2011 SRX, need to change replace gear that opens and closes mode door on HVAC system. Anybody done this before?

From reading your letter it sounds like a problem I had with my Jaguar X-Type. My problem turned out to be a broken blend door inside the heater box. I replaced it and has been working since. Good luck with yours.

unknown --fixya not mind readers -would need info on what your vehicle is

When you change the mode from floor to vent to defrost do you hear switching taking place behind the dash or inside ?

Air Delivery Improper

Test Description
The numbers below refer to the step numbers on the diagnostic table.
The measured voltage should be near the specified values for each mode position.
The HVAC control module is supplied by two ignition 3 voltage circuits. Test the ignition 3 voltage circuit that does not supply the blower motor switch.
Step
Action
Value
Yes
No
Schematic Reference: HVAC Schematics
Connector End View Reference: HVAC Connector End Views
DEFINITION: Air does not flow correctly from the air distribution outlets.
1
Did you perform the HVAC Diagnostic System Check?
--
YES - Go to Step 2
NO - Go to Diagnostic System Check - HVAC Systems - Manual
2
Turn ON the ignition, with the engine OFF.
Place the blower motor switch in the OFF position.
Is the blower motor OFF?
--
YES - Go to Step 3
NO - Go to Blower Motor Always On
3
Place the blower motor switch in each speed position.
Does the blower motor operate at all?
--
YES - Go to Step 4
NO - Go to Blower Motor Inoperative
4
Does the blower motor operate in each speed position?

YES - Go to Step 5
NO - Go to Blower Motor Malfunction
5
Except for the blower motor speed, are all of the functions of the HVAC control module inoperative?
--
YES - Go to Step 14
NO - Go to Step 6
6
Place the blower motor switch in the maximum speed position.
Place the mode switch in the vent position.
Place the recirculation switches in the recirculation position and in the outside air position.
Does the recirculation door move to the correct position for each selection?
--
YES - Go to Step 7
NO - Go to Air Recirculation Malfunction
7
Place the blower motor switch in the maximum speed position.
Place the mode switch in each position.
Is the air flow sufficient from the correct outlets in each mode?
--
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 8
8
Inspect the air distribution system for the following conditions:
• A dirty HVAC air filter, if applicable
• An obstruction to the air flow
• Air leaks
• Misaligned air ducts
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 9
9
Inspect the mode door and the mode actuator for the following conditions:
• A misaligned mode actuator
Refer to Mode Actuator Replacement .
• Broken or binding linkages or mode door
• An obstruction that prevents the mode actuator from operating within its full range of motion
• Missing seals to the mode door
• Misaligned seals to the mode door
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 10
10
Turn OFF the ignition.
Disconnect the mode actuator.
Turn ON the ignition, with the engine OFF.
Probe the ignition 3 voltage circuit of the mode actuator with a test lamp that is connected to a good ground.
Does the test lamp illuminate?
--
YES - Go to Step 11
NO - Go to Step 20
11
Test the ground circuit of the mode actuator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 12
12
Measure the voltage from the mode door control circuit of the mode actuator to a good ground.
Place the mode switch in each mode position while observing the voltage.
Does the voltage measure near the specified values for each mode position?
Vent 0.2V, Bi-Level 3.0V, Floor 6.0V, Mix-Blend 9.0V, Defrost 12.0V
YES - Go to Step 18
NO - Go to Step 13
13
Test the mode door control circuit of the mode actuator for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 19
14
Test the ignition 3 voltage circuit of the HVAC control module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 15
15
Test the battery positive voltage circuit of the HVAC control module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 16
16
Test the ground circuit of the HVAC control module for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 17
17
Test the off blower motor control circuit of the HVAC control module for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
--
YES - Go to Step 23
NO - Go to Step 19
18
Inspect for poor connections at the harness connector of the mode actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
--
Go to Step 23
Go to Step 21
19
Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
--
Go to Step 23
Go to Step 22
20
Repair the ignition 3 voltage circuit of the mode actuator. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
--
Go to Step 23
--
21
Replace the mode actuator. Refer to Mode Actuator Replacement .
Did you complete the replacement?
--
Go to Step 23
--
22
Replace the HVAC Control module. Refer to HVAC Control Module Replacement .
Did you complete the replacement?
--
Go to Step 23
--
23
Operate the system in order to verify the repair.
Did you correct the condition?
--
System OK
Go to Step 8

Air Distribution
The HVAC control module controls the distribution of air by the use of a defrost actuator and a mode actuator. The modes that may be selected are:
?€¢
Defrost

?€¢
Defog

?€¢
Panel

?€¢
Bi-Level

?€¢
Floor

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

2

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, command the appropriate HVAC door actuator ON and OFF while observing the corresponding Door Actual parameter.

Does the scan tool indicate that the value of the appropriate Door Actual parameter changes?
Go to Diagnostic Aids
Go to Step 3

I would

topic HVAC?
Hvac " blend door, "
that part is bad, stuck or parts fell off. or broke inside.
or the door is jammed some way, cause overload of this servo.

to discover facts like this, one has to look.
(vacuum sys. cable or motor drive, some cars all 3 or 2 of 3)
newer cars use motor drive only...
did you look at it first? (if a motor drive looking is useless)
many new cars this is a blend door motor.
with cheap plastic gears inside. (a black box with wires)
some need to be recalibrate , simple steps in the FSM.

FSM IS, oem factory service manual.....
read that. and its all there, every step....

did you scan it first. to see if there are DTC errors for HVAC?
https://www.techauthority.com/en-US/Pages/Home.aspx

The blower motor is probably not working.

I found that the 97-99 ST204 Celica uses the same Alpine alarm used by the BMW E23 so I tried the instructions for that and it worked, so if anybody else needs this info here it is

My remote is P/N 08191-00900

1. Close all doors, trunk, and hood.
2. The security system must be in "disarm" mode. The key must be removed from the ignition key slot.

Enter Code-Learning Mode
3. Open the trunk and leave it open.
4. Open the driver's door and sit in the driver's seat.
5. Close the driver's door.
6. Cycle the ignition switch five times between the "off" position and position 2 (ignition "ON", all dash warning lamps will illuminate). The red status LED will illuminate continuously, and the siren will "chirp" once, to indicate that the code-learning mode has been initiated.

DO NOT START THE ENGINE

The ignition switch cycling in step #6 must be performed within ten seconds.

The sequence in steps #1-6 must be performed within 45 seconds.

Registering/Delete ID Code(s)
7. Open driver's door, (remain seated in driver's seat)
8. Close driver's door.
Edit: an extra step is required here for the Celica- cycle the ignition key once more from off to ignition on then back to off
9. Press and release any button on the remote you wish to register into the system. The status LED will shut off momentarily to indicate that one ID code has been registered.
10. Repeat steps 7 through 9 to register the remaining three ID codes.

Exiting Code-Learning Mode
11. Open driver's door, and exit from vehicle, leaving the door opened.
12. Close trunk.
13. Close driver's door. The LED will turn off and the siren will "chirp" twice.
14. The initialization procedure is now completed, test all remotes to confirm operation

For 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:----
drivers side front door will not open from inside or outside?

http://technoanswers.blogspot.com/2012/01/ford-f-350-crew-cab-drivers-side-front.html

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Car door will not close?
http://howtobyme.blogspot.com/2011/11/car-door-will-not-close.html

--------

All power door locks not working ?
http://howtobyme.blogspot.com/2011/11/all-power-door-locks-not-working-on_14.html

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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html
---------------
How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html

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Vehicle door panel components?

http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html

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Truck Door will not close?

http://schematicsdiagram.blogspot.com/2011/12/ford-truck-door-will-not-close.html

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Where is Cars Door control Module located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-cars-door-control-module.html

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Power door locks not working?

http://schematicsdiagram.blogspot.com/2011/12/power-door-locks-not-working.html

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Door ajar light stays on?

http://technoanswers.blogspot.com/2012/01/door-ajar-light-stays-on.html

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Door locks not working?

http://technoanswers.blogspot.com/2012/01/door-locks-not-working-on-ford-explorer.html

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Front Door dis-assembly diagram?

http://repairhelpcenter.blogspot.in/2012/02/front-door-dis-assembly-diagram-for.html

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Rear Door dis-assembly diagram?

http://repairhelpcenter.blogspot.in/2012/02/rear-door-dis-assembly-diagram-for.html

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How to test Power door locks?

http://repairhelpcenter.blogspot.in/2012/02/how-to-test-power-door-locks.html

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Doors will not open with Remote?

http://schematicsdiagram.blogspot.in/2012/02/lexus-doors-will-not-open-with-remote.html

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How to replace Door Hatch ?
http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-hatch-on-acura-integra.html

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How to remove Doors?

http://repairhelpcenter.blogspot.com/2011/11/how-to-remove-doors-on-acura-integra.html

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How to Replace Doors?
http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-doors-on-audi-a4-and-vw.html

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Remote will not unlock Rear door?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html

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Door locks or windows not working on car?
http://schematicsdiagram.blogspot.com/2011/07/door-locks-or-windows-not-working-on.html

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This will help.

Thanks.

The 2001 model Aztex has 2 cabin filters, they usually come 2 to a box when you buy them.
The charcoal carbon filters are the best.

Removal:

•Open the IP compartment door.
•Remove the rear inside IP compartment door.
•Open the HVAC module assembly access door
•Remove the RH passenger compartment air filter from the HVAC module.
•Slide the LH passenger compartment air filter to the HVAC module opening.
Remove the LH passenger compartment air filter from the HVAC module.

Installation Procedure:

•Install the LH passenger compartment air filter into the HVAC module opening.
Slide the LH passenger compartment air filter toward the left side of the HVAC module.
•Install the RH passenger compartment air filter into the HVAC module opening.
•Close the HVAC module assembly access door.
•Install the rear inside IP compartment door.
•Close the IP compartment door.

I Hope this information is helpful.

did you check the vacuum source of all heater controls inside the dash? maybe the actuating door valve has a leak due to an air line. also the selector mode switch could be bad