Question about 2011 Cadillac SRX
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Posted on Jan 02, 2017
SOURCE: hvac doors not working
Its probably the vaccum line. Check again. There is a small thin one that crosses over the top of the engine and fails/leakes/cracks in the area where it is hard to see. Repalcing the vaccum lines for $10 is the place to start. Then see what happens. While the engine cover is off, go ahead and change the PCV valve and give the engine a quick check for any other loose connections or issues.
Posted on Dec 28, 2008
Will the remotes work in the garage? If yes but not outside with the door closed you might have radio interferace with your remotes. You might have to chage to a your reciever and remotes to a different brand (frequency). Sometimes it is less trouble to change out the operator. Chamerlain changed frequency from 390 (old) to 315 (new).
Posted on Jan 02, 2009
Unplug the unit and remove the cover, usually eight screws, if you see a lot of white dust in the cover check the nylon drive/worm gear, they will need to be replaced.
Posted on Apr 11, 2009
Please make sure you don't have broken springs first and that the door is balanced properly. If so you can replace the "Trolly" by disconnecting the arm from the opener, undoing the opener from the bracket that mounts it to the wall. This usually takes a 1/2 in wrench. Then swing the opener out far enough to slide the trolly off and replace it with a new one. Re-connect everything then re-engage the trolly.
Posted on May 19, 2009
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Mar 14, 2017 | Mini Cars & Trucks
The mode and defrost actuators are connected to the mode and defrost doors by a cam type linkage system. Depending on the position of the door, air is directed through the HVAC module and distributed through various ducts leading to the outlets in the dash. If the HVAC control module detects a fault with the mode or defrost doors the HVAC control module will try to drive the actuator for a predetermined amount of time, to defrost, which is the defaulted position for the mode and defrost door actuators. When the mode switch is placed in the defrost or defog positions the A/C is commanded on and the recirculation door is moved to the outside air position to help reduce window fogging. A/C is available in all modes and recirculation is only available in the panel and bi-level modes.
Circuit Description The following DTCs are for the HVAC door actuators: ?€¢
B0248 is for the defrost actuator.
B0263 is for the mode actuator.
B0408 is for the left air temperature actuator.
B0418 is for the right air temperature actuator.
The HVAC control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of a stepper motor, a logic circuit, and a potentiometer. The potentiometer inside the door actuator allows the module to monitor the current position of the actuator drive shaft. The logic circuit inside the actuators receives control signals from the HVAC control module and controls the internal stepper motor. When a door positional change is required, the HVAC control module calculates a commanded door position. The module compares the commanded door position to the actual door position and determines the needed direction of motor rotation. The module applies a signal voltage to the door control circuit that is an input to the internal logic circuit of the door actuator. A 5 volt signal increases the door position. A 0 volt signal decreases the door position. When the commanded door position is equal to the actual door position, the HVAC control module sends a 2.5 volt signal to the door actuator and motor rotation stops. The ignition 3 voltage circuit provides source voltage to the logic circuit. The module provides ground to the actuator logic circuit through the low reference circuit. I would start by having the HVAC control module checked for DTC'S -diagnostic trouble codes First . Then check the system by using scan tool data . 1
Did you perform the HVAC Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - HVAC Systems - Manual
Go to Diagnostic Aids
Go to Step 3
Apr 02, 2016 | 2003 Chevrolet TrailBlazer
Jun 08, 2015 | 2011 Jeep Wrangler Unlimited Sport
Mode Door Replacement
Recirculation Door Replacement
Is the repair complete?
Go to Step 18
Replace the vacuum actuator. Refer to the appropriate repair.
Defroster Valve Actuator Replacement
Mode Actuator Replacement
Recirculation Actuator Replacement
Is the repair complete?
Go to Step 18
Replace the HVAC control vacuum valve. Refer to HVAC Control Vacuum Valve Replacement .
Is the repair complete?
Go to Step 18
Cycle the HVAC controls through all modes to verify proper operation.
Did you correct the condition?
Hope this helps an good luck !
May 08, 2015 | 2002 Chevrolet Impala
Feb 19, 2015 | 2011 Jeep Liberty
The mode door actuators are reversible, 12-volt direct current (DC) servo motors. The heating-A/C systems on this vehicle use two mode door actuators. One for the panel/floor-air door and one for the defrost-air door.
All actuators (1) are interchangeable with each other. Each actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle (2). Each actuator also has an identical output shaft with splines (3) that connects it to its respective door linkage and three integral mounting tabs (4) that allow the actuator to be secured to the HVAC housing. The mode door actuators do not require mechanical indexing to the mode-air doors, as they are electronically calibrated by the A/C-heater control.
The mode door actuators are connected to the A/C-heater control through the vehicle electrical system by dedicated two-wire leads and connectors of the HVAC wire harness. The mode door actuators can move the defrost-air door and the panel/floor-air door in two directions. When the A/C-heater control pulls the voltage on one side of the motor connection high and the other connection low, the mode-air door will move in one direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the mode-air door moves in the opposite direction.
When the A/C-heater control makes the voltage to both connections high or both connections low, the mode-air door stops and will not move. The A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the mode door actuators and the mode-air doors. The A/C-heater control learns the mode-air door stop positions during the Actuator Calibration procedure and will store a Diagnostic Trouble Code (DTC) for any problems it detects in the mode door actuator circuits.
The mode door actuators are diagnosed using a scan tool (Refer to 28 - DTC-Based Diagnostics/HVAC - Diagnosis and Testing).
The mode door actuators cannot be adjusted or repaired and must be replaced if inoperative or damaged.
Jan 28, 2015 | 2006 Dodge Ram 1500
Oct 16, 2013 | 2009 Cadillac SRX
Doors not getting open with remote or key problem,there are help
links provided below.Click the link below to go through its
procedure and troubleshoot the problem:----
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This will help.
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