan tool.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
3. Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.