OBD II Location?????

karrar55 · 07-22-2009, 12:04 AM

Where can I find the OBD II on my 93 honda accord? Thanks GUYS!!!

hondamark35 · 07-22-2009, 03:16 AM

right near the sassoflange...

no, for real you haven't got an OBD II. also it's not really called and OBD II so much as that is just the type of ECU one might have.

93 accord=OBD I ECU.
96 and later=OBD II ECU.

brace for flaming...

karrar55 · 07-22-2009, 12:41 PM

ok where can I find the OBD I ECU? THANKS!!

hondamark35 · 07-22-2009, 01:05 PM

it's under the front passenger carpet. pull back from the firewall, you'll see a stamped-steel plate held down with several 10mm nuts. the ECU (and transmission computer if automatic) is bolted to the backside of this plate. once the plate is unbolted from the floor, you can flip it to access the ECU. you may need to unplug a few of the wire connectors to allow it to flip.

karrar55 · 07-22-2009, 01:55 PM

wow ok!!! all that just to get the plug???? will that remove the engine light from the dash? THANKS!!!!

TheMuffinMan · 07-22-2009, 02:04 PM

Wtf are you trying to do?

Are you trying to get access to the ECU - which is the computer itself, or are you trying to check the codes?

hondamark35 · 07-22-2009, 04:29 PM

Quote:

Originally Posted by TheMuffinMan

Wtf are you trying to do?

Are you trying to get access to the ECU - which is the computer itself, or are you trying to check the codes?

dang, i didn't even think of that!! i just assumed ECU removal or replacement... this would not be the way to check and clear codes.

karrar55 · 07-22-2009, 06:22 PM

ok can someone tell me how to clear codes???? THANKS!!!

TheMuffinMan · 07-22-2009, 06:22 PM

Just pull the ECU fuse.

karrar55 · 07-22-2009, 06:25 PM

isnt that in the fuse box and woudnt u need the ecu to be connected? sounds important!

TheMuffinMan · 07-22-2009, 06:34 PM

Well yes, it's what gives the ECU power, remove the fuse, remove the power, clears the codes. You insert the fuse back in after a few minutes.

karrar55 · 07-22-2009, 07:15 PM

ya i removed the ecu fuse and the power and put them back in after a few min and nothing changed, the light still comes on! any other ticks would be great THANKS!

Targa250R · 07-22-2009, 07:18 PM

Quote:

Originally Posted by karrar55

ya i removed the ecu fuse and the power and put them back in after a few min and nothing changed, the light still comes on! any other ticks would be great THANKS!

To turn the Check Engine light off in an OBD-1 car, you have to actually fix the problem that is causing the light to come on, which is indicated by the error codes stored in the computer when the light trips . . .

And to reset the ECU and clear codes, you have to pull the hazard/backup fuse, which will also reset your clock and radio code if equipped with an anti-theft radio.

karrar55 · 07-22-2009, 07:49 PM

well i had to fix the o2 sensor and i think my brother ****ed with it wich cauesd the light to turn on but u telln me to unplug the hazardbackup fuse and it will reset????

TheMuffinMan · 07-23-2009, 02:46 AM

Is the CEL throwing the same code as before? I completely forgot about what Targa mentioned. If you don't fix the code, it won't clear it'll just be right there.

And what brand O2 did you get, some brands work better than others.

Targa250R · 07-23-2009, 05:24 AM

Quote:

Originally Posted by karrar55

well i had to fix the o2 sensor and i think my brother ****ed with it wich cauesd the light to turn on but u telln me to unplug the hazardbackup fuse and it will reset????

The fuse in the engine bay fuse box labeled "BACK UP" - pull it for 10 seconds. It's a 7.5 amp fuse. This clears the codes temporarily and resets the ECU.

karrar55 · 07-23-2009, 10:11 AM

idk what o2 sensor it is! my brother didnt change it! he had to cut off the flex pipe cause it was leaking and i think he cut off the o2 sensor with it!

dpetro1 · 07-23-2009, 11:01 AM

Jesus Christ, this thread makes my head want to explode!

How to check codes
http://www.honda-tech.com/showthread.php?t=1901557

Find out what code you are getting and then fix it. Dont just "turn the light off", its there for a reason

karrar55 · 07-23-2009, 11:48 AM

uh no thank u ill try 2 clear the code! sense its not a major problem! if i new it was a major problem i would fix it!

Targa250R · 07-23-2009, 12:10 PM

It's a pretty "major" problem for a closed loop electronic fuel injection system to be completely missing a primary oxygen sensor. It's just going to run in open loop constantly.

If the sensor is MIA, then no amount of pulling fuses will clear the code. It's going to come back immediately as soon as you turn the car on.

karrar55 · 07-23-2009, 01:55 PM

idk anymore! how do u go about fixn o2 sensors????

gsrauto98 · 07-23-2009, 02:15 PM

I think YOU need to take it somewhere and get it fixed, since it sounds like you have no idea what is going on

karrar55 · 07-23-2009, 03:27 PM

obviously. thats why i posted this up!

TheMuffinMan · 07-23-2009, 03:54 PM

You wire the O2 sensor back in it's place...then no more CEL

GhostAccord · 07-23-2009, 03:59 PM

If you want to troubleshoot the O2 electrical connections. Then I would suggest you get yourself a manual. If you don't have the electrical know how or tools to trouble shoot. Then you could just replace the primary O2 sensor. All you need is a big wrench and a new O2 sensor.

I don't have the manual for the 4th gen Accord all in one PDF yet. Otherwise I would send it too you. Try searching for 91-93 Accord manuals on Google. you may get lucky and find one that you can download free of charge.

I know that they are out there but we aren't allowed to post links to them on this forum. good luck

07-22-2009, 12:04 AM	#1
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	OBD II Location????? Where can I find the OBD II on my 93 honda accord? Thanks GUYS!!!

07-22-2009, 03:16 AM	#2
hondamark35 Honda-Tech Member 2000 Honda Civic Join Date: Feb 2005 Location: W. Cola, SC 29170 Posts: 3,000 iTrader Rating: (0)	Re: OBD II Location????? right near the sassoflange... no, for real you haven't got an OBD II. also it's not really called and OBD II so much as that is just the type of ECU one might have. 93 accord=OBD I ECU. 96 and later=OBD II ECU. brace for flaming... __________________ Currently on forum hiatus. build updates can be found here-> Build/Project Blog I can still be reached by PM.

07-22-2009, 12:41 PM	#3
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? ok where can I find the OBD I ECU? THANKS!!

07-22-2009, 01:05 PM	#4
hondamark35 Honda-Tech Member 2000 Honda Civic Join Date: Feb 2005 Location: W. Cola, SC 29170 Posts: 3,000 iTrader Rating: (0)	Re: OBD II Location????? it's under the front passenger carpet. pull back from the firewall, you'll see a stamped-steel plate held down with several 10mm nuts. the ECU (and transmission computer if automatic) is bolted to the backside of this plate. once the plate is unbolted from the floor, you can flip it to access the ECU. you may need to unplug a few of the wire connectors to allow it to flip. __________________ Currently on forum hiatus. build updates can be found here-> Build/Project Blog I can still be reached by PM.

07-22-2009, 01:55 PM	#5
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? wow ok!!! all that just to get the plug???? will that remove the engine light from the dash? THANKS!!!!

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07-22-2009, 06:22 PM	#8
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? ok can someone tell me how to clear codes???? THANKS!!!

07-22-2009, 06:25 PM	#10
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? isnt that in the fuse box and woudnt u need the ecu to be connected? sounds important!

07-22-2009, 07:15 PM	#12
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? ya i removed the ecu fuse and the power and put them back in after a few min and nothing changed, the light still comes on! any other ticks would be great THANKS!

07-22-2009, 07:49 PM	#14
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? well i had to fix the o2 sensor and i think my brother ****ed with it wich cauesd the light to turn on but u telln me to unplug the hazardbackup fuse and it will reset????

07-23-2009, 10:11 AM	#17
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? idk what o2 sensor it is! my brother didnt change it! he had to cut off the flex pipe cause it was leaking and i think he cut off the o2 sensor with it!

07-23-2009, 11:01 AM	#18
dpetro1 Honda-Tech Member Garage is empty, add now Join Date: May 2004 Location: Tracys Landing, MD Posts: 4,195 iTrader Rating: (0)	Re: OBD II Location????? Jesus Christ, this thread makes my head want to explode! How to check codes http://www.honda-tech.com/showthread.php?t=1901557 Find out what code you are getting and then fix it. Dont just "turn the light off", its there for a reason

07-23-2009, 11:48 AM	#19
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? uh no thank u ill try 2 clear the code! sense its not a major problem! if i new it was a major problem i would fix it!

07-23-2009, 12:10 PM	#20
Targa250R be professional Garage is empty, add now Join Date: Oct 2002 Location: Pittsburgh, PA Posts: 14,842 iTrader Rating: (0)	Re: OBD II Location????? It's a pretty "major" problem for a closed loop electronic fuel injection system to be completely missing a primary oxygen sensor. It's just going to run in open loop constantly. If the sensor is MIA, then no amount of pulling fuses will clear the code. It's going to come back immediately as soon as you turn the car on. __________________ 1996 Accord \| 1998 CB750 \| 2001 Integra \| 2012 Giant Anthem X29 Last edited by Targa250R; 07-23-2009 at 12:16 PM.

07-23-2009, 01:55 PM	#21
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? idk anymore! how do u go about fixn o2 sensors????

07-23-2009, 02:15 PM	#22
gsrauto98 Honda-Tech Member Garage is empty, add now Join Date: Oct 2008 Location: florissant, mo, usa Posts: 617 iTrader Rating: (0)	Re: OBD II Location????? I think YOU need to take it somewhere and get it fixed, since it sounds like you have no idea what is going on

07-23-2009, 03:27 PM	#23
karrar55 Honda-Tech Member Garage is empty, add now Join Date: Jul 2009 Posts: 83 iTrader Rating: (0)	Re: OBD II Location????? obviously. thats why i posted this up!

07-23-2009, 03:59 PM	#25
GhostAccord Honda-Tech Member 1996 Honda Accord Join Date: Mar 2007 Location: East Coast 506, Canada Posts: 8,751 iTrader Rating: (0)	Re: OBD II Location????? If you want to troubleshoot the O2 electrical connections. Then I would suggest you get yourself a manual. If you don't have the electrical know how or tools to trouble shoot. Then you could just replace the primary O2 sensor. All you need is a big wrench and a new O2 sensor. I don't have the manual for the 4th gen Accord all in one PDF yet. Otherwise I would send it too you. Try searching for 91-93 Accord manuals on Google. you may get lucky and find one that you can download free of charge. I know that they are out there but we aren't allowed to post links to them on this forum. good luck __________________ CD5 2.4L F22 ITB Blog H-T Members Ride/Build Thread Cheers

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OBD II Location?????