Standalone Engine Management System and ECU Wire/Pin Diagram

legend4life · 07-31-05, 04:08 PM

LEGEND ECU CONNECTOR SHOT

LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR A

LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR B

LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR C

LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR D

LEGEND ECU BRIEF PIN TO SENSOR DIAGRAM 1

LEGEND ECU BRIEF PIN TO SENSOR DIAGRAM 2

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 1

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 2

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 3

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 4

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 5

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 6

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 7

LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 8

This info was invaluable to me in my project, and I am sure it will be to all of you in your projects as well. I have more info that I am organizing and compiling and I will update this or make a new thread soon. These diagrams were acquired from the electrical manual at the Acura dealership, shots taken by the man, Kenso. Enjoy guys!!

Mod, I would request for a sticky on this info please.

Thanks,
Imran

skate4ever999 · 08-01-05, 04:01 AM

wow thanks a lot!!!!

carlos_cet · 08-01-05, 08:42 AM

Does anyone know if it's possible to use these pinouts and connect them to a pc or laptop to get data?

legend4life · 08-01-05, 02:15 PM

Quote:

Originally Posted by carlos_cet

Does anyone know if it's possible to use these pinouts and connect them to a pc or laptop to get data?

Sure...................

Engine was not running at that moment, but you get the idea.

sr79labrat · 08-02-05, 07:07 PM

Awesome!!!
Ben and Imran-thanks a bunch for all of the help!
Lata, Kyle
Should help with the AVCR.

carlos_cet · 08-03-05, 08:55 AM

Let me ask a stupid question. Can you hookup pinouts right to a pc and get the readouts or do you have to have a controller or something in between?

legend4life · 08-06-05, 04:41 PM

Quote:

Originally Posted by carlos_cet

Let me ask a stupid question. Can you hookup pinouts right to a pc and get the readouts or do you have to have a controller or something in between?

On OBD-2 cars they have simple OBD-II readers that can read the info from the ecu. On our OBD-1 you would need a piggyback fuel controller such as an SAFCII etc, or other controllers such as the HKS CAMP system, or a standalone engine management system to view the current running parameters of the engine and info etc.

carlos_cet · 08-07-05, 09:13 AM

I was thinking about reading info from the ecu and hooking it up to the carputer that I have but I always had the problem that you can't really do it with OBD-I .
Could I get a cheap controller to do this? The ones that I have seen are pretty expensive.

NickD · 08-09-05, 02:18 PM

Very nice man, sharing with the community, sweet.

Now, are you doing what I _THINK_ you are doing???

Seeb_95Legend · 08-17-05, 02:18 AM

finally.... about frekin time somebody posted the pin layout. Thank you so much

I've been looking for this for some time

this data is priceless

hehe I love a DIY project

I feel a project is reborn

many thanks,
Sebastian

legend4life · 08-29-05, 11:41 PM

Eh, I had begun planning this years ago, back in 2003 or so and I had the parts lying around for over a year and a half now. But my car was down for over a year sitting, which put all my projects on hold and I couldn't get anything done. So over the last few months after getting it back I've finalized all the research making sure it would work, I spent months talking to a Honda R&D engineer, top professional tuners around the US who fly around the world tuning 1000-2000hp cars and run EFI tuning schools and seminars, our own forum member Buzzard who tunes 550hp turbo Legend engines, a Top Fuel (4 seconds..) Bike builder, many of the top names in the import performance racing/tuning industry, even the engineers themselves who designed the standalone.

Then Kenso and I spent hours and hours over a long period of time figuring out the wiring and how to make everything work properly as far as interfacing the engine, all the sensors, and wiring, to the standalone ems. I posted up all the pinouts and wiring diagrams for the Legend ecu and sensors.

I installed the standalone engine management system, wideband o2 sensor and controller, some gauges, got everything running, and studied and researched all possible information I could get my hands on about tuning and internal combustion, etc etc. I thoroughly studied over 1,000 pages of documentation and reading. Learning and studying and having a bit of experienced help was extremely important becuase you can easily blow your engine with the smallest mistake, things you could least expect. It's NOT something you can just jump in and start playing with or messing with settings to experiment, or do by trial and error. The error here means bye bye engine, no second chance. The MAJORITY of people who tune their own standalone the first time USUALLY blow their motor, these cases are most common.

I began my own experimenting slowly, got everything running, began basic engine management setup and configuration, step by step got it idleing decently, had some help from local friends who did their own tuning and learned a bit from them, did WOT tuning, then part throttle, then playing with timing, then accel and decel fuel parameters, recently I've been fine tuning cruise and idle AFR for optimum gas mileage so I wouldn't be running inefficiently. I've got a good safe tune down so the car is running on the standalone full time daily driven on the street, with a good few thousand miles on it now.

The stock ecu runs about 13.1 AFR at WOT, and right at stoichiometric (14.7 AFR) at idle, cruise, and part throttle. Higher load part throttle (~70% load) dips in low 14s high 13s occasionally. It also runs decently conservative timing. At the moment I'm running a bit richer at WOT, and doing some testing I've found I seem to seeing the lowest injector duty cycles (how much fuel is being used) are seen right around stoichiometric ratio at 14.7 AFR. I'm currently seeing about 8% injector duty cycle cruising at 75mph or so. Theoretically the best gas mileage should be acheived going quite a bit leaner, at least 15-15.5 AFR, and some tuners lean it out to 16.0 AFR, but so far 14.7 still seems to be working best for me, going leaner seemed to pass the point of optimum efficiency and it began using more fuel again. I plan next to experiment with lower octane due to its different burn characteristics it is supposed to provide better gas mileage properly tuned, and also with higher timing numbers to get the most power that the fuel will support, of cource limited by knock.

Performance wise there is nothing more you could possibly dream of doing that it can not do. It's almost unlimited in tuning options and possibilities for performance. I'm currently revving it to 7500rpm and it just keeps pulling up to there without slowing down. I would rev it even higher till it stops pulling, but the Type II's topend power will probably be revving out really high, higher than I care to push my motor at the moment.

I have a 2-step secondary rev limiter set up for launching around 3500rpm, can cut either fuel, ignition, or both. Cutting ignition is great, the big loud popping backfires sound mean as hell. Might even try to get some flames to pop out from the late ignition event

.

The datalogging functions are amazing, you can log every possible engine parameter, from every sensor, thousands of times per second. Making changes and using the datalogging to measure differences or changes in performance and all parameters can be done using calculations that are simple enough to do, and you can set up mathematical formulas for them to be done for you automatically everytime.

Anyway I still don't have internet at home and school library is closing so I gotta run, I'll write more later.

-Imran

GreekPower · 08-29-05, 11:52 PM

Sweet which EMS? I am looking into this for a twin turbo legend project. I have the AEM EMS on my stealth and tuned it on a supra I would love to know which one u picked being there is AEM, Haltek and ect

GSteg · 08-29-05, 11:53 PM

You are the man.

Teach us Engine Management 101

hotlavaflow · 08-30-05, 01:29 AM

I am very interested in which EMS you decided to go with.

95Legend6Spd · 08-30-05, 01:47 AM

Good job Imran! And they said that it wouldn't work! Keep that WB O2 datalogging, and jump into it!

07-31-05, 04:08 PM	#1 (permalink)
legend4life Blk/BlkGS6 Join Date: Jan 2002 Location: Buffalo, NY Posts: 1,779 Car 1: '94 Black/Black Legend GS Sedan 6 Speed Car 2: '92 Silver LS Coupe Car 3: '94 Cashmere L Sedan iTrader: (1)	Legend Ecu Pinouts And Wiring Diagrams LEGEND ECU CONNECTOR SHOT LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR A LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR B LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR C LEGEND ECU PIN LOCATIONS AND COLORS WIRE SIDE VIEW OF CONNECTOR D LEGEND ECU BRIEF PIN TO SENSOR DIAGRAM 1 LEGEND ECU BRIEF PIN TO SENSOR DIAGRAM 2 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 1 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 2 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 3 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 4 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 5 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 6 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 7 LEGEND ECU DETAILED PIN TO SENSOR DIAGRAM 8 This info was invaluable to me in my project, and I am sure it will be to all of you in your projects as well. I have more info that I am organizing and compiling and I will update this or make a new thread soon. These diagrams were acquired from the electrical manual at the Acura dealership, shots taken by the man, Kenso. Enjoy guys!! Mod, I would request for a sticky on this info please. Thanks, Imran __________________ Black/Black GS 6 speed FS $3800 OBO Lots of mods/parts FS To contact me, e-mail desijigga786@gmail.com

08-01-05, 04:01 AM	#2 (permalink)
skate4ever999 Registered User Join Date: Jun 2003 Location: denver co Posts: 830 Car 1: 1995 acura legend iTrader: (0)	wow thanks a lot!!!! __________________ http://www.imagestation.com/picture/...b/f4005adb.jpg

08-01-05, 08:42 AM	#3 (permalink)
carlos_cet AKY LEGY Join Date: Jun 2002 Location: NE/TRI STATE Posts: 248 Car 1: 92 Legend Sedan LS iTrader: (0)	Does anyone know if it's possible to use these pinouts and connect them to a pc or laptop to get data? __________________ "Don't speak about it, be about it." K&N Intake Legend Specific Remus Exhaust Cyber BodyKit Clear Corner Lights Koni's Custom Front Grill Custom Ground Wire Kit KMS Strut Bar Sunroof Mod Speaker Mod Pioneer Premier System Carputer

08-02-05, 07:07 PM	#5 (permalink)
sr79labrat SR79 Labrat Join Date: Nov 2003 Location: CO-Springs Posts: 1,180 Car 1: Acura Legend iTrader: (7)	Awesome!!! Ben and Imran-thanks a bunch for all of the help! Lata, Kyle Should help with the AVCR. __________________ Turbo Legend Parts & Project Updates!!! Myspace- http://profile.myspace.com/index.cfm...id=246 854652

08-03-05, 08:55 AM	#6 (permalink)
carlos_cet AKY LEGY Join Date: Jun 2002 Location: NE/TRI STATE Posts: 248 Car 1: 92 Legend Sedan LS iTrader: (0)	Let me ask a stupid question. Can you hookup pinouts right to a pc and get the readouts or do you have to have a controller or something in between? __________________ "Don't speak about it, be about it." K&N Intake Legend Specific Remus Exhaust Cyber BodyKit Clear Corner Lights Koni's Custom Front Grill Custom Ground Wire Kit KMS Strut Bar Sunroof Mod Speaker Mod Pioneer Premier System Carputer

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08-07-05, 09:13 AM	#8 (permalink)
carlos_cet AKY LEGY Join Date: Jun 2002 Location: NE/TRI STATE Posts: 248 Car 1: 92 Legend Sedan LS iTrader: (0)	I was thinking about reading info from the ecu and hooking it up to the carputer that I have but I always had the problem that you can't really do it with OBD-I . Could I get a cheap controller to do this? The ones that I have seen are pretty expensive. __________________ "Don't speak about it, be about it." K&N Intake Legend Specific Remus Exhaust Cyber BodyKit Clear Corner Lights Koni's Custom Front Grill Custom Ground Wire Kit KMS Strut Bar Sunroof Mod Speaker Mod Pioneer Premier System Carputer

08-09-05, 02:18 PM	#9 (permalink)
NickD Bk F*er Join Date: Jan 2002 Location: Lebanon, NJ Posts: 2,633 Car 1: 1991 Frost White L Sedan Car 2: 1999 BMW 328i 5speed iTrader: (0)	Very nice man, sharing with the community, sweet. Now, are you doing what I _THINK_ you are doing??? __________________ 1991 Legend L Hybrid (gallery) 1989 Legend L 5speed (totaled) 1999 BMW 328i 5 speed http://demandred.dyndns.org/sig-small.jpg http://demandred.dyndns.org/bmw-small-sig.png

08-17-05, 02:18 AM	#10 (permalink)
Seeb_95Legend Registered User Join Date: Jan 2004 Location: Phoenix, AZ Posts: 976 Car 1: SOLD - 1995 4dr Legend Sedan Car 2: MK4 Supra single T iTrader: (0)	finally.... about frekin time somebody posted the pin layout. Thank you so much I've been looking for this for some time this data is priceless hehe I love a DIY project I feel a project is reborn many thanks, Sebastian __________________ http://www.imagestation.com/picture/...a/f3eda75b.jpg Ram Intake Remus exhaust Bayou Stage2 TB Coolant bypass Blue Ground kit DV8 y-pipes & high flow cat. Last edited by Seeb_95Legend : 08-17-05 at 02:34 AM.

08-29-05, 11:41 PM	#11 (permalink)
legend4life Blk/BlkGS6 Join Date: Jan 2002 Location: Buffalo, NY Posts: 1,779 Car 1: '94 Black/Black Legend GS Sedan 6 Speed Car 2: '92 Silver LS Coupe Car 3: '94 Cashmere L Sedan iTrader: (1)	Standalone Engine Management System is Done Eh, I had begun planning this years ago, back in 2003 or so and I had the parts lying around for over a year and a half now. But my car was down for over a year sitting, which put all my projects on hold and I couldn't get anything done. So over the last few months after getting it back I've finalized all the research making sure it would work, I spent months talking to a Honda R&D engineer, top professional tuners around the US who fly around the world tuning 1000-2000hp cars and run EFI tuning schools and seminars, our own forum member Buzzard who tunes 550hp turbo Legend engines, a Top Fuel (4 seconds..) Bike builder, many of the top names in the import performance racing/tuning industry, even the engineers themselves who designed the standalone. Then Kenso and I spent hours and hours over a long period of time figuring out the wiring and how to make everything work properly as far as interfacing the engine, all the sensors, and wiring, to the standalone ems. I posted up all the pinouts and wiring diagrams for the Legend ecu and sensors. I installed the standalone engine management system, wideband o2 sensor and controller, some gauges, got everything running, and studied and researched all possible information I could get my hands on about tuning and internal combustion, etc etc. I thoroughly studied over 1,000 pages of documentation and reading. Learning and studying and having a bit of experienced help was extremely important becuase you can easily blow your engine with the smallest mistake, things you could least expect. It's NOT something you can just jump in and start playing with or messing with settings to experiment, or do by trial and error. The error here means bye bye engine, no second chance. The MAJORITY of people who tune their own standalone the first time USUALLY blow their motor, these cases are most common. I began my own experimenting slowly, got everything running, began basic engine management setup and configuration, step by step got it idleing decently, had some help from local friends who did their own tuning and learned a bit from them, did WOT tuning, then part throttle, then playing with timing, then accel and decel fuel parameters, recently I've been fine tuning cruise and idle AFR for optimum gas mileage so I wouldn't be running inefficiently. I've got a good safe tune down so the car is running on the standalone full time daily driven on the street, with a good few thousand miles on it now. The stock ecu runs about 13.1 AFR at WOT, and right at stoichiometric (14.7 AFR) at idle, cruise, and part throttle. Higher load part throttle (~70% load) dips in low 14s high 13s occasionally. It also runs decently conservative timing. At the moment I'm running a bit richer at WOT, and doing some testing I've found I seem to seeing the lowest injector duty cycles (how much fuel is being used) are seen right around stoichiometric ratio at 14.7 AFR. I'm currently seeing about 8% injector duty cycle cruising at 75mph or so. Theoretically the best gas mileage should be acheived going quite a bit leaner, at least 15-15.5 AFR, and some tuners lean it out to 16.0 AFR, but so far 14.7 still seems to be working best for me, going leaner seemed to pass the point of optimum efficiency and it began using more fuel again. I plan next to experiment with lower octane due to its different burn characteristics it is supposed to provide better gas mileage properly tuned, and also with higher timing numbers to get the most power that the fuel will support, of cource limited by knock. Performance wise there is nothing more you could possibly dream of doing that it can not do. It's almost unlimited in tuning options and possibilities for performance. I'm currently revving it to 7500rpm and it just keeps pulling up to there without slowing down. I would rev it even higher till it stops pulling, but the Type II's topend power will probably be revving out really high, higher than I care to push my motor at the moment. I have a 2-step secondary rev limiter set up for launching around 3500rpm, can cut either fuel, ignition, or both. Cutting ignition is great, the big loud popping backfires sound mean as hell. Might even try to get some flames to pop out from the late ignition event . The datalogging functions are amazing, you can log every possible engine parameter, from every sensor, thousands of times per second. Making changes and using the datalogging to measure differences or changes in performance and all parameters can be done using calculations that are simple enough to do, and you can set up mathematical formulas for them to be done for you automatically everytime. Anyway I still don't have internet at home and school library is closing so I gotta run, I'll write more later. -Imran __________________ Black/Black GS 6 speed FS $3800 OBO Lots of mods/parts FS To contact me, e-mail desijigga786@gmail.com

08-29-05, 11:52 PM	#12 (permalink)
GreekPower Banned Join Date: Aug 2005 Location: Pittsburgh,PA Posts: 10,458 Car 1: 1992 Acura L"S" Sedan Car 2: 1991 3/S Turbo's 2x Car 3: 2005 Grand Prix iTrader: (13)	Sweet which EMS? I am looking into this for a twin turbo legend project. I have the AEM EMS on my stealth and tuned it on a supra I would love to know which one u picked being there is AEM, Haltek and ect

08-29-05, 11:53 PM	#13 (permalink)
GSteg Join Date: Sep 2003 Location: California Posts: 2,518 Car 1: 1992 iTrader: (0)	You are the man. Teach us Engine Management 101 __________________ 1992 Acura Legend LS sedan

08-30-05, 01:29 AM	#14 (permalink)
hotlavaflow 'hood Garage Join Date: Sep 2002 Location: cough up a lung, where I'm from, Bklyn son Posts: 3,256 Car 1: '91 Twin Turbo 5/6 spd Panda/Type C Car 2: KA24DE-T S13 iTrader: (3)	I am very interested in which EMS you decided to go with. __________________ DO NOT FEED THE ANIMALS AEM powered Twin Turbo KA7 since Feb'07

08-30-05, 01:47 AM	#15 (permalink)
95Legend6Spd Pain Machine Join Date: Jan 2002 Location: Nashville, TN Posts: 1,817 Car 1: Godzilla: Car 2: Tokyo Car 3: Attack! iTrader: (0)	Good job Imran! And they said that it wouldn't work! Keep that WB O2 datalogging, and jump into it! __________________ *\| Chris M \| 1997 Toyota Supra 6-Speed \| 78GTS* \| 17X10s NT-01s All 4 Corners \| \| Old: 1994 "BoostLogic Catalog" TH400/Single 71GTQ \| Advan \| TRUST \| HKS \| RPS \| \|Previous: 1995 Legend Coupe, 6-Speed 1998-2002\|**