Author Topic: Urgent help.  (Read 30418 times)

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Offline Pure_Sincerity

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Urgent help.
« on: Feb 21, 2013, 02:10PM »
My wiring for the stand alone is done, and I can start te car any moment, BUT 1 problem.

I need to trace down the 12v power source for the injectors and splice it into the ECU power supply (pin 38) BEFORE the engine control relay so the megasquirt and injectors power up at the exact same time.

Where the fuck is this 12v injector power source wire located ?

You got the 4 12v power source wires coming off the injectors (1 for each) than they merge into 1 somewhere along the line. Where is it behind the dash ?
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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #1 on: Feb 21, 2013, 02:27PM »
So once the wires get down behind the dash, they separate, 1 big bundle of wires that go over to the stock ecu, than a few separate ones branch off going elsewhere. Since the 12v injector power source don't go to the ecu, I would say ONE of those wires branched off would be the 12v power source ? Just colour match it those coming from the injectors ?
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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #2 on: Feb 21, 2013, 02:55PM »
Looked at the injector wire colours. They all have 1 light green wire than all the others are different. I dare say that the light green wires are the 12v power source. Looking back under the dash from the drivers side, as I said before, most of them branch off to the passenger side and into the stock ecu, than the few others go into plugs than lead else where. As I said before, the injector 12v power source does not go to the factory ecu than one of these wires branched off must be the 12v ? There is 1 wire, the exact same colour light green as what I believe to be the 12v source, so I would say this is it ?
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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #3 on: Feb 22, 2013, 09:57AM »
33 reads and no answer :(
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Offline SSS

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Re: Urgent help.
« Reply #4 on: Feb 22, 2013, 11:44AM »
Have you even looked at the wiring diagrams in the FSM?
It will tell you where it is and what colour / trace is on that wire.

Offline SSS

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Re: Urgent help.
« Reply #5 on: Feb 22, 2013, 12:13PM »
Red / Blue wire on back of SMJ connector 1E; pin is E1.

Took me 15mins to find it.

Check that it has 12v when the key is at ACC and ON; and with the key at OFF also check that it has continuity with pin 34 on the connector side of the long blue standard ecu plug.
« Last Edit: Feb 22, 2013, 12:16PM by SSS »

Offline noss

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Re: Urgent help.
« Reply #6 on: Feb 22, 2013, 12:25PM »
33 reads and no answer :(

you'll probably find that with a topic like "urgent help" you'll get a lot of looks, but then when people read the content of the post they probably have no input because they simply do not know. people aren't going to reply with "sorry don't know"

you'll now probably see the views creep up because they'll want to see what adam said.

you still won't get any replies.

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Offline Colby

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Re: Urgent help.
« Reply #7 on: Feb 22, 2013, 12:56PM »
Sorry don't know  :P

Offline Pure_Sincerity

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Re: Urgent help.
« Reply #8 on: Feb 22, 2013, 01:02PM »
Have you even looked at the wiring diagrams in the FSM?
It will tell you where it is and what colour / trace is on that wire.

I have looked in the FSM, all I saw was the 4, 12v power wires comin of the injectors and joining into 1 than up to the top of the page pass the ecu power relay than I got lost.

Red / Blue wire on back of SMJ connector 1E; pin is E1.

Took me 15mins to find it.

Check that it has 12v when the key is at ACC and ON; and with the key at OFF also check that it has continuity with pin 34 on the connector side of the long blue standard ecu plug.

Red wire/blue stripe ? What's the SMJ connecter ? Lol
I will have to re read my FSM in a sec, no idea where you found that info, I couldn't find shit.
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Offline Kranzy

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Re: Urgent help.
« Reply #9 on: Feb 22, 2013, 01:55PM »
I didn't reply, because without being able to check things with a multimeter talking about it doesn't mean anything. Wiring through cars can change colours from one connector to the next so its very hard to diagnose an issue without being there first hand to look at it.

Its very easy to say yeah its the green wire. Then you wire it up and your ecu goes bang and then you'll be back here with more issues than you started with.

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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #10 on: Feb 22, 2013, 02:05PM »
SSS, what FSM do you have ? I have the Gregory's autofix, Pintara/corsair owners service manual.

I can not find it for the life of me. Just spent 20 minutes going through it, on the page with the wiring diagram for the car, it does not state the wire colour, and what is the SMJ connecter?

This is literally the last thing I have to do before I can start the car for the first Time.
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Offline Kranzy

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Re: Urgent help.
« Reply #11 on: Feb 22, 2013, 02:18PM »
Grab the fsm that can be downloaded from antrx. It's the full service manual from Nissan.
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Offline Kranzy

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Re: Urgent help.
« Reply #12 on: Feb 22, 2013, 02:21PM »
Quote from: noss
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Offline SSS

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Re: Urgent help.
« Reply #13 on: Feb 22, 2013, 02:25PM »
Pg 824 / 894 of fsm

Offline SSS

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Re: Urgent help.
« Reply #14 on: Feb 22, 2013, 02:31PM »
fsm for FACTORY SERVICE MANUAL

Offline Pure_Sincerity

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Re: Urgent help.
« Reply #15 on: Feb 22, 2013, 02:36PM »
fsm for FACTORY SERVICE MANUAL
i asked what SMJ was :P not fsm. im looking through the one you just linked me kranz, cheer guys ^_^
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Offline noss

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Re: Urgent help.
« Reply #16 on: Feb 22, 2013, 03:37PM »



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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #17 on: Feb 22, 2013, 04:06PM »
So now every single last piece of my dash is out, just so I have enough room to get to this SMJ connector.

But 1 question, no where on those pages in that FSM state that the injector 12v power source is in that SMJ nor does it state what pins are what it colours of wires, so how do you know that 1E, pin E1 is the right pin ? And it is impossible to get to, I have metal framing surrounding it. That's if it's even the right SMJ. There are only 2 here, but 4 SMJ connectors on the paper, I'm looking at the 1 far right on the divers side.

I'll put a pic up in a sec of what I think It is, and the wire is red with a black stripe in what should be pin E1.
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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #18 on: Feb 22, 2013, 04:16PM »


how much of the dash i had to pull out to get to the connector on the far right, thats right, all of it. Never gonna be the same again :(








This is the only SMJ conncetor i can find that even looks remotely like the one i need. That red wire with BLACK stripe is the wire in the E1 Pin. would this be it ?
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Offline SSS

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Re: Urgent help.
« Reply #19 on: Feb 22, 2013, 04:37PM »
Sorry, it could be red / black;  the wire was marked "R/B".

Offline Pure_Sincerity

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Re: Urgent help.
« Reply #20 on: Feb 22, 2013, 04:43PM »
Imma risk it, that should be it, that's what I'll wire into the ECU power pin 38 before the relay to get the megasquirt and injectors to power at the same time.
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Offline SSS

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Re: Urgent help.
« Reply #21 on: Feb 22, 2013, 06:12PM »
Check it FIRST like I mentioned above, just don't hook it up and pray for the best.

Offline Pure_Sincerity

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Re: Urgent help.
« Reply #22 on: Feb 23, 2013, 08:45AM »
I'm going to get my dad to do it tomorrow, I've never used a multimeter before, than if it is giving off the 12v than I'll wire it in.
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Offline SSS

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Re: Urgent help.
« Reply #23 on: Feb 23, 2013, 09:12AM »
No offense aaron, credit where credit is due for giving it a go, but I strongly recommend that you get an auto elec to check your wiring.

ou really are running the risk of frying both your standard ecu and the ms2 if you don't even know how to use something as basic as a multimeter to verify / check your wiring.

Can I assume you used those god awful scotch lock / vampire connectors to tee into the existing wiring?

Offline Pure_Sincerity

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Re: Urgent help.
« Reply #24 on: Feb 23, 2013, 09:46AM »
No offense aaron, credit where credit is due for giving it a go, but I strongly recommend that you get an auto elec to check your wiring.

ou really are running the risk of frying both your standard ecu and the ms2 if you don't even know how to use something as basic as a multimeter to verify / check your wiring.

Can I assume you used those god awful scotch lock / vampire connectors to tee into the existing wiring?

All my wiring so far is exactly where it should be, o2, injectors, coolant temp, air temp, dizzy, tps, etc. ive spoken to Matt Cramer and they are where they should be, and the old man has checked over all that so far and everything's in the right place, he has years experience with wiring etc, but hes obviously not an auto electrician.

To tee the Lines in, I had used crimps just like factory wiring

But also, what's a scotch lock/vampire connectors ? Are they the things that you twist together via a screw driver to bind the wires ? Yeah they suck.
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Offline noss

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Re: Urgent help.
« Reply #25 on: Feb 23, 2013, 11:27AM »
no its one of those things with like a blade in it, you put the wire through and you lock the plastic over the blade piece which pierces the insulation and makes contact with the wire.


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Offline chr1S

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Re: Urgent help.
« Reply #26 on: Feb 23, 2013, 11:39AM »
I prefer scotch locks over soldered splices!!!!!

Fuck solder.
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Offline Pure_Sincerity

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Re: Urgent help.
« Reply #27 on: Feb 23, 2013, 01:21PM »
That red and black wire for pin e1 is only the power source for the injectors isn't it ?
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Offline SSS

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Re: Urgent help.
« Reply #28 on: Feb 23, 2013, 02:02PM »
pin e1 is the signal wire to the engine control relay.

Offline SSS

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Re: Urgent help.
« Reply #29 on: Feb 23, 2013, 02:04PM »
I prefer scotch locks over soldered splices!!!!!

Fuck solder.

are you serious mate? scotch locks are the fucking devil and should never be used anywhere, let alone near a car!!!!