B0446

DTC B0446 Right Actuator Out Of Range:

CIRCUIT DESCRIPTION
The heater-A/C control receives a right electric actuator position signal from the right electric actuator. The right electric actuator position sensor is a potentiometer that is tied to a 5 V source through circuit 1217 (PNK/BLK) and to ground through circuit 61 (YEL), both from the heater-A/C control. The variable output from the potentiometer feeds back a position signal through circuit 1791 (YEL) to a pull-up resistor in the heater-A/C control. This signal relates to the position of the right electric actuator. This signal is used in order to determine the necessary drive signal to the right electric actuator motor in order to provide the proper air mix door position.

CONDITIONS FOR SETTING THE DTC
The heater-A/C control performs an internal check on the right electric actuator position and determines the right electric actuator is out of range.

ACTION TAKEN WHEN THE DTC SETS
The heater-A/C control stores DTC B0446 in memory.

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

DIAGNOSTIC AIDS
The following conditions may cause DTC B0446 to set:
^ A voltage spike in circuit 1791 (YEL)
^ A short to ground in circuit 1217 (PNK/BLK)
^ A short to B+ in circuit 1791 (YEL)
^ An open in circuit 61 (YEL), circuit 1217 (PNK/BLK) or circuit 1791 (YEL)

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. This test checks if the heater-A/C control 5 V supply is getting through circuit 1217 (PNK/BLK).
3. This test checks if the heater-A/C control 5 V supply is getting through circuit 1791 (YEL).
4. This test checks if the heater-A/C control ground is getting through circuit 61 (YEL).