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Toyota RAV4 Maintenance and Repair



  • wwestwwest Posts: 10,706
    Only if you "dial" it in.

    If your manual "setpoint" was on or near the cooling side when you switched to defrost you will get "COOL" defrost/defog/demist airflow. And in fairly short order if you didn't previously have the A/C engaged, it is now, and the airlow to the windshield will get even COOLER. But at least it will be dehumidified soon as the evaporator vane surface temperature declines to the dewpoint of the incoming (fresh) airflow and only if the blower speed it low enough for the incoming airflow to be cooled to dewpoint....

    But what if the dewpoint of the incoming airflow is so low the A/C is ineffective at dehumidification....??

    DENSO: "Gee, I guess we didn't think of that...but we do disable the A/C if the OAT is below 35F...."

    The manual doesn't tell you this, at least the last Camry manual I've seen, but when you need to defog/demist the interior surface of the windshield turn the heating and blower level all the way up and then switch to the defrost/defog/demist mode.

    If that happens to be overkill then so be it, no harm, no foul, you can now re-adjust, moderate, the effects at will.

    The RX300 series has a c-best option, two actually, wherein the "link" coupling the operation of the A/C to defrost/defog/demist mode can be severed. The second on allows you to indefinitely disable the A/C until the next time you turn it on yourself using the button.

    Prior to discovering the c-best options I simply disconnected the A/C compressor clutch wire during the winter months.

    In my 1992 LS400 I installed a switch that increased the resistance of the interior air temperature sensor. Before I activated the defrost/defog/demist mode I flipped the switch to make the climate control ECU think the cabin was cold, very COLD, and that resulted in lots of HEAT and high blower speed as I switched modes.

    Later versions, my 2001 RX300, have added another level of digital signal processing that doesn't allow sudden/quick changes in certain sensor output readings. But then the RX has a "twist" dial to set the temperature so I just give it a quick clockwise spin.
  • jimdrewjimdrew Posts: 84
    I thought that folks were just unlucky...they said their windshield had cracked for no apparant reason. I also thought they probably got hit by a stone. I am here to tell you that it is fact..the windshield will crack on it's own. It happened to me today and the car was parked under cover. At first I thought it was something spilled on the windshield because of the strange design...well, it was is a crack. The oddest design like a string was stretched across and in an arc around the windshield. I will be in Toyota tomorrow morning. I did call and was told of course a supervisor has to look at it....this is a problem folks and it is real. It will happen to you sooner or latter. Just like the fume canister...under the drivers side of the needs to be fixed by way a $24000.00 car should be sold with these defects. C'mon Toyota...this is just plain wrong.

    Jimmy Drew :mad:
  • smogdungsmogdung Posts: 349
    I traded in my RAV4 last Nov for an HHR LT2....after 10K defects.....very happy....the RAV had over $6K worth of warranty work done before I unloaded it on that poor unsuspecting the time the RAV had 10k miles it had spent many-many days in the shop. Bought son and daughter a new 95 & new 2000 cavelier & sunfires.....after all these years only one trip back to dealerships for ...a switch....they still drive those cars...the cheapest cars GM ever buildt make the RAV I owned seem like a bad nightmare....cannot begin to list all the things that went wrong with it....good luck guys!!
  • maxwell3maxwell3 Posts: 10
    does the RAV4 have some sort of warning (sound?) that tells you that you've left your lights on after you turn the engine off?
  • fhspsu67fhspsu67 Posts: 24
    No, the lights automatically shut off after 30 secs unless the keys are in the ignition.
  • maxwell3maxwell3 Posts: 10
    I should have clarified...the headlights?
  • fhspsu67fhspsu67 Posts: 24
    Yes, I'm talking headlights, too. After the doors are closed there is a 30 second delay and then the headlights turn off. You can turn them off ssoner by locking the doors with the remote.
  • jimdrewjimdrew Posts: 84
    well partly because I was expecting it to happen because of other postings and partly because this is really quirky my windshield is not cracked. My hairline cracks turned out to be something on the windshield..yes I tried to clean it and when I got to the dealer today they tried...and the service advisor said wait a minute something isn't right and he came out with a razor blade..shure enough he scraped my "crack" right off. :confuse: Boy did I feel stupid. Anyway, I take back my post...all is well and I love my Sport V6 Rav4. Oh, I also asked about the fume canister if anyone has had a problem or is there a advisor said not a one returned and no recall.

    Jimmy Drew
  • steverstever YooperlandPosts: 40,004
    The throttle lag collection of posts has been moved to the new RAV4 Throttle Lag discussion (yeah, original, I know :shades:).

    Here's the link (Lir posted an update a short while ago):

    RAV4 Throttle Lag

    Need help navigating? - or send a private message by clicking on my name.

  • kiddo1kiddo1 Posts: 1
    For some reason my alarm went off and in my panic to quiet it I somehow disabled the automatic locking device forcing me to use the key.

    Is there an easy solution to this problem? My dealer is not very helpful and wants to charge me for "diagnoising" the problem. Am I expecting too much from them, or is the problem that complicated?
  • ofeliaofelia Posts: 10
    Depending on what type of alarm you have, there should be instructions on how to reset it. If the alarm is installed by the dealer, they should be able to reset it for free. Go directly to service manager or customer service manager for better results.

    My alarm would go on after disarming, and I would turn it of by putting my key on "on" position (for accessories) then hit the reset button for alarm at the bottom. The second time around, this did not work, I called the dealership and he told me to hold the button while putting the key to ignition on. I took it to the dealership coz I can't take it anymore, they changed the alarm brain. Seems like toyota has problems with the alarm coz my co-worker had the same problem.
  • ihammerihammer Posts: 75
    It was around June 15th that I began the complaint process regarding the droning noise my 2006 RAV 4 makes by taking it to the dealer to have them listen to it. They gave me an appointment for June 26th and that day they looked at it, but didn't solve the problem. I have talked with Toyota corporate and the dealer many times since then and they finally decided that it is the fuel pump. So this Tuesday 8/22/06 they are going to replace it (fuel pump) with a new one from Japan. I'm keeping my fingers crossed that this will solve the noise problem once and for all! I will let you know whether this works or not in case there are more of you out there with this problem. By the way the NHTSA site has several Service Bulletins listed for the 2006 RAV4s for various issues and I am going to ask the dealer about these when the car goes in for the fuel pump.
  • johan1johan1 Posts: 21
    I have been following your message all these days. How were things turned out?
  • ihammerihammer Posts: 75
    Thanks for asking. Unfortunately Toyota's first attempt at a fix did not work. They replaced the fuel pump yesterday and when I got the car back over 8 hours later they said they were sorry, but that the noise was still there. It was even louder than before. They told me that Toyota was probably going to have them replace the fuel tank next to see if that worked, but that they would call me back today to let me know. When the service writer called me today he said that Toyota had instead decided that the next thing they would try would be to replace the fuel tube assembly, which includes the fuel pump housing, a/some screens, a switching valve and a pump regulator. They ordered the part, but it may take some time to get it since it is on back order. So I am stuck with the droning noise and I have no idea how long I will have to wait for the next "fix". Very discouraging! I will keep posting updates as the process moves along.
  • johan1johan1 Posts: 21
    Thank you for the quick response. Hope the replacement of the whole tube assembly cures the noise.

    I somehow feel it is temperature related. It happens always when the car is hot. :confuse:
  • ofeliaofelia Posts: 10
    I hope that fixes everything, when I posted a few months ago, I mentioned they replaced the fuel tank and pump. Unfortunately, a few weeks ago, I hear some sounds again. It dissapears and doesn't stay that long and comes from the back of the vehicle. I think I'm getting tired of the problem that I mask the sound with my radio...hope it works for you since they are replacing the whole fuel tube assembly.
  • ihammerihammer Posts: 75
    Thanks for your response. I will keep you posted, but it may be awhile before I have anymore news since the dealer said the part is back ordered. Sorry to hear you still have the droning sound. I'm glad they didn't bother to replace my whole gas tank since that didn't seem to work for your vehicle.
  • ihammerihammer Posts: 75
    You're welcome. You know, I think you have a point about it always happening when the car is hot. I have been keeping a diary complete with dates and times and a pattern has developed which does indeed indicate that it is heat related. For example, when I first turn the car on in the morning to drive to work the droning noise never comes on, but after I have been driving for awhile it comes on (when the car is hot). If I make a stop at the store or wherever after having driven for awhile (again, the car is hot) and then get back in the car to head home the droning noise comes on as soon as I start the car. Anyhow I will keep you posted as to the result of replacing the tube assembly though that may not happen for awhile since the part is back ordered.
  • xtek3xtek3 Posts: 4
    Sorry to hear about your ongoing dilemma. I too face a similar situation. The droning sound occurs around 55-60 mph and lasts approx. 2-5 sec's with a frequency about every 30 sec. Brought it to the dealer's (wife did that is) and thy took it out for 5 min's and could not duplicate sound-this happens to me each time I drive it!! So I feel this is going to be a pain in the arsk to troubleshoot and resolve. Pls keep the post going.
  • ihammerihammer Posts: 75
    I'm really sorry to hear that yet another of us 2006 RAV4 owners is experiencing the droning noise problem. It's interesting that you mention that it happens in your vehicle at around 55-60 mph. Johan, in another earlier post said he thinks it's a temperature related issue. Mine usually happens after I've been driving for awhile at freeway speeds (so of course the car is hot by that point) and it also does it while the car is stopped, but still running, ie at a stop light or in a parking lot and always after it's been driven for awhile. The droning sound also happens to me each time I drive the car. Mine is a 6cyl and I'm not sure whether others with the problem have 4 or 6 cyls. It is a blast to drive - great acceleration and handles very well, but I can't live with this noise if Toyota isn't able to fix it. I was discouraged to hear that another forum participant, Ofelia, had her entire fuel tank and fuel pump replaced and that that did not resolve the issue. Maybe the next fix they try on my car will take care of it - I'm keeping my fingers crossed, but have little faith at this point. I will definitely keep the post going because maybe if they solve it with my car they can fix all of the others without putting you all through so many hoops.
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