Wiring Peer Review? Aristo ECU/Harness in 91

JPsToyota

Member
Sep 17, 2008
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East-Central, FL
Found this in my folder of Aristo/1JZ/MKIII Supra schematics. It's marked "Aristo TT Pinout" and it's not the ECU. Is that what you're looking for?

aristottpinout.jpg
 

K_SHAN

don't taze me bro!
Jul 3, 2009
357
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eagle, IDAHO!
The B1 pin 9 B/O (thin wire) goes to pin 1 B/O on E10...ok,
but the B1 pin 14 B/O (thick wire) goes to pin 22 on the big junction Aristo grey plug,which is a thick wire to !!!
It is the +12v IGN for ignitor,injectors etc.!!! It is the power source to the
engine itself
That's why you only crank the motor...and not start it!


how about on a udsm/jspec supra harness?
 

K_SHAN

don't taze me bro!
Jul 3, 2009
357
0
0
33
eagle, IDAHO!
mainly wondering about the thick black-orange wire "pin 14 on B1"

what pin does it go on for a supra pin-out

i am having a hard time making sense of all of this (i am confused from reading a million different answers)
 

crazy3rdgen

New Member
May 2, 2015
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USA
Satan;835076 said:
After battling the wire gremlins, I am starting over with the documentation and making sure that the connections match. Can you guys take a look and help verify? I will use this tomorrow to rewire and verify everything. There may be mistakes, since I've been cutting and pasting from several sources (which may have been wrong). I've gone through and double-checked the info below. Let me know what ya think and maybe we can finalize it for others to use.

E9 & E10 ECU Connector info -
http://supras.nl/index.php?option=com_content&task=view&id=34&Itemid=50

Aristo body plug (is really 4 separate connections in one - C, D, E, & F) -
http://www.g099521.net/MKIII/2JZ_SWAP/pinout_test.xls

1JZ Reference docs from Rick's site (zipped) -
http://www.g099521.net/MKIII/2JZ_SWAP/ea21989.zip



1991 Auto to 2JZ/R154 (Aristo ECU/harness)

M1 PLUG:
Pin #1 R/B wired to W at tranny connector (Reverse lights).
Pin #2 Y wired to B at tranny connector (Reverse lights).
Pin #3 Pink to E10 Pin #2 Pink (SP1, no 1 vehicle speed sensor from trip/odo meter)
Pin #4 B to E10 Pin #16 B/W (Taco, Tachometer signal)
Pin #5 not connected
Pin #6 wired to aftermarket sender?
Pin #7 wired to D Pin #1 Y/R (oil level - Body plug) - Will rewire using 7M sender
Pin #8 not connected
Pin #9 not connected??????? ("W" signal for check engine)
Pin #10 to Pin F9 Y/G (Water temp sender for combination meter) - Aftermarket sender
Pin #11 wired to E10 Pin #15


B1 PLUG:
Pin #1 not connected
Pin #2 not connected
Pin #3 not connected
Pin #4 Green to Pin #29 (C15 – G/W) body plug – FP signal to diag (currently have this grounded so that pump comes one when key is on)
Pin #5 B/L to E10 Pin #31 on ECU connection - A/T coil for circuit opening relay
Pin #6 Y not connected
Pin #8 NSW to cruise control clutch switch (MT)… Don’t have?
Pin #7 R/B to E10 Pin #32 on ECU connection - Plus for circuit opening relay
Pin #9 B/O to E10 Pin #1 on ECU connection - Ignition switch
Pin #10 B/W to Pin #54 (E4 – B/L) body plug - to neutral st. switch
Pin #11 Idle Up signal from A/C amplifier --- Needed? Where to connect?
Pin #12 Theft deterrent horn signal --- Needed? Where to connect?
Pin #13 A/C water temp switch --- Needed? Where to connect?
Pin #14 B/O to E10 Pin #1 on ECU connection
Pin #15 SPD signal for cruise control --- Needed? Where to connect?


B2 PLUG:
Pin #1 Airbag signal check connector --- Where to connect?
Pin #4 R/Y to E10 Pin #15 on ECU connection
Pin #6 Violet to D Pin #5 body plug Grey/red (not needed?)
Pin #7 W to E9 Pin #76 on ECU connection - 'N' signal from A/T indicator S/W
Pin #20 Y/L to E9 Pin #64 on ECU connection - IDL
Pin #2 not connected
Pin #2 not connected

E10 & C1 PLUG:
Pin #24 to C1 Pin #2 (Black/Orange - M-Relay)
  • Body plug has two black/orange wires going to one pin. Soldered them to the big fat wire coming from plug B1 Pin #14
Pin #31 Black/Red = B+ (Connected to C1 Pin #4 & B1 Pin #7)
Pin #32 Black/Red = B1+ (Soldered to C1 Pin #4 & B1 Pin #7)
Pin #33 W/R C1 Pin #1 (Black/Yellow = BATT)



SO you have Pin #4 Green to Pin #29 (C15 – G/W) body plug – FP signal to diag (currently have this grounded so that pump comes one when key is on). Pin 29 is a cat temp sensor. Explain that one
 

crazy3rdgen

New Member
May 2, 2015
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USA
K_SHAN;1780906 said:
mainly wondering about the thick black-orange wire "pin 14 on B1"

what pin does it go on for a supra pin-out

i am having a hard time making sense of all of this (i am confused from reading a million different answers)

Youre not the only one, people dont know how to stay on the same page, there isnt many write ups for these on wiring so you'd hope the information being shown to everyone would be correct.
 

Satan

Supramania Contributor
Mar 31, 2005
1,594
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36
Tampa
crazy3rdgen;2050017 said:
Still curious to know how your leading post says PIN 4 to pin 29 followed by going to c15 LOL

Just "scattered notes:

B1 Pin 4 is for the FP signal, which would go to the Aristo's big plug (#29 in the diagram on post #42). That plug is really 4 subconnectors C, D, E, & F. The C connector (pin 15) within that plug is the same thing. Goes to the diag box. I removed the diag box and just grounded B1 Pin 4.

Hope that helps.