I'm getting a DTC B0441 Left Actuator Out of Range . What is a actuator? I have also been getting a DTC B0361 Left Actuator Feedback Short to GND . That is when it seems to be blowing fuse 19. When the fuse blows, I get a ton of codes.Sometimes when I replace the fuse it blow it as sone as youe start the car. Then sometimes it will drive fine for awhile. Any thoughts? What is the actuator?

 

In order to heat/cool the interior of your car, the HVAC control module sends air through the heater or air conditioner cores. At Maximum Heat all the air is directed past the heater core, and at Maximum Cool all the air is directed past the AC core. At moderate temperatures between these extremes, some of the air is sent through the heater core, while some of the air is sent through the AC core. The fraction sent through the heater / AC depends on the interior temperature you select.

Movement of a "door" changes the air flow fraction through heater / AC.

This "door" is controlled by the Air Temperature Actuator. Air temperature actuators are 5-wire bi-directional electric motors that contain Ignition 3 Voltage, low reference, control, 5-volt reference, and position signal circuits.

When the actuator is at rest, the control circuit voltage is 2.5 volts. A 0 or a 5 volt control signal commands the actuator to move in opposite directions. As the actuator shaft rotates, the door's position signal circuit changes from 0 to 5 volts.

The HVAC module changes this position signal voltage to a 0-255 count index. The HVAC module also uses a 0-255 count index to command the actuator position.

Once the position signal and the commanded value are the same the control module changes the control signal to 2.5 volts, thus stopping the motor.

I think the short to ground DTC points to the problem source. The short to ground would indicate no feedback to the HVAC module as to what the position of the door was.

Whenever HVAC control module keep alive memory power is interrupted (blown fuse perhaps) the HVAC Control Module will attempt to recalibrate the actuators. If the actual travel range is not within the calibrated amount, DTC B0441 will be set.

Looks like a scan tool would be handy to run the fault schematic.

Sorry, not much help.

 

Thanks Mapman. My problem is that fuse #19 under the hood keeps blowing.Then I get a bunch of codes. After I clear all the codes, thas is the one I keep getting.Just dread going to the dealer.

 

I guess we need a new "Smilies", one for the "dreaded trip to the dealer".