B0441

Schematic:

CIRCUIT DESCRIPTION
The heater-A/C control receives a left electric actuator position signal from the left electric actuator. The left electric actuator position sensor is a potentiometer that is tied to a 5V 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 1218 (BRN/WHT) to a pull-up resistor in the heater-A/C control. This signal relates to the position of the left electric actuator. This signal is used in order to determine the necessary drive signal to the left 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 left electric actuator position and determines the left electric actuator is out of range.

ACTION TAKEN WHEN THE DTC SETS
The heater-A/C control stores DTC B0441 in memory.

CONDITIONS FOR CLEARING THE DTC
Under all fault conditions, the ignition switch must be cycled from on to off, 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 B0441 to set:
^ A voltage spike in circuit 1218 (BRN/WHT)
^ A short to ground in circuit 1217 (PNK/BLK)
^ A short to B+ in circuit 1218 (BRN/WHT)
^ An open in circuit 61 (YEL), circuit 1217 (PNK/BLK) or circuit 1218 (BRN/WHT)

TEST DESCRIPTION

Steps 1-13:

The number(s) below refer to the step number(s) on the step diagnostic table.
2. This test checks if the heater-A/C control 5V supply is getting through circuit 1217 (PNK/BLK).
3. This test checks if the heater-A/C control 5V supply is getting through circuit 1218 (BRN/WHT).
4. This test checks if the heater-A/C control ground is getting through circuit 61 (YEL).

For a description of the RPO Code(s) shown in this article/image, refer to the RPO Code List found at Vehicle/Application ID Application and ID