Question about 1993 Toyota Camry V6

3 Answers

Hot weather auto transmission shifting problem

Hi: My '93 Camry with 98,000 miles suddenly started shifting erratically during these hot summer days with temps in the 90's. It still runs but does not shift properly. In the evenings after sunset, it runs fine and even during the day if I turn off the car and wait 10 mins sometimes it will be OK. The second and possibly related problem is that in the heat of the day, the front brakes sometimes lock up erratically and are fine in the evening. Any help would be greatly appreciated - Many Thanks.

Posted by wizecards on

  • 1 more comment 
  • wizecards Aug 17, 2008

    Thanks for the feedback. A couple of questions come to mind. Is the throttle position sensor fairly accessible and relatively easy for a mechanic to test/replace or is labor intensive and costly?



    Also is it possibe for car owners to obtain a code reader and run their own tests or does it require complex expensive equipment? Is the car computer fairly accessible?



    Finally, several people have suggested that my transmission problem might be related to the transmiision fluid and/or filter that could need replacing - any thoughts?



    Many thanks

  • wizecards Aug 19, 2008

    Another problem that I have with my '93 4 door Camry V6 is that the automatic door locks for the front doors no longer work, although the rear doors are locking fine when I push the master door lock button. The front locks move slightly but don't seem to have enough power to actually lock? Any suggestions appreciated.

  • wizecards Aug 19, 2008

    The last comment from India makes no sense at all and does not address my question. The car never stops and doing routine maintenance as suggested will obviously not fix the door locks!

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3 Answers

Anonymous

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Taking it to a mechanic is your best option

good luck

Posted on Aug 19, 2008

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Anonymous

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Servicing is needed to your car as everything works properly.but stops only sometimes.do oiling, servicing,and powerful hard cleaning to it.it will be ok.

Posted on Aug 19, 2008

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Ginko

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Often this kind of problem it is caused from faulty throttle position sensor, you find out by connecting a code reader to your car computer.
throttle position sensor tells to your transmission control module how you are using the throttle, so that the car automatic transmission can shift to right gear, when this is faulty often you have transmission faults related to engine rpms and temperature, this can explain a trans problem happening only when engine is hot.
In some case it is not the sensor, but the computer module controlling transmission that is faulty.
To find out cause for the problem you need to connect a code reader to transmission module and to main computer module (ECU).
The code reader will return fault codes that allow to locate the problem. this kind of job can be done at any qualified garage.

Posted on Aug 16, 2008

  • 3 more comments 
  • Ginko
    Ginko Aug 16, 2008

    The brake problem is something that I have never seen before, the only part on brakes that can take decisions on his own it is the ABS module, but I cannot understand how ABS can lock up brakes in this way.
    You should be able to understand all computer related problems by scanning car computer with a code reader, this operation can be performed at any good garage.

    Regards


  • Ginko
    Ginko Aug 17, 2008

    The TPS is usually placed behind throttle pedal, or inside the engine, depending on the model. A basic code reader (scanner only , no check on fiel volume/pressure and engine performance) can be purchased at a good car part shop for about $250.
    If you want to DIY, ar at least to do the diagnostic, depending on what the fault is, you will need a service manual for your vehicle, Try the Haynes manual,.

  • Ginko
    Ginko Aug 17, 2008

    Transmission fluid check is also a basic maintenance that should be performed whenever you have problems with trans, even if from description it does not look as a problem with transmission fluid. Follow instructions on site below:

    How To Check Automatic Transmission Fluid



  • Ginko
    Ginko Aug 20, 2008

    When the automatic door locks for the front doors does not work it means that wiring for dor looks are broken, either for a bad connector or because of some cable severed by usage. Bad door lock cablature sometimes can give you troubles with the anti theft system.

  • Ginko
    Ginko Aug 20, 2008

    First ensure that door lock fuse is fine , and that it is not just a fuse problem.
    To fix door lock wiring problems usually you need to remove door panels and follow and test wiring from fuse box to door lock, and from fuse box (on the other way) to control module.
    If wirings are OK, then it is the control module.


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