B0248

Schematic:

CIRCUIT DESCRIPTION
The HTR/DEF/AC door motor is an electronic actuator stepper motor. When the airflow is from the panel, the voltage is high. When the airflow is from the defrost outlet, the voltage is low. The IPM controls the HTR/DEF/AC door motor position to direct airflow from the outlets selected by the vehicle occupants.

CONDITIONS FOR RUNNING THE DTC
The ignition is turned ON.

CONDITIONS FOR SETTING THE DTC
The IPM detects the signal circuit is less than 0.03 V (2 counts) or greater than 4.94 V (253 counts).

ACTION TAKEN WHEN THE DTC SETS
^ A default value of 2.5 V (128 counts) will be used for the sensor data by the IPM.
^ The air inlet door will be set to the outside air position.
^ The IPM will only direct airflow from either the panel or defrost outlets.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The DTC will become history if the IPM no longer detects a failure.
^ The history DTC will clear after 50 fault free ignition cycles.
^ The DTC can be cleared with a scan tool.

TEST DESCRIPTION

Steps 1-8:

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 high voltage range.