Microtech Wiring woes
05-23-08, 11:32 PM
#26
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Ok I got it. there is one wire from the loom connecting to the trailing plug. Then the wire that is loose (the one I am trying to figure out) is a wire coming from a splitter from the trailing plug. It was spliced in... So I'm ok, I'm sure then... It doesn't need to be connected to anything... Whoo hoo... I love this forum!!!
make sure its not for your other coil b4 you go cutting it off.... than you will have to rejoin it than you start getting messy that way !!!! keep ya joins a minimum looks alot neater that way
any ways great that we could help you out 
05-24-08, 09:56 PM
#27
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It is not for my other coil. The other coil is already connected and all. I didn't cut it off. I folded it and wrapped the end in electrical tape, just in case for umm well you never know.... LOL But I finished everything today. I got the wire for my fuel pump connected and I for the ground connected. I also wrapped all the wires in zip tie to make it look neater. All I need in the car is a battery and connect the positive. LOL Ohh and my hand controller is on the way... This week my car is gonna startup... Whoo hoo wish me luck
06-02-08, 04:07 PM
#31
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So to power the microtech does the car have to be on or just on Accessory cuz I just went to crank my car and there are no lights on the ECU that are turned on and the hand controller has no power... is there another way for me to get power directly to my ECU outside the car so I can put a tune on it... I am also thinking of re-wiring this damn harness... Can someone give me a guide to tell me what color goes to what plug from the microtech loom... I am going to take off the elec tape and look at all the connections...
06-02-08, 05:21 PM
#32
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So the relay connectors seem to be correctly wired... The only one that seems weird is the one that is supposed to go to the power to the battery. The wire is connected to pin 87 but I trced it back to the loom and it is also connected to a red wire, blue with red stripe wire and white wire... Is this right?
06-02-08, 06:26 PM
#33
i told you to rip apart that harness and redo it. the guy who did it originally is dodgy as.
To power up the microtech their are 3 wires that need to be connected.
RED, PINK and BROWN(their are a few brown wires, they all need to be connected to the one black wire that goes to earth).
RED is CONSTANT 12V
PINK is 12V IGNITION
BROWN(BLACK) is EARTH.
As for your relay.
blue/red is an input. so is the white wire.
so dont know what the hell is going on their.
thats not right.
To power up the microtech their are 3 wires that need to be connected.
RED, PINK and BROWN(their are a few brown wires, they all need to be connected to the one black wire that goes to earth).
RED is CONSTANT 12V
PINK is 12V IGNITION
BROWN(BLACK) is EARTH.
As for your relay.
blue/red is an input. so is the white wire.
so dont know what the hell is going on their.
thats not right.
06-02-08, 07:23 PM
#34
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Is there like a guide can follow to redo this harness. I'm not talking like wiring diagram cuz I don't get how to read wire diagrams, I'm talking about like write up cuz everything seems to be color coded afterall... So if there is a guide that tell me where each wire goes that would be great...
06-02-08, 11:30 PM
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Yes, there BADLY needs to be a How-to for the microtech. My friend had a bunch of trouble going by the schematic that came with the microtech. And I am thinking of getting one as well. A write up with pics of which wires go where would be grand.
06-03-08, 12:09 AM
#37
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Alright here is where I am right now... I unwrapped all the elec tape and looked at all the connections. Based on what was already written in this thread I have everything connected but 7 wires... They are all from the same loom as the injector plugs, they are as follows:
white
purple
black with red stripe
blue
grey
black (not the one that was used with the brown wires for ground)
Also my water temp is not wired in
My TPS is not wired in
How do I wire them in?
My injector plugs were wired like this to each injector:
red and yellow w/black stripe
red and orange w/black stripe
red and orange
red and yellow
Are these correct? If so which ones go to the primaries and which to the secondaries?
what wires go to what
Ohh and the CAS wiring would be great cuz I dont' know if that is wired correctly...
thanks in advance
white
purple
black with red stripe
blue
grey
black (not the one that was used with the brown wires for ground)
Also my water temp is not wired in
My TPS is not wired in
How do I wire them in?
My injector plugs were wired like this to each injector:
red and yellow w/black stripe
red and orange w/black stripe
red and orange
red and yellow
Are these correct? If so which ones go to the primaries and which to the secondaries?
what wires go to what
Ohh and the CAS wiring would be great cuz I dont' know if that is wired correctly...
thanks in advance
06-03-08, 01:18 AM
#38
ok white wire is your Aux_FAN out put wire. This connects via a relay to power your electric fan(if you have one) otherwise leave it disconnected.
Purple is your Water temp sensor wire and it is non polar, can go on any pin on the water temp sensor, this is usually bundled with a brown wire(earth) which you should have a few of, on a unfucked with microtech loom the brown wire coming from the microtech is split into a few brown wires and one black wire.
BLUE and GREY are both for the TPS and are bundled with a brown wire(earth).
im pretty sure you said you have a s4 so this is how the tps connects.(looking at tps).
blue=orange
grey=green/red
brown=black/red
Black with red stripe is your narrow band 02 sensor input which dosnt need to be connected.
Black wire is your air temp sensor wire, this is non polar so can go on either pin of the air temp sensor and is usually bundled with a brown earth wire(as explained for the water temp sensor).
THe bundling of wires for the injectors is correct. all injectors require 12v and the computer earths them via the different coloured wires. Important thing to note about injectors is that they are non polar but all injectors must be wired in the exact same fashion. So if you have one injector with PIN A as + and PIN B as- then all injectors must follow this pattern
now
red and yellow w/black stripe = Primary Rear Rotor
red and orange w/black stripe = Secondary Rear Rotor
red and orange = Secondary Front Rotor
red and yellow = Primary Front rotor.
hope that answers all questions. anymore let me know.
Purple is your Water temp sensor wire and it is non polar, can go on any pin on the water temp sensor, this is usually bundled with a brown wire(earth) which you should have a few of, on a unfucked with microtech loom the brown wire coming from the microtech is split into a few brown wires and one black wire.
BLUE and GREY are both for the TPS and are bundled with a brown wire(earth).
im pretty sure you said you have a s4 so this is how the tps connects.(looking at tps).
blue=orange
grey=green/red
brown=black/red
Black with red stripe is your narrow band 02 sensor input which dosnt need to be connected.
Black wire is your air temp sensor wire, this is non polar so can go on either pin of the air temp sensor and is usually bundled with a brown earth wire(as explained for the water temp sensor).
THe bundling of wires for the injectors is correct. all injectors require 12v and the computer earths them via the different coloured wires. Important thing to note about injectors is that they are non polar but all injectors must be wired in the exact same fashion. So if you have one injector with PIN A as + and PIN B as- then all injectors must follow this pattern
now
red and yellow w/black stripe = Primary Rear Rotor
red and orange w/black stripe = Secondary Rear Rotor
red and orange = Secondary Front Rotor
red and yellow = Primary Front rotor.
hope that answers all questions. anymore let me know.
06-03-08, 08:34 PM
#43
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Ohh man I don't know aht is wrong I followed everything down to a "t" and I'm not getting power... I don't know y? Could this microtech be bad? Ohh god I hope not, is there a way for me to find out? I am getting desperate here...
Last edited by asiandude15; 06-03-08 at 08:57 PM.
06-03-08, 10:02 PM
#44
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Alright startling revelation, the car Cranks, I know the starter works. LOL anyways I connected the positive to 87a on the relay and the fuel pump turned on, so at least I know it works... But no lights are coming on my microtech. I wired wrong I know... the 12v thing is what I am thinking... The pink wire, But the pink wire is connected to the relay on pin 86 and the other is connected bridged to my coils as you said... Is this right? But I have nothing wired to my ignition switch, there is nothing to switch on the power. How do I fix this? I am a complete failure. LOL I can't believe I missed this....
Last edited by asiandude15; 06-03-08 at 10:18 PM.
06-04-08, 11:06 AM
#46
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I know I had the positive on 87 not 87a, I just checked to see if my pump was working... I just put a new main fuse 80a and new other fuses as well. Which one do I need to check specifically? So the pink wire splits into two, one is connected to pin 86 on the relay and the other is connected to the plugs that go to my coils... My problem is that when I switch on the car, the fuel pump doesn't come on and I'm getting no power to my microtech. So something has to be connected wrong on my relay... I think I did screw up cuz I was looking at this...
My coil packs have to be sourcing a healthy 12v from elsewhere so, I have not messed with the factory wiring on the battery harness. Where are the tan wires? Pink has to go to go to 12 ignition, so ignition barrel.. How do I do this? But I already have both pink wires connected as in the instructions... I'm confused again... I almost got this it is this one thing I screwed up on I'm sure of it...
This is what i was trying to tell you in pm. What you have said above is totally wrong.
Pink is unrelated to coil packs.
Pink has to go 12v ignition, so ignition barrel etc.
It can go to coil packs but only if they are sourcing a healthy 12v signal from elsewere.
Next.
Their should be two trigger wires going to the trailing coil pack, and one trigger wire going to the leading coil pack.
So from the microtech. Their is a grey/blue wire that will go to the leading coil packs.
And on the trailing their are two wires which are grey/red and grey/black.
These are the - triggers
FOR THE LEADING COIL PACK
Their is a pink wire on the IGNITOR side that needs to connect to the grey/blue wire.
Their is a tan wire that goes to 12v ignition and can be connected to the factory coilpack 12v ignition.
FOR THE TRAILING COIL PACK
The pink wire on the IGNITOR side goes to grey/red and the white wire goes to grey/black.
THEIR are 2 wires on the trailing ignitor and they are both tan. They both need to be connected to 12v ignition and the factory ignition feed is fine.
Hope this makes things clearer for the ignition side of things.
Pink is unrelated to coil packs.
Pink has to go 12v ignition, so ignition barrel etc.
It can go to coil packs but only if they are sourcing a healthy 12v signal from elsewere.
Next.
Their should be two trigger wires going to the trailing coil pack, and one trigger wire going to the leading coil pack.
So from the microtech. Their is a grey/blue wire that will go to the leading coil packs.
And on the trailing their are two wires which are grey/red and grey/black.
These are the - triggers
FOR THE LEADING COIL PACK
Their is a pink wire on the IGNITOR side that needs to connect to the grey/blue wire.
Their is a tan wire that goes to 12v ignition and can be connected to the factory coilpack 12v ignition.
FOR THE TRAILING COIL PACK
The pink wire on the IGNITOR side goes to grey/red and the white wire goes to grey/black.
THEIR are 2 wires on the trailing ignitor and they are both tan. They both need to be connected to 12v ignition and the factory ignition feed is fine.
Hope this makes things clearer for the ignition side of things.
Last edited by asiandude15; 06-04-08 at 11:12 AM.
06-04-08, 06:11 PM
#47
the relay isnt going to be the reason your computer isnt switching on and your fuel pump is NOT going to switch on if your computer dosnt switch on.
So put the power wire back to 87 and lets get the computer to work.
So their are 3 things that the computer requires to work.
Power
IGNITION TRIGGER
EARTH.
CHECK that their is 12v all the time on the RED wire
Check that their is 12v on ignition at the pink wire
Check using a continuity test on a multimeter that you have an earth on the brown wire.
DO this all from the microtech plug that goes into the microtech itself.
One of those is going to be not working, then we can say whats not letting your computer switch on.
So put the power wire back to 87 and lets get the computer to work.
So their are 3 things that the computer requires to work.
Power
IGNITION TRIGGER
EARTH.
CHECK that their is 12v all the time on the RED wire
Check that their is 12v on ignition at the pink wire
Check using a continuity test on a multimeter that you have an earth on the brown wire.
DO this all from the microtech plug that goes into the microtech itself.
One of those is going to be not working, then we can say whats not letting your computer switch on.
06-04-08, 06:34 PM
#48
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ignition trigger is my problem I think. Where does my pink wire need to be connected to? From the loom it splits into two and then one goes to the relay and the other should go where exactly?
Last edited by asiandude15; 06-04-08 at 06:41 PM.
06-04-08, 06:55 PM
#49
It has to an ignition source.
SO if your so sure that your coil packs are getting a healthy 12v on ignition then your computer will get it.
Dont make any assumptions or will be going round in circles for ever.
Conduct the tests above.
It will make us know what were doing with no doubt.
Also go to your coil packs and check that is actually 12v their on ignition.
SO if your so sure that your coil packs are getting a healthy 12v on ignition then your computer will get it.
Dont make any assumptions or will be going round in circles for ever.
Conduct the tests above.
It will make us know what were doing with no doubt.
Also go to your coil packs and check that is actually 12v their on ignition.