Circuit opening relay bypass unit query

[ujw296]

Hi Again
Has anyone used or can anyone tell me how to wire up wilbo666' magic box on a MX83 with 2JZ engine, transmission and ECU please?
It looks like one wire connects to an ECU FPC pin and the other to the Circuit opening relay or fuel pump relay?
Which relay and wire is correct on the MX83 and do I connect the other wire to the MX83 T5 ECU FPR pin (not the 2JZ ECU FPC pin)?
The FPC to COR trigger circuit is here:
http://wilbo666.pbworks.com/w/page/4...20COR%20Wiring

The MX83 T5 ECU connector is still in place with the FPR pin.

Thanks

[auto351]

http://www.toymods.org.au/forums/tec...ewer-ecus.html

are you using factory 2JZ ECU? the above post has all the info in that case.

[ujw296]

Thanks auto351

It is a factory 2JZ-GE ECU.

I went to that link you sent and now I am even more confused after reading all the electronics theory. I would just like to know where to connect the 2 wires from wilbo666' unit on my car setup.

I don't know what way to connect it up but I did wonder about the following ways of connecting the wire to relay if any of them are viable:

To Pin 4 (G) ex. AFM of the COR now that there is no AFM?
Splice it into pin 1 (G-W) and leave the G-W connected to the COR and fuel pump relay?
Disconnect the G-W wire at the COR and connect the unit to it prior to the fuel pump relay?

Do I connect the FPC wire to my MX83 FPR pin (T5 ECU connector) or the 2JZ FPC pin?
Cheers

[auto351]

GND Connected 0Volts Chassis
ECU FPC Connected 2JZ ECU FPR (Input into unit)
COR Connected MX83 Fuel Pump Control Relay PIN 3 (G-R) (Output from unit - Open collector/drain this provides a effective OVolts when active)


Note: you may want to fuse the COR just till you have it sorted about 200ma fuse will fine, Max current draw rated 400ma

[ujw296]

Thank you again auto351

If I connect the COR wire of the unit to the MX83 Fuel Pump Control Relay PIN 3 (G-R) will it work okay as it looks to me that the COR is open circuit from the G-W wire pin 1 to the B-R wire pin 2?

It's doin my head in :-)

[dumbass]

Just use an LPG rpm relay
I use them for all my conversions when the ecu can't trigger a COR

[ujw296]

Thanks dumbass

I was going to try one before I found this device.

Would you recommend the Peel CP30 or GASTEC LPG/CNG satety switch or some other?
Do you connect into the negative side of the 2JZ coil with no problem?

Cheers

[dumbass]

The COR needs a neg trigger
The gas relays provide a positive trigger
I get custom ones made from peel so they work with a neg trigger In bulk order
They will work off the tacho signal from 2j ignitor

[ujw296]

So I need a LPG rpm relay not a Peel CP30 or GASTEC LPG/CNG safety switch.

Back to the researching :-)

[wilbo666]

In the circuit I made uses the FPC (the pulse width modulated signal from the engine ECU, in your case on the 2JZ engine ECU) signal, and a few components to basically replace the switch inside the Air Flow Meter that normally triggered the COR, now that the AFM has been removed as a result of the engine conversion.

I can see how 7M can be a little be more confusing as it has the "Fuel Pump Control Relay" as well, which is really two speed control for the fuel pump. You can ignore the Fuel Pump Control Relay, and the fuel pump should run at full speed all the time, so ignore it for now.

OK, so I used the "Drain" pin of the transistor in my circuit to trigger the vehicles existing COR. The Drain of the transistor should connect to the same pin on the COR as the AFM used to connect to. I hate using wiring colours so I can't tell you what colour wire it is, I suggest you trace the wiring with a multimeter!

The below sounds correct to me.

To Pin 4 (G) ex. AFM of the COR now that there is no AFM?

I have no idea what you mean in the below :S

Do I connect the FPC wire to my MX83 FPR pin (T5 ECU connector) or the 2JZ FPC pin?
Cheers

I also suggest you read this page on my wiki if you haven't already...
http://wilbo666.pbworks.com/w/page/4...pening%20Relay

These two images below pretty well show what we are trying to do...

The top section shows how your 7M-GE was from factory...see how the AFM has a switch that triggers the COR to turn it on and hence turn the fuel pump on?

In the bottom section you can think of the box with the transistor in it that is labelled "ECU" as the circuit you have made to convert from the 2JZ FPC output pin to trigger the COR. So, connect the drain of the transistor so that it connects to the Fc pin on the COR (where the AFM used to connect to...). And in our special circuit the "input" to the circuit so it can work isn't a "Ne" signal, it is the FPC output from the 2JZ engine ECU...

I hope this is clear?



Cheers
Wilbo

[dumbass]

The peel and LPG relays are all the same thing
LPG relays have a pos trigger
That's y I get peel to modify them for me

[auto351]

If I connect the COR wire of the unit to the MX83 Fuel Pump Control Relay PIN 3 (G-R) will it work okay as it looks to me that the COR is open circuit from the G-W wire pin 1 to the B-R wire pin 2?

It's doin my head in :-)

Yes , forgot about the air flow meter.

correction


COR Connected MX83 Fuel Pump Control Relay PIN 3 (G-R) AND Circuit Opening Relay PIN 4 (G)

Im guessing the ECU pictured in the below is getting removed
http://www.toymods.org.au/forums/att...ery-cor-t5.jpg

[ujw296]

auto351

Yes the MX83 ECU has been removed but one of it's connectors is part of the underdash wiring (T5) with a couple of required pins.

http://www.toymods.org.au/forums/att...cu-mounted.jpg

cheers

[ujw296]

Thanks Wilbo

I did read your wiki post thanks.

I am thinking that the magic box was incorrectly made as I can't get it to function as it should :-(

What I mean't by "Do I connect the FPC wire to my MX83 FPR pin (T5 ECU connector) or the 2JZ FPC pin?" was that there is still a MX83 ECU connector wired in behind the dash unlike the other connectors that are part of the engine loom. It has a FPR pin still wired in that according to the USDM EWD/Repair manual diagrams goes to the fuel pump relay (as shown in the COR and T5 diagram)

The MX83 ECU diagram was just as a reference, it was removed in total and sold with the 7M

Cheers

[wilbo666]

The 'magic' box should be pretty easy to test...

>Connect the ground (to the 'Source' pin of the transistor)
>Connect a relay (any relay) with one side of the coil to +12V and the other side of the relay coil to the transistor 'Drain' pin
>When you connect +12V to the input of the circuit that is labelled 'ECU FPC Pin' the relay should click, and it should go off when you remove the +12V...

If it doesn't work, then there really isn't that much to it! Trace the circuit and make sure everything is connect to the right things! Check the transistor is in the correct way (look up the datasheet!), check the diodes are in the right way, check the capacitor is in the right way, check the right value resistors are in the correct spot...!

That's about it really

Cheers
Wilbo