Question about 2000 Toyota Land Cruiser

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Landcruiser 79 air con not working

Hi ive got a problem with my air con. i took it to a a/c specialist and they played around with the a/c amplifer (in behind the glove box) and it work when he bridged something out. i was told that i need a new amplifer, so i bought a second hand one from a wrecker. i plugged in the new box and it didnt work. so i got one out of a veichle that i new was working and it still doesnt work. has anyone heard of this problem before and how i might be able to fix it. i think there may be something wrong in the circit that is blowing up the amplifers for some reason.

Any advice/suupport would be great!!!

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  • josharnot Jan 10, 2009

    sorry im a mechanic by trade but dont really dable in many electrical issues.

    Toyota call it a amplifer, i would call it a "control module". it is located in behind the glove box. it has a 10 wire plug on it, and when you pull it apart it looks like a mother board out of a computer.

    The fan blower fan works fine on all speeds. im not sure what a restriction valve is. and when you jump 12 volts on to the compressor clutch it engages and the a/c runs well.

    Hope that clears it up a bit!

  • josharnot Jan 11, 2009

    thanks thats the way i was starting to fix the problem. the a/c technician was bridging something inside that box to earth and it would engage that clucth, which i guess is a plus.

    i would like to keep the thermostat and the high/low pressure switches in the circuit, but think i need a wiring diagram. would you have access to this info. its for a 2000 model 79 series landcruiser tray back ute, 1HZ N/A engine.

  • Anonymous Jan 26, 2009

    air con not working changed switches ,re gas still not working

    if brige compresser it works what next


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What is an A/C amplifier ,do you mean the restriction valve or the blower motor is it clima ??please be more specific and use the queens english

Posted on Jan 10, 2009

  • Colin Stickland
    Colin Stickland Jan 11, 2009

    right now i understand,sorry about being rude but queens english is what i need to understand such terms as fire wire/hood/trunk and whatever else i get thrown at on here.right its the climatic control computer thats playing up and this is only accessable with the right software and a degree in advanced electronics.This computer has pick up sensors everywhere,behind the fromt bumper,in the windscreen area ,rear seating area .Trust me some of these are a work of art of electronic wizardry,now short of paying for a dealer to put a new one in and reset it which is no doubt big bucks(wow iam learning american)then as your a bit of a mechanic then just by pass the thing and make it all manual like the old days,just remember to wire the pump through the pressure valve on the air con and not direct to the pump in case you lose gas and seize the pump up.To be truefull iam at a loss with all this fancy electrics nowdays as well,Europeon built cars are using encrypted software as well as ,so to speak.Result all work has to go back to dealer,some of the new cars from 2007 with encrypted software i cannot evan change the brake pads,and some now i cant evan change the oil as their is a sensor that trips in the factory immobiliser,disconnect battery and same thing happens,cut the wires to the sensor and it doesnt read it which again cuts in the immobiliser.Tried more than one local cafe/bar next to some of the dealers so i could chat up some of the mechanics and pick their brains ,Well either they are thick or they honestly dont know anything about this,as they all say they dont dont get access to the computer only the foreman or govenors son has the fingerprint authorisation to connect to the main frame computer to do diagnostics and they are not shown anything only told what to change.So all these fancy scanmasters and snap on scanners and mac things are a thing of the past from last year.So whats the point of paying all this money out when cars from 2007 cant be touched.Good job i retire soon


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