Posted by Kevin Apps on December 30, 2009, 9:55 pm, in reply to "Re: Nissan Terrano"
Hi Tony. If i read the wiring diag correct U01 is live (+) from ignition on and at start. Self diag via heated screen switch only works igntion off, now if the ignition switch is IFFY it may account for both the problem and reason for no self-diag. ONLY a GUESS Kev.