Need help with a few wires 2JZ to MX83 thanks

[ujw296]

Hi All

There is a B-R, GR and B-Y wire at the MX83 EFI M/REL connector and from the 2JZ loom I have some spliced B-R then a B-Y and a B-W wire (constant 12v from battery) as shown in the attachments.
Do I just connect up the GR from the original connector along with the 2JZ B-R's & B-Y or do I need to connect the original MX83 B-R & B-Y wires in too?

MX83:

wire 1 B-R goes to COR & ECU T5 connector +B & +B1 (but I don't get continuity at ECU or COR connector?)
wire 2 GR & 3 B-Y go to ECU T5 connector for M/REL & BATT (continuity for each wire)

I only have the USDM diagrams.

Also where do the mx83 T5 ECU connector wires P, S, M & L connect to in the 2JZ setup?
Cheers

[madmont]

The GR wire from the number 24 pin on the Supra ecu connects to the GR wire on the M/REL
The B-R wire from the M/REL connects to the B-R wire from the supra ecu pin 31
the B-Y is constant 12v from battery B-Y wire from Supra ecu has 12v constant
Supra does not use COR

[ujw296]

Thank you once again madmont.

The loom that I have fitted has different wire colour codes, see attachment but I have a spare loom which is has the colours/pins as you stated.

So I will go by the pin numbers you quoted.

I won't be using the COR relay as I had one of wilbo666's magic boxes made. If that doesn't work I will be getting that pump ECU off you.

With the P, L, M and S pins on the original T5 ECU connector did you connect anything or was there no need because there are wires from the 2JZ trans to the 2JZ ECU already for this purpose?
Cheers

[madmont]

The M wire on the Supra ECU pin 18 needs to be switched to earth unlike the M wire on the Cressida which is switched to 12v . I put in a relay
P L and S wires do not need to be connected to Supra ecu
Wire from pin 28 {OD switch}in the Supra ecu needs to be switched to earth. Wire from the Cressida OD switch may be connected to this one.
When testing the operation of the OD switch bear in mind that OD may not work until a couple of km of driving has been done to warm up to operating temp

[ujw296]

Thank you madmont.
Good information as usual.