Check engine light

azsupra · 10-18-2009, 03:40 PM

New to the forum here. About your problem, I would recomend also looking at the knock sensor. It is located in the middle of the block underneath the intake manifold. My car has a few electrical problems still but i do know from experience that the knock sensor can help.

My question: Why is my check engine light on when the battery is connected? the key is not in the ignition( obviously the car is not turned on.) And the car is drawing mad power away from the battery. A brand new battery is almost dead after a few hours of being connected to the car.

Busted Knuckles · 10-19-2009, 12:32 AM

You should start a new thread, instead of hi-jacking this one.

But, it sounds like you have relays stuck on. Run through the wiring diagrams in the TSRM, looking for relays associated with the ECM.

Cyto · 10-21-2009, 05:16 AM

Lol Knuckles you're awesome..

cre · 10-21-2009, 06:01 PM

Quote:

Originally Posted by azsupra

New to the forum here. About your problem, I would recomend also looking at the knock sensor. It is located in the middle of the block underneath the intake manifold. My car has a few electrical problems still but i do know from experience that the knock sensor can help.

Specifically, look at the wiring; it's a somewhat common problem.
http://oldschool.supracentral.com/htm/knock.htm

Oh, and GTE's have two and they're to the sides of the center.

10-18-2009, 03:40 PM	#1
azsupra Stock Join Date: Oct 2009 Location: arizona Posts: 1	sensors New to the forum here. About your problem, I would recomend also looking at the knock sensor. It is located in the middle of the block underneath the intake manifold. My car has a few electrical problems still but i do know from experience that the knock sensor can help. My question: Why is my check engine light on when the battery is connected? the key is not in the ignition( obviously the car is not turned on.) And the car is drawing mad power away from the battery. A brand new battery is almost dead after a few hours of being connected to the car.

10-21-2009, 05:16 AM	#3
Cyto 3" Exhaust Join Date: Jul 2009 Location: USA Posts: 103	Lol Knuckles you're awesome.. __________________ Proud owner of a 1988 Toyota Supra Turbo, 105k Miles, and great condition. I might have to sell it to help pay for school so here's the link. http://www.toyota-supra.info/forums/...html#post72357

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Check Engine Light & Warning light on	Chomper	MKIV FAQ	19	02-11-2011 12:51 PM
check engine light	Clorox9	Non-Generation Specific Questions	1	05-08-2009 06:57 PM
Check Engine Light	Johnny boy 82	MKIII Supra	2	06-09-2006 09:41 PM
check engine light	ironcobra2002	MKIII Supra	4	11-05-2005 04:07 AM
1998 Supra Check Engine Light	SupraLady	Non-Generation Specific Questions	2	12-15-2004 11:39 PM

10-19-2009, 12:32 AM	#2
Busted Knuckles 12psi boost Join Date: Dec 2007 Location: Atlanta Posts: 300	You should start a new thread, instead of hi-jacking this one. But, it sounds like you have relays stuck on. Run through the wiring diagrams in the TSRM, looking for relays associated with the ECM.