Question about 2007 Toyota FJ Cruiser

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Unsetable idle after change the battry

Hi sir i have problem to my car after change the battry my car is not good have unsetable idle also in driving.i dont know have reset procedure or have some problem now two days ago but problem is still in the car please tell me can i fix this problem myself.

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  • ss_shani007 Dec 05, 2008

    i will try thank you sir

  • Toyota Ed May 11, 2010

    Did my advice cure your problem? Please let me know. Thnaks.

  • Toyota Ed May 11, 2010

    Please remember that you have to "duplicate" all of the types of driving as mentioned above, in order for the engine computer to "relearn" the base idle parameter. Let me know how it turns out.

  • Toyota Ed May 11, 2010

    When you change the battery, the "base idle" programming is lost. What you need to do is drive the car. Drive it on the highway, accelerate and decellerate/ Then, perform about 10-15 minutes of "stop & go" driving, like city traffic. The ECU will then gradually relearn th ebase idle and your problem will diasppear. I do this 4-5 times a week as I change batteries, winter here. Common.

    Let me know how it turns out.



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I would recommend cleaning out your throttle body. When the battery was removed the computer lost its learned values, and now its not compensating for the carbon build up in the throttle body, that is now restricing airflow. you can drive it and it will relearn it, but its just learning how to work around a problem. I would say its better to fix the problem. My customers dont want to drive their cars until they stop running like junk so they can learn new throttle position values.

Posted on Feb 18, 2009


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