Toyota Sienna Air Conditioning Relay

Posted in the Toyota Sienna Forum

Elizabeth

Buffalo, NY

#1 Jun 6, 2011
I have been having a problem with my air conditioning (it is not working and the A/C light flashes.) I have googled and over and over have found that there seems to be a fairly common problem that is remedied by replacing the magnetic clutch relay (90987-02028.) I purchased the part and I am unable to find this relay in my vehicle. I have checked both fuse/relay boxes under the hood and the fuse/relay box located under the steering wheel...I pulled the whole panel under the steering wheel off. Nothing is labeled A/C with the exception of one 5A fuse and none of the relays has this part number nor the part number that Toyota upgraded with this number (90987-02022.) Can anyone tell me very specifically where to locate this relay? Thank you so much!
carlos santos

Toronto, Canada

#2 Jun 16, 2011
Elizabeth wrote:
I have been having a problem with my air conditioning (it is not working and the A/C light flashes.) I have googled and over and over have found that there seems to be a fairly common problem that is remedied by replacing the magnetic clutch relay (90987-02028.) I purchased the part and I am unable to find this relay in my vehicle. I have checked both fuse/relay boxes under the hood and the fuse/relay box located under the steering wheel...I pulled the whole panel under the steering wheel off. Nothing is labeled A/C with the exception of one 5A fuse and none of the relays has this part number nor the part number that Toyota upgraded with this number (90987-02022.) Can anyone tell me very specifically where to locate this relay? Thank you so much!
look for the relay that says MG CLT on your hood fuse box lid. when you pull it out it should be the 90987-02022 code. i found it on my 2004 Sienna
Wynona

Dover, PA

#3 Jun 28, 2011
Be careful. The relay might have failed for a reason.

My 2004 Sienna AC failed and the garage replaced the relay. Fixed the problem but it only lasted a couple of weeks........failed again.

When I checked the clutch relay, it was defective. When I checked the current to the relay, I discovered that the power was being fed to the relay all of the time. When the AC was off, the relay continued to be actuated. The only way to stop the current to the relay was to turn the ignition off.

Now I fear that there is a defect in one of the sensors or actuators that feed the AC control assembly. Or perhaps there is a problem with the Engine Control Module. My plan is to take the vehicle somewhere that has a scanner which can find AC problem codes.

Wynona
Lee

Santa Barbara, CA

#4 Apr 20, 2012
Elizabeth wrote:
I have been having a problem with my air conditioning (it is not working and the A/C light flashes.) I have googled and over and over have found that there seems to be a fairly common problem that is remedied by replacing the magnetic clutch relay (90987-02028.) I purchased the part and I am unable to find this relay in my vehicle. I have checked both fuse/relay boxes under the hood and the fuse/relay box located under the steering wheel...I pulled the whole panel under the steering wheel off. Nothing is labeled A/C with the exception of one 5A fuse and none of the relays has this part number nor the part number that Toyota upgraded with this number (90987-02022.) Can anyone tell me very specifically where to locate this relay? Thank you so much!
It might be that the relay has a different PN than you think. Did you find any relays in either of the boxes next to the battery that started with 90987? If so, that might be the relay you are looking for, but not finding
Lee

Santa Barbara, CA

#5 Apr 20, 2012
The A/C in my 1999 Sienna has stopped working. I suspect the magnetic clutch relay, but don't see any relays labelled as such in the relay/fuse boxes near the battery. I have seen replies indicating 90987-02022 and 02028 are the Part Numbers to be concerned about, but the only number even close in my 1999 Sienna is 90987-02006. If that is the correct number for the 1999 Sienna, I have two of them, one in each of the two fuse/relay boxes next to the battery. So which of the two boxes has the magnetic clutch relay? I can swap the two around and see if it affects the A/C, but first I would like to know what they both control.
Pubrica

Santa Monica, CA

#6 Apr 21, 2012
Are you still having the light flashing for A/C? If so, you have to go see the A/C shop because, Flashing light means that A/C system don't have enough R134a gas I believe. If system has lower pressure ( less 134a gas in system), A/C clutch won't engage even you replace the relay. good luck.
WTF

Round Rock, TX

#7 Jun 29, 2012
OK, nobody told the poster "very specifically where to locate this relay?" ....I really wish that someone on the entire WWW knew the answer, even my Toyota dealership didn't know and could not find out with 4 phone calls.. IT IS NOT IN ANY FUSE BOX ANYWHERE!!
Lee

Santa Barbara, CA

#8 Jun 29, 2012
Pubrica wrote:
Are you still having the light flashing for A/C? If so, you have to go see the A/C shop because, Flashing light means that A/C system don't have enough R134a gas I believe. If system has lower pressure ( less 134a gas in system), A/C clutch won't engage even you replace the relay. good luck.
You were right! I serviced the refrigerant and all is well. Don't know where the leak is, but will worry about that when the problem recurs. With any luck, it might be awhile.
tim

Cranberry Twp, PA

#9 Apr 19, 2013
under hoodfuse box... relay MG-CLT...compressor clutch relay
Sherman

Vancouver, WA

#10 Jun 29, 2013
1998 Sienna The A/C Relay is not in the relay fuse box under the hood. Toyota techs couldn't tell me and their service manual didn't show where it was.
Sherman

Vancouver, WA

#11 Jun 29, 2013
WTF wrote:
OK, nobody told the poster "very specifically where to locate this relay?" ....I really wish that someone on the entire WWW knew the answer, even my Toyota dealership didn't know and could not find out with 4 phone calls.. IT IS NOT IN ANY FUSE BOX ANYWHERE!!
Did you ever find it? I can't find mine.
Elizabeth

Buffalo, NY

#12 Jun 29, 2013
Sherman wrote:
<quoted text>
Did you ever find it? I can't find mine.
I have never found it and the dealership told me that was not the problem and, in fact, said the "problem" is a $1300+ fix.:( Needless to say, I will be living without air conditioning.
Crack Smoker Detector

Roseville, CA

#13 Jul 2, 2013
Your dealership mechanics have been hitting the pipe a bit too much They need the $1300 less the actual cost to fix of $75 so they can buy more crack with the $1225 thats left over.

Its in the box next to the battery!!!!!!!! KEEP LOOKING GRASSHOPPER AND YOU WILL FIND IT
barton

Winnipeg, Canada

#14 Jul 6, 2013
1998 sienna ac relay is not in the cabin, when you seat on the driver's seat, it's just before your left knee. there are some fuse and relay behind the coin box, but the ac fuse and relay are on the left side, you have to remove the cover.
josh

Portland, OR

#15 Jul 11, 2013
I can't say for sure, but I think barton's on the right path for models that have manual AC. The relay often mentioned in forums is not in one of the boxes next to the battery. There are several relays and fuses in a board behind the coin box, and one fuse is clearly labeled AC, but I can't actually find that fuse. The relays are only accessible from the top of the board, so seems like the dash needs some disassembly to really access.
DAS

Victoria, Canada

#16 Aug 12, 2013
WTF wrote:
OK, nobody told the poster "very specifically where to locate this relay?" ....I really wish that someone on the entire WWW knew the answer, even my Toyota dealership didn't know and could not find out with 4 phone calls.. IT IS NOT IN ANY FUSE BOX ANYWHERE!!
The relay is in the fuse box under the hood. It is on the RHS partly under the fender - big black box. Pry the box open by pushing the lower sides with your fingers and pulling up.
Rhe AC relay is near the front and labelled MG CLT - which I think is Toyota talk for Magnetic Clutch. I'm having trouble with mine as well - at least I hope it is just this relay. My light comes on but no AC. Also, the rear fan comes on intermittently, but I think that is another relay - likely a fan one.
Luis

La Paz, Mexico

#17 May 6, 2014
Sherman wrote:
1998 Sienna The A/C Relay is not in the relay fuse box under the hood. Toyota techs couldn't tell me and their service manual didn't show where it was.
This is definitive at least for sienna 98, I searched the web and some people has confirmed that there is no magnetic clutch relay in hood fuse box nor steering wheel fuse box. Would it be located somewhere else?
Cas

Mays Landing, NJ

#18 May 26, 2014
Were is the lower pressure to add freone high is on passenger side very visible

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