Code 12

808Supra · 05-18-2007, 06:14 PM

Well after some more work on the car with minimal results i ran another diagnostic and snatched a code 12. Has anyone had any experience with this code? should i just replace my whole distributor? also i cant get a voltage reading from my coilpacks when in the on position, i cant find the ground wire mentioned in another post could that be the problem with the coil packs?
Thanks again guys

cre · 05-18-2007, 10:12 PM

A bad or missing ground is a definite possibility. What ground line is it that you can't locate?

j3pz · 05-18-2007, 10:46 PM

ive read from other posts that the ground wire on the coils is more of a 'drain' wire. however id check into that. it should be on the right side of the packs and connect to the head near the outside of the cam cover.

how are you checking for voltage? http://www.cygnusx1.net/Supra/Librar...ion=IG&Page=12

is that how you are doing it?

808Supra · 05-20-2007, 09:55 AM

Yes i am doing it just like that :-) i think ill just replace the Distributor and the coil packs, mite as well upgrade them while im at it too, so can anyone recomend a good higher end solution?

05-18-2007, 06:14 PM	#1
808Supra Stock Join Date: Feb 2006 Location: Hawaii Posts: 23	Code 12 Well after some more work on the car with minimal results i ran another diagnostic and snatched a code 12. Has anyone had any experience with this code? should i just replace my whole distributor? also i cant get a voltage reading from my coilpacks when in the on position, i cant find the ground wire mentioned in another post could that be the problem with the coil packs? Thanks again guys

05-18-2007, 10:46 PM	#3
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	ive read from other posts that the ground wire on the coils is more of a 'drain' wire. however id check into that. it should be on the right side of the packs and connect to the head near the outside of the cam cover. how are you checking for voltage? http://www.cygnusx1.net/Supra/Librar...ion=IG&Page=12 is that how you are doing it? __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

05-20-2007, 09:55 AM	#4
808Supra Stock Join Date: Feb 2006 Location: Hawaii Posts: 23	mhm Yes i am doing it just like that :-) i think ill just replace the Distributor and the coil packs, mite as well upgrade them while im at it too, so can anyone recomend a good higher end solution?

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05-18-2007, 10:12 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	A bad or missing ground is a definite possibility. What ground line is it that you can't locate?