B0332

DTC B0332 Ambient Outside Air Temperature Sensor Circuit Is Shorted To Ground:

CIRCUIT DESCRIPTION
The heater-A/C control receives an outside air temperature input from the ambient air temperature sensor through circuit 735. The ambient air temperature sensor is grounded through circuit 61 to a sensor ground input in the heater-A/C control. This signal is used to display the outside air temperature on the heater-A/C control display and to determine the control of the vacuum solenoids. This value is stored in Keep Alive Memory (KAM) of the heater-A/C control.

CONDITIONS FOR SETTING THE DTC
^ The heater-A/C control will perform an internal check on the operation of the ambient air temperature sensor.
^ The heater-A/C control detects a fault to ambient air temperature sensor which may or may not be caused by an external fault.

ACTION TAKEN WHEN THE DTC SETS
Stores a DTC B0332 in the heater-A/C control memory.

CONDITIONS FOR CLEARING THE DTC
^ Under all fault conditions, the ignition must be cycled before this DTC can change from current to history.
^ A history DTC will clear after 100 drive cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ The following conditions may cause a malfunction to occur:
- A voltage spike in circuit 735.
- A short to ground in circuit 735.

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
1. Always perform the heater-A/C control diagnostic system check before attempting to diagnose a DTC B0332.
2. This check determines if the short to ground is in the heater-A/C control or circuit 735.
5. Always clear DTCs after a repair procedure is complete.