Front Heat Problems!!
09-12-2011 | 06:17 PM
#41
Registered User
Joined: Feb 2007
Posts: 1,262
Likes: 2
From: New Jersey and Sao Paulo
The FSM refers to them as servomotors, even if "manual":
http://www.ncttora.com/fsm/1996/SIL/...eauni/comp.pdf
So while I understand that this is contradictory, I'm just going to call them servomotors. They may or may not provide closed loop feedback, but they do provide position feedback.
There are supposed to be 2 temp sensors but I didn't spot those, any help in locating them is appreciated.
Unfortunately I don't have any temperature display, or do I? Will the odometer give me a temp?
http://www.ncttora.com/fsm/1996/SIL/...eauni/comp.pdf
So while I understand that this is contradictory, I'm just going to call them servomotors. They may or may not provide closed loop feedback, but they do provide position feedback.
There are supposed to be 2 temp sensors but I didn't spot those, any help in locating them is appreciated.
Unfortunately I don't have any temperature display, or do I? Will the odometer give me a temp?
Last edited by TheDurk; 09-12-2011 at 06:18 PM.
09-13-2011 | 06:34 AM
#42
Registered User
Joined: Feb 2009
Posts: 134
Likes: 0
From: Maine
I wish I had cable actuated flapper doors! Why replace a design that works, huh?
First, I think it's best to know what you'll be looking at (for the 2001 "manual A/C" climate controls). Let's list the motors and what they do:
1. Driver's side footwell, this is a multi-position "air out" motor that directs the air to each vent, depending on switch position.
2. Passenger's side footwell, underneath stereo. Variable position "air/temperature mix", depending on slider position.
3. Passenger's side footwell, above fan. 2 position motor that will pull air from inside or outside the vehicle, depending on if the Recirculation button is depressed.
On to pics, each motor should respond in some way to the climate controls.
1. Switching the Vent position should have this shift the levers each time:
2. Air/Mix motor. Sliding the temp knob, should make this arm rotate about 45 degrees:
3. Recirculation motor. Press the Recirc. button and this flapper should move towards the engine. Turning it off will cause the flapper to move towards you, shutting off cabin air:
First, I think it's best to know what you'll be looking at (for the 2001 "manual A/C" climate controls). Let's list the motors and what they do:
1. Driver's side footwell, this is a multi-position "air out" motor that directs the air to each vent, depending on switch position.
2. Passenger's side footwell, underneath stereo. Variable position "air/temperature mix", depending on slider position.
3. Passenger's side footwell, above fan. 2 position motor that will pull air from inside or outside the vehicle, depending on if the Recirculation button is depressed.
On to pics, each motor should respond in some way to the climate controls.
1. Switching the Vent position should have this shift the levers each time:
2. Air/Mix motor. Sliding the temp knob, should make this arm rotate about 45 degrees:
3. Recirculation motor. Press the Recirc. button and this flapper should move towards the engine. Turning it off will cause the flapper to move towards you, shutting off cabin air:
09-13-2011 | 12:54 PM
#43
Registered User
Joined: Feb 2009
Posts: 134
Likes: 0
From: Maine
Other pics:
Getting to the back screw:
Temp mixer In the Cold position:
Temp mixer apart:
Vent Control:
Vent Control apart:
Recirculation Motor:
And the mystery with the Temp Mix Motor, the resistance checks are reverse of what the should be according to the manual:
Getting to the back screw:
Temp mixer In the Cold position:
Temp mixer apart:
Vent Control:
Vent Control apart:
Recirculation Motor:
And the mystery with the Temp Mix Motor, the resistance checks are reverse of what the should be according to the manual:
04-15-2012 | 06:57 PM
#44
Registered User
Joined: Jun 2009
Posts: 38
Likes: 0
Hi-
After opening my servo motor and turning the gear I found that my arm was still a few teeth off and not giving me full heat. This is of course because with the gears stripped there is no telling what what the exact position of it is supposed to be only what it was when you took it apart. Just something to be aware of. As long as its close a little bit of trial and error will get it adjusted right.
My linkage also seemed a bit tight to turn by hand. Has any one had their motor fail a second time? I will try lubing the heater control cable but fear its not going to be enough and my motor will just strip out again.
After opening my servo motor and turning the gear I found that my arm was still a few teeth off and not giving me full heat. This is of course because with the gears stripped there is no telling what what the exact position of it is supposed to be only what it was when you took it apart. Just something to be aware of. As long as its close a little bit of trial and error will get it adjusted right.
My linkage also seemed a bit tight to turn by hand. Has any one had their motor fail a second time? I will try lubing the heater control cable but fear its not going to be enough and my motor will just strip out again.
Last edited by Hawkflyer; 04-15-2012 at 06:59 PM.
02-03-2014 | 08:36 PM
#45
Registered User
Joined: Feb 2014
Posts: 1
Likes: 0
Nat2500 - thanks man. Fixed my ride in about 1/2 hr. 
Just bought my 4Runner over the weekend in Nashville, and had to ride 8 hrs back with an incessant clicking and hot air blowing on me. This was a great little tutorial! Happy trails. - C
Just bought my 4Runner over the weekend in Nashville, and had to ride 8 hrs back with an incessant clicking and hot air blowing on me. This was a great little tutorial! Happy trails. - C
02-01-2015 | 11:50 AM
#46
Registered User
Joined: Jul 2011
Posts: 2
Likes: 0
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