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Where is Air Intake for Cabin Filter?

736 Views 21 Replies 7 Participants Last post by  Trolle
All that you see on top of the filter is fiberglass insulation from the roof of the garage. If you look at the second photo, you will see a little bit of the pink above the word AIR. That cavity goes back to the circular fan behind the filter and it was packed with what you see in the other picture. I hope one of you can tell me where the intake for the air is located because I can't find it. I have opened the hood and looked but can't see where except just under the windshield wipers. I would like to put some screening to keep the critters out. Thanks for your help.
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The cabin air filter is behind the glovebox. Easy to get to to swap out with the hardest part being getting all the junk back into the glovebox when you're done.
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The cabin air filter is behind the glovebox. Easy to get to to swap out with the hardest part being getting all the junk back into the glovebox when you're done.
Their photo shows the edge of the filter, in its location. They seem to be asking where the air intake is, so they can put a critter-excluding screen on it.
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Their photo shows the edge of the filter, in its location. They seem to be asking where the air intake is, so they can put a critter-excluding screen on it.
The air intake is at the base of the windshield on the driver's side of the car.
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Yes, I wondered about those vents, but how do mice get through those 1/4" square holes with lumps of fiberglass?
Also, there is a round fan behind the filter. It seems that the intake must be BELOW that fan as the filter cavity is above it, and airflow goes from there DOWN thru the filter and into the cabin. Or do I have that wrong?
Not sure, but I explained to my son (just a year driving under his belt) that under the rear end of the hood is a perfect place for the intake as the airflow over and up the windshield helps prevent a lot of debris/dirt from going into the intake…
Not sure, but I explained to my son (just a year driving under his belt) that under the rear end of the hood is a perfect place for the intake as the airflow over and up the windshield helps prevent a lot of debris/dirt from going into the intake…
You might visit a location with compressed air, and shoot some backwards, through the under-dash duct where the filter goes, and listen for its sound around and under the hood, and under the dash. Mice can get into small holes, but the smallest I'm aware of is about the size of a US dime. 1/4" seems awfully small.
There's also an HVAC drain that is relatively large. Mice can crawl in there. Not sure where this drain is located in the Clarity but in GMs it tends to be on the lower firewall in the engine bay.
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If someone here has access to the tech manuals on the Honda website, bring up a diagram of the complete ventilation system, that would help a lot.
If someone here has access to the tech manuals on the Honda website, bring up a diagram of the complete ventilation system, that would help a lot.
Many (most?) auto manufacturers have subscription services for their shop manuals now. Some sell a 24-48 hour pass for a relatively modest amount of money.

Might be worth exploring.
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I am also under the curse of critters attacking the Honda, the fresh air cabin filter had a collection of nut shells on top.

I don't like critters in the car so I took the plastic covers of on the bottom of the windshield, yep more signs of critters.

The air intake opening is there on the right side and it has no screening, however Honda does heve a flap that only opens when the system calls for outside air.

I am not sure if the critters just use the opening for nesting/eating but whatever they deposit in the opening will fall onto the cabin filter when the flap is opened.

Anyway, I put a 1/4 galvanized screen in there held on with duct seal.
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Well, that was a waste of $25 & 2 hours. There are 100s of articles, videos, updates to tech programs, dealer forms, electric flowsheets, machine setups, instructions for body work, painting or repairing a fuel door, and I doubt if anyone at the dealerships knows whatall is there. What I couldn't find was anything to do with ventilation.

But Trolle has come to our rescue, thank you. That hardware cloth looks like it was put on by a professional.
Did you have to take off the hood?
Well, that was a waste of $25 & 2 hours. There are 100s of articles, videos, updates to tech programs, dealer forms, electric flowsheets, machine setups, instructions for body work, painting or repairing a fuel door, and I doubt if anyone at the dealerships knows whatall is there. What I couldn't find was anything to do with ventilation.

But Trolle has come to our rescue, thank you. That hardware cloth looks like it was put on by a professional.
Did you have to take off the hood?
No, the hood swings almost straight up with plenty of room to work, thus the broom handle in picture 1. :)
It really is a simple job getiing it apart, the wiper motor on the right side is in the way but easy to remove with a couple of 6mm bolts holding it down.
Many (most?) auto manufacturers have subscription services for their shop manuals now. Some sell a 24-48 hour pass for a relatively modest amount of money.

Might be worth exploring.
Just to update you all on the subscription service at Honda (techinfo.honda.com).

The first hassle after you pay is that "Windows 10 Professional is currently the only operating system supported by i-HDS. Windows 11 is not supported at this time." Since I was working on a new laptop in my shop, I had to switch to the desktop in my office in another building. It was a Windows 10 Home version, but it worked fine.

As I mentioned above, the $25 gets you in to 100s, maybe 1000s, of articles, videos, machine setups, etc. - and it just kept loading more and more until I gave up. I downloaded some videos to individual browser tabs, all of which are gone this morning and a login for the subscription is in place of what was there. There were many PDFs, and if I could figure out how to upload a PDF here, I'd attach an example. Unfortunately, I just didn't have the time to read through each one to see which to keep, and after I left, by the end of the day, my computer had shut down, without saving most of them.

Some downloads were as simple as "how to change the oil filter", which was a real surprise. Would someone who didn't know how to change the oil, spend $25 for a PDF on "how to"? I think they'd spend that money on an oil change. Others were very complicated. Here are the first couple of pages without the illustrations of one PDF:

Body Repair News
2018 Clarity Plug-in Hybrid: New Model Body Repair Information
DISCLAIMER: This publication contains a summary of new body and vehicle technology that may affect
collision and other body repairs. Always refer to the service information manual and Body Repair
Manual for complete repair information. A subscription may be purchased at: techinfo.honda.com

TABLE OF CONTENTS

New Model Body Technology Page 2
Body Repair Information Page 5
Welding Precautions and Information Page 6
Collision Repairs (Before Starting, During and After) Page 8
Authorized Honda Clarity Dealers Page 10

OVERVIEW OF BODY FEATURES
• Body construction using 52% lightweight materials, including aluminum and ultra-high-strength steel
(UHSS - 980 MPa and higher).
• World’s first Glass Fiber Reinforced Polymer/Plastic (GFRP) rear bumper beam.
• Bolt-on resin composite front bulkhead assembly.
• Clarity Plug-in Hybrid is equipped with Honda Sensing®, which includes these advanced safety and
driver-assistive technologies: Adaptive Cruise Control with Low Speed Follow, Lane Keeping Assist
System, Road Departure Mitigation, and Collision Mitigation Braking System™ with pedestrian
sensing capability.

WARNING
• Keep heat, sparks, and flames away. In addition, keep electronic devices that can emit static discharge away.
• Always have a fire extinguisher (dry powder type or carbon dioxide gas type) at the work location at all times.
• Only properly trained technicians should inspect and repair the Clarity’s high-voltage systems.

MODEL/YEAR
MODÈLE /ANNÉE
DATE OF ISSUE
DATE EN VIGUEUR
BULLETIN NUMBER
NUMÉRO DU BULLETIN
2018 CLARITY
PLUG-IN HYBRID
January 5, 2018 J-7-17
© 2018 Honda Canada Inc. – All Rights Reserved 2 of 10

NEW MODEL BODY TECHNOLOGY
Body Construction and High-Strength Steel Content
• Steel parts are color coded based on their tensile strength in Megapascals (MPa).
• High-strength steel (HSS) is defined as any steel with a tensile strength of 340 MPa or higher.
• Ultra-high-strength steel (UHSS) is defined as any steel with a tensile strength of 980 MPa or higher.
• Steel repair and welding procedures vary, depending on the tensile strength of the parts involved.
NOTE: The following illustrations are for general reference only. Some body parts are made from multiple
layers of different tensile strength steels. Refer to the Body Construction section of the body repair manual
for specific steel tensile strengths.


This is a ten page bulletin including illustrations, such as the color coded pic described above showing the frame in different colors for the different strengths of metal. One would have to know this info if making collision repairs. All very comprehensive, including how much heat can be applied to each of the different metal to preserve their integrity.

While there might be articles that would interest a backyard mechanic like some of you here (pyleadam2012), you would really have to know what you were looking for, and have the patience to find it.

In the end, I wish I had just spent the $25 on beer or wine.
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@GomerF Almost all manufacturers have this type of service nowadays. It does take some getting used to, but I find it very useful…
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The cabin air filter is behind the glovebox. Easy to get to to swap out with the hardest part being getting all the junk back into the glovebox when you're done.
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