ATC valve

Discussion in 'International Forum' started by QUALITYTRUCK, Mar 29, 2016.

  1. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Hey Heavy D. 2005 9400/ISX Wabco 4s/4m module vin#6c259622. Had to piece back together the abs system. 1 more active code for ATC valve open circuit. Where is it??????? Is it part of left rear modulator? I can trace circuit if I could find the valve. I feel stupid that I can't find it.
     
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  3. Heavyd

    Heavyd Road Train Member

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    It will be integrated into the rear relay valve. I checked the build list. Doesn't say it was built with traction control, only 4 channel abs. See if it has a traction disable switch in the dash. It is possible for the Meritor Wabco ABS module to "relearn" on it's own if there is a traction control valve or not. The thing is, it can learn in error that it thinks it has a traction control valve when in fact there isn't one there. Then it logs a code.
     
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