ecu master digital tuner 3 on 7MGTE

[laxboy36]

Hey guys maybe you can help me with this, I also just got this piggyback and the shop can't figure it out, I have an 88 7mgte and when they wired it up the guy tuning it can't get the car right at all. Does anyone know the wiring diagram for an 88 ecu, or something to help them out.

 

[chesky911]

I 'm going to buy a DET3 but I have not understood the wiring diagram yet
the engine is 1990 stock 7M
I am confused with some wires

DET3: ------> (Symbol) (Terminal name) 7M ECU

Pin 1 (+12V)---------->(+B) (EFI Main Relay)
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6(Ignition Out)---->(NE) (Cam Position Sensor)
Pin 7(Frequency Out)->(KS) (Air Flow Meter)
Pin 8(Pullup)------2.4 kΩ + Pin 10(Frequency In) ------->(KS)(Air Flow Meter) ??I am confused
Pin 9(Ignition In)------>(IGNITER NE does not exist) 7M ecu pins are IGNITER: IGT or IGDA or IGDB or IGF?????

Pin 11(Ground)-------->(E01)(Power ground)
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Pin 17
Pin 18
Pin 19
Pin 20

Pin 7 , pin 8 and pin 10 go together to KS??

Could you help me to finish wiring diagram please?
Thanks

 

[chesky911]

i have drawn a wiring diagram but i dont know if it is correct...

 

[GreenChevelleSS]

The 2.4k ohm resistor goes from pin 8 to pin 10, then the wire from pin 10 goes the the AFM, The resistor does not go between 10 and the afm. If you get what I mean.

Pin 7 is the FREQ OUT wire that will go to the ECU. So basicly your cutting the AFM wire that is going to the ECU and the AFM side is going to pin 10 and the ECU side is going to pin 7


Also you need to use BI POLAR OUT instead of IGN OUT on the pin out on the DET3

 

[chesky911]

Thanks GreenChevelle!

The final picture




PD: Sorry,but NE symbol pin is Cam Position Sensor

 

[johnd]

Nice diagram chesky, good info!

 

[GreenChevelleSS]

OK im wiring up the IAT sensor, I know one wire goes to the analog input 4, does the other wire go to ground?

 

[suprasick]

This worked for me: http://forum.ecumaster.com/viewtopic.php?f=20&t=342

 

[GreenChevelleSS]

So it needs to be hooked to 5v ref. I hooked it to ground and it pretty much always reads 100C

 

[sheedy126]

Mine was wired to a analog input. Let's say #4, other to ground. Just make sure to define the analog input you're using for what sensors in the software

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[GreenChevelleSS]

OK so I got the det3 converted over to map, thing is the table is mostly incomplete, So I started using the log window to verify what is there is correct and its way rich. According to the Freq IN vs the Freq Out. So ive started adjusting the fuel table to get them as close as possible Using the logger and the freq in vs the freq out, To keep it running pretty much like stock. I do have wideband to install and im going to get it done soon to start logging that, then I will tune on that and remove the AFM

 

[sheedy126]

Good idea to install your wideband before you mess with the maps too much. If you need one to get started I can send you my old one before I switched to the ecu masters emu

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[Nick Squire]

Hey guys, does anyone have any pictures of their install, ie where you installed it in your car, and whether you made a harness or just cut up yours etc. i'm thinking about biting the bullet on one of these

 

[sheedy126]

I mounted mine to my factory ecu with some 3m double sided tape.
I didn't make a harness but just tapped into the factory harness since the det3 is easily removable with a connector. The wires from my det3 to harness are only a few inches long.

I don't have any pictures of the mount though :/

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[Nick Squire]

that sounds good, I was just worried about tapping into the factory harness, sounds permanent

 

[Nick Squire]

hey guys, I've now received my DET3 and I'm going to install it this week, I don't know anything about tuning etc but it's all I've been reading about this past month. What did you guys set your launch control parameters to to get 8lbs off the line with a ct-26, I'm sure I can figure it out just thought it'd be nice to have a reference point.

Thanks

 

[TRC]

Hi guys does anyone have the stock ECU pin out schem? I dont want to mess up,just want to be sure where to conect the wires.

 

[sheedy126]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=D&P=5
^this is for 89+ iirc

hope that helps. i find it easiest to print off those few pages and tape them together. then highlight the terminals on the pages when done

 

[Bmettie]

Better pic
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=31

 

[ihiryu]

Hey guys, I'm trying to figure out how to do the IAT install. I'm using a GM style sensor, do I need to add the resistor? I'm not in fuel implant mode, so I'm not taping into the stock sensor.

There's already a scale table for the GM map sensor in the software, but wanted clarification on it. Have any of guys started messing with boost control yet?