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Electrical problem, ECM or DLC problem

Discussion in 'Technical Chat' started by akp357, Feb 4, 2010.

  1. Feb 4, 2010 at 3:14 PM

    akp357 [OP] New Member

    Aug 26, 2009
    01 Tacoma 4x4
    I have a 2001 Tacoma that recently could not pass the Smog Test. Came back with a message "fail". I recently purchase an OBD II scanner and hooked it up to the DLC and got a "connection error" message. What are the possible causes. I'm hoping that it's the DLC and not the ECM. The scanner is working fine as I plugged it into my other car. Also, can I connect the scanner directly to the ECM, bypassing the DLC for isolating t/shooting purposes. Any help would be greatly appreciated.

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