simonhong

All of sudden, airflow thru all vents of my 04 TL is gone. I tried to increase and decrease air, nothing comes out from the vents. I also tried to turn off and turn on the climate control system, but had no luck getting airflows from vents. after I searched from acurazine forum, I think it's my blower motor or cabin air filter.

does anyone have pictures or detail explanation for replacing blower motor? I went to local acura dealership and they wanted to charge me $160 for dignosis of blower motor. I didn't do it.

When I turned the climate system back on I hear some kind of pushing noise from the vents, but still no airflow
Any suggestions will be appreciated.

Thank you,

tuanrich

Have you check on the fuse yet? Hpefully just simple one to fix.

simonhong

yes, I checked the fuse boxs both under the hood and inside of car and all fuses look good.

fog is generated on car windows when it rains. I have to keep the sunroof open in order to circulate cold air preventing fog on windows.

nfnsquared

Recheck fuse # 30 (7.5A) in the underdash fuse box.

KN_TL

iTrader: (3)

Did you check the fuses with a continuity tester? It is sometimes hard to visually determine if it's open unless it is totally fried.

nfnsquared

Hey, don't mean to insult your intelligence, but did you actually pull the fuses out and look at each one? You can't tell just by looking at the fuse box. Do you know what a bad fuse looks like? Again, not insulting you, just making sure you know what to look for.

Pull fuse # 30 from the underdash fuse box (use the yellow fuse puller that is in the underhood fuse box) and inspect it. There will be a visible break in the "V" part of the fuse. Heck, even if it looks good, replace it with a new fuse and then check your blower

Inaccurate

+1

As a standard practice, I don't even rely on a visual inspection (with fuse in hand). And, no jokes about my over-40yrs vision.

I learned back in my early days to only trust a DVM (digital volt meter). Use the continuity mode of the DVM to see if the fuse is ok.

I have seen fuses that visually looked ok, but were blown.

Inaccurate

Forgot to add

Because you have a 2004, there is a good chance that your blower motor is worn-out. It is common for blower motors to just suddenly refuse to begin turning as the motor gets old. I am placing my bets that this is your problem.

The manual does not specifically tell how to remove just the motor, but I think it is super easy (not actually having done it myself).

Remove the kick panel from under the dash on the passenger side (the area at passenger's knees and feet). You will then easily see the blower motor. Disconnect the wiring connector. Remove the screws/bolts that are highlighted in yellow in the pic below. Then just R&R... Remove old motor and Replace with new motor. Reassembly. Done.

simonhong

Thank you all for providing useful information here.
I tried with a new #30 fuse (7.5A) but had no luck.
I will order the blower motor unit from www.acuraoemparts.com to replace it

Does anyone know what part number i should order?
I got part number 79305-SDN-A01 called "Blower sub-assy"
Is this the right one to order?

Also i just got the service manual today.
does anyone know how i can find right part number whenever I need to order parts?

I will let you guys know if my problem is solved after replacing blower motor

Thank you so much!

nfnsquared

Well, hang on before you spend $$. Now that we know it's not fuse #30, check fuse #9 in the underhood fuse box. Then run the HVAC diagnostics test on pg 21-9 of the service manual and see if it give you any codes.

It may very well be a bad blower motor, but I'd rule out other stuff first. In addition, the blower motor has a resistor that can burn out while the motor is in perfect working order. It could be you only need to replace the resistor.

simonhong

Actually I found out a self-diagnostic function for the climate control unit from the service manual.
I don't know how i can put a image of the service manual

I did run the self-diagnostic function for the climate control

and I got an error segment "S" which is "A problem in the blower motor circuit"

it's the page number 21-9, 21-10 from the service manual

I'm positive that it's the blower motor problem

thanks,

simonhong

How would i check if the resistor is the only problem?
do you have part number for that?
Thanks

nfnsquared

Sorry, can't help on that. I had the resistor burn out because a rodent was living in my ducts and a bunch of crap that it collected fell down into the squirrel cage and cause the resistor to burn out. The resistor, as I understand it, is designed to save the blower motor in case the squirrel cage gets hung up. This was all done by the dealer. I looked but couldn't find my receipt.

There are a couple of fairly easy steps you can do on pg 21-44 to single out or rule out the blower motor.

If you go ahead and pull the motor, you might be able to visually inspect the resistor and/or put power to the blower motor leads to see if the motor runs.

The parts dept should be able to give you a good part # for the blower and/or resistor.

simonhong

Ok, I did search online little bit and found this acura part website called www.acuraautomotiveparts.org

and if you go to the link listed below you will be able to see the parts and pictures

http://www.acuraautomotiveparts.org/...s=&view=normal

When I search with Keyword "blow" I get two results for the blower motor "BLOWER SUB-ASSY" and "MOTOR ASSY., FAN"
Should I replace with "blower sub-assy" (whole thing) part number: 79305-SDN-A01

or "Motor assy, fan" (just fan portion) part number: 79310-SEP-A02 ?

I don't see part related with resistor in blower motor part section. where is the resistor located at? I am having difficulty finding resistor

I took the blower motor out and How can I test whether the motor unit is working or not?

Thank you

nfnsquared

If you're going to replace the motor, I'd guess you need #2: 79310-SEP-A02.

You should be able to hook a power wire and ground to the motor where you removed the power connector.

I have no idea where the resistor is on the motor. It's probably near where the power cord connects. Sorry.

Two other parts links: http://oemacuraparts.com/ and http://www.acuraoemparts.com/

Inaccurate

simonhong

Ok, I got the part delivered today and installed
but had no luck solving my problem
I put everything back on except for the new blower motor part
Can someone help me with this issue?

I looked at the service manual pg 21-44. but i don't know what to do next.
All of the fueses mentioned above work ok and I'm confident with that because I switched fuses back and forth for testing.

I'm thinking about taking my car to local acura dealership.

Any opinion?

nfnsquared

Well, as indicated by the diagnostic test, you have a fault in the blower motor circuit. There are additional steps in the service manual you can run to check the various parts of the circuit. You could have saved yoursefl the trouble of ordering the blower motor had you run these steps. Other than that, looks like it's dealer time.

Inaccurate

Well hell. Sorry to hear that the new motor didn't fix it.

What are you going to do with the new motor? Because it is $60, you might as well just install the new motor instead of paying returning shipping cost.

simonhong

I took my car to the local acura dealership. and they found out that power transistor was the problem. after they replaced the power transistor, everything works fine now.

Part number was 79330-S6M-941
I paid Part $69.96 and loabor $163.50
If I knew what was wrong with my car, I would have ordered thru www.acuraoemparts.com then I would have spent only $37.75 for just replacing the transistor.

I hope any TL owners would benefit by seeing this thread
Thank you all for help

and I decided to keep the new blower motor anyway. it works great!

simonhong

Oh, The power transistor is located left side of blower motor after removing the passenger's dashboard lower cover.

You can find good pictures from Acura service manual
Pg. 21-5, pg.21-66, pg-21-67

the power transistor is held by two screws

I think resistor that member "nfnsquared" actually meant power transistor

Inaccurate

Thanks for the follow-up Simon.