Hi Arthur

Nope, no Abs light on.

Thank for the code reader design.

First, how should I perform the duty cyle, normal polarity (pin2 black wire, Pin3 red wire) or inverse polarity (Pin2= red wire pin3= black wire) ???

Please take a look at two duty cycle test I do. Which one make sense with the code 18 ???

Do I perform the test right with the code reader ?? If I do not put the ignition on I can't read nothing, the 1pulse= no fault doesn't show.

What else could cause a code18 ???

Thanks for the link to the code page. I find it yesterday night and do the test today.

By the way the page 28 say the pin14 is for the MAS controller(201-029, 1990-92) when I try the code reader on pin14 (orange), pin1 black and red to battery(+). I can't read code the light stay on all the time, should I turn the ignition Off ???

I might try this later on tonight.

Max