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2004 Toyota Sienna, a/c light flashes with system running

Summary says it all, owned vehicle since new and problem is intermittent, a/c refrigeratn is at proper level.

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The AC light will flash if the AC compressor "Revolution Sensor" is compromised.
This is the only reason that the AC light will flash. Best advice: Replace the AC revolution sensor. It is bolted onto the side of the compressor. Best to have a professional do this, as loss of the refrigerant may occur when it is removed. Hope this helps, and thanks for choosing FixYa. The graciousness of a FixYa rating would be most appreciated.

Posted on Nov 24, 2008

  • Mary Ellen
    Mary Ellen Apr 12, 2014

    How much does it cost to replace the AC revolution sensor?

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The security light on my dash keeps flashing red when I turn off my toyota sienna and lock the doors.


think its,meant too ,flash red its showing the alarms activated .if vehicle is left any length of time always disconnect the battery

Mar 12, 2015 | 2004 Toyota Sienna

Tip

Toyota AC Light flashing


Here is a real money-saving tip for you Toyota owners, with a problem of your AC light flashing on the instrument panel, when the AC is on.

You may also expericence a 'no cooling condition', also.

This info pertains to the following Toyota vehicles:

2001 thru 2004 Camry, Echo and Celica

2002 thru 2004 4Runner, Corolla, MR2 Spyder

2003 thru 2004 Highlander, Matrix, Sienna and Solara

Toyota is aware of this situation, and has produced a technical service bulletin to rectify the AC light flashing condition.

What has happened here is that the AC relay
(noted as the 'AC MG CLUTCH' relay in the relay box, under the hood)
has gotten weak over time, and is not properlying transmitting power to engage the AC compressor clutch.

Toyota has an improved relay available, and can be purchased at any Toyota parts department.

The affected relays have the following part number stamped on them:
90987-02022

The improved relay part number is 90987-02028

The repair is quite easy, all you have to do is identify that you have a 90987-02022 relay. If so, purchase a new relay, 90987-02028, and simply remove the old one, and fit the new one into the relay box.

Once the new relay is installed, the AC light flashing problem will be cured.

We hope that this tip saves you the money that you would have paid a repair facility to daignose the problem for you.

Thanks for reading my Tip!

All 4-thumb helpful ratings and testimonials (VERY HELPFUL) would be greatly appreciated.

on Jan 02, 2010 | Toyota Camry Cars & Trucks

1 Answer

2004 Toyota Sienna will not shift out of Park after replacing dead battery.


Hi,

When you start the vehicle try to step on the brake pedal then try to shift it to drive or park.

Jan 12, 2015 | 2004 Toyota Sienna

1 Answer

Battery fully charged, engine won't start or even turn over, gear locked in park, brake pedal is depressed.


This may help: http://www.toyotanation.com/forum/274-2nd-generation-2004-2010/199861-04-sienna-transmission-lock.html
There are multiple issues here.Won't crank? Go direct to starter.

Possible recall:http://www.toyoheadquarters.com/threads/2004-2005-2007-2009-toyota-sienna-shift-lock-solenoid-recall-d0r.206/

Nov 10, 2014 | 2004 Toyota Sienna

1 Answer

Toyota sienna rear dome lights flashing


I had the same problem of my dome lights randomly coming on in my 2004 Toyota Sienna. I found that it is a bad switch on the sliding door. I have written up how to replace the switch with all the steps and plenty of pictures on my blog at: http://johnfixesstuff.blogspot.com/2013/02/how-to-fix-sienna-dome-lights-randomly.html

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2 Answers

2006 Toyota Sienna XLE: Traction control is triggering for no apparent reason


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Antilock brake system.TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module

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1 Answer

My new 2010 Toyota Sienna XLE Ltd daytime running lights (DRL) do not seem to come on in any position of light switch on stalk. Light came on in older Siennas (2004) whenever van was started regardless of...


first, your vehicle is under factory warranty so I wouldn't play with anything. Second make sure that the emergency brake is completly off, third some vehicle drl systems only work when the vehicle is taken out of park. I hope this helps.

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4 Answers

2006 Sienna Airbag Light off


it is harness connection issue. Under driver seat check for any loose connection. make sure all of them connected properly by pressing connector together and it should the problem

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1 Answer

2003 Toyota 4 runner Issues


Replace your magnetic clutch relay.
TSB EL011-05 : A/C LIGHT FLASHING - MAGNETIC CLUTCH RELAY 6/3/2005 - 2001 – 2004 Toyota Camry, ECHO, & Celica. 2002 – 2004 4Runner, Corolla, & MR2 Spyder. 2003 – 2004 Matrix, Sienna, & Solara. This bulletin is to provide information regarding countermeasures to the A/C magnetic clutch relay for A/C light flashing (inoperative A/C) issues on some vehicles equipped with a magnetic clutch compressor.
Applicable Warranty*:
This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 miles, Whichever occurs first, from the vehicle’s in-service date.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint

Sep 02, 2008 | 2003 Toyota 4Runner

1 Answer

VSC and engine light on


The Trac light comes on automatically, in conjuction with the Check Engine Light. You need your vehicle scanned for DTC codes.

Aug 11, 2008 | 2008 Toyota Sienna

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