enable you to run a diag test on the ecu and provide error codes... for more information a consult cable will enable you to use a number of software packages.. [ http://www.ebay.com/sch/i.html?_trksid=p2050601.m570.l1313.TR0.TRC0.Xconsult+cable&_nkw=consult+cable&_sacat=0&_from=R40 ]some for free and others varying in price.. here are some free ones.. Conzult (also full version available) ECU Talk (and also pay version) dr300zx (free) these will offer more than just codes but you will need to know what the expected values are to use them. searching the web will find software and correct readings.
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