DTC 010

Diagnostic Trouble Code Chart:

Wiring Schematics:

CIRCUIT DESCRIPTION
The Ambient Air Temperature Sensor is a thermistor that controls signal voltage to the HVAC programmer. The HVAC programmer supplies voltage on circuit 735. When the sensor is cold, the resistance is high and the HVAC programmer will sense a high signal voltage at terminal F8 (Buick, Oldsmobile) or terminal D8 (Pontiac). When the sensor warms, resistance is reduced and the signal voltage is pulled low through circuit 1704. Signal voltage will vary from 5 V (open circuit) to 0 V (short circuit).

CONDITIONS FOR SETTING THE DTC
^ The ignition is ON.
^ Circuit open or shorted.Action Taken When the DTC Sets
^ A blank is displayed on the drivers information center.
^ A default value of 15°C (59°F) will be used by the HVAC programmer to allow operation of the A/C system.

CONDITIONS FOR CLEARING THE DTC
^ Using a Scan Tool.
^ A history DTC will clear when 40 consecutive ignition cycles have occurred without a malfunction.
^ HVAC programmer battery voltage is interrupted

TEST DESCRIPTION
3. Ensures that the DTC was not set in error.