Final request for MAF AMP wiring help

[Banshee]

I've searched the forum as best I can and can't work it out from the instructions that came with it either.

Does anyone with one of Ray's MAF AMP's have any pics or able to verbally advise me how to install it on my truck?

Otherwise, I'll put it back up for sale :doh

 

[elty001]

Thought we had this sussed:nenau:nenau
Just connect the Maf amp in line to the maf/ECU.
Can't remember the wire colours but sure it was the orange wire that was the one in question.

 

[Banshee]

Thought we had this sussed:nenau:nenau
Just connect the Maf amp in line to the maf/ECU.
Can't remember the wire colours but sure it was the orange wire that was the one in question.

Nah, I'm still struggling to figure out where the orange wire physically connects to as per Ray's PDF here;

http://www.nissan4x4ownersclub.com/forum/showpost.php?p=216258&postcount=17

I've already tapped into the blue and white wire on the MAF harness for the white wire :nenau it surely can't attach to the same wire???

 

[elty001]

from what i understand you cut the wire and join the maf amp inline.
Basicly you are fooling the ecu into thinking more air is entering the engine so the feed from the maf goes into the maf amp and the wire out of the maf amp goes to the ECU.

 

[Lazy-Ferret]

This is the connection diagram I did, so I could make mine able to be unplugged, and the wiring to be put back to how it was Pre-Maf Amp should I need to... It gives the connections and wire colours....

I don't think there is any way to make this any more simple, and if you can't follow these instructions, then I guess you will either need to find someone else to do it for you. or as you say, give up....

Please read these all the way through, and think about them... you can't just skim read them, every word is important!!!

There are 4 wires on the MAF Amp...

Red is the 12v supply needed for the MAF amp to work
Green is the Ground, again needed for the MAF amp to work
Orange in the Input to the MAF Amp (from the cars MAF)
White is the Output from the MAF Amp (to the cars ECU)

The idea is, that you take the signal from the MAF of the car, and pass it through the MAF amp, then once the MAF Amp has done it's magic, it sends it on to the cars ECU...

To do this, you have to cut the original signal wire (Blue/White) that runs between the cars MAF and the ECU, effectively inserting the MAF Amp into the circuit...

Conveniently, all the wires needed to run the MAF Amp are also on the cars MAF, so all the connections can be carried out there, saving you having to scrabble round to find supplys and earths..

On the cars MAF, there are 4 wires...
Yellow is the 12v supply
Green/Red is the Ground wire
Red/Blue is a 5v supply (We do not need to touch this wire!!!)
Blue/White is the signal wire from the cars MAF to the ECU

So to connect the MAF amp to the cars MAF you need to do the following...

Connect the 12v up by connecting the MAF Amps Red wire to the cars MAF Yellow wire. You only need to use something like a scotchlok to connect these wires in Parallel.

Next, connect the ground up by connecting the MAF Amps Green wire to the cars MAF Green/Red wire. You only need to use something like a scotchlok to connect these wires in Parallel.

Lastly, you need to connect the signal wire to be passed through the MAF Amp... To do this, you CUT the blue/white wire on the cars MAF...

Leave enough wire at the cars MAF side to be able to connect back to, so ideally about 50m from the MAF.

Now take the cut Blue/White wire that is still connected to the cars MAF Amp, and connect this to the Orange input wire on the MAF Amp...

Lastly, take the other end of the cut Blue/White wire, that is connected to the car ECU, and connect this wire to the White wire on the MAF Amp...

You then set the MAF Amp up as Ray has mentioned in the other threads...

 

[Banshee]

from what i understand you cut the wire and join the maf amp inline.
Basicly you are fooling the ecu into thinking more air is entering the engine so the feed from the maf goes into the maf amp and the wire out of the maf amp goes to the ECU.

I get what it does and how it works.

The bit i'm struggling to get to grips with is whether the Orange wire from the MAF AMP also connects to the same white and blue wire on the MAF plug that the White wire from the MAF AMP conncects to? :nenau

So I guess what I'm asking is, do the Orange and White wires from the AMP both connect to the single white and blue wire on the MAF?

I don't know how to simplify it anymore :nenau

 

[Fez_uk]

It was my understanding theres MAFs out there that only use 3 wires and others 4. Hitachi and Bosch.

 

[Lazy-Ferret]

It was my understanding theres MAFs out there that only use 3 wires and others 4. Hitachi and Bosch.

I think that Ray and Rick covered that when Rick tried it out in the first place as Rick used it on a Zexel system with no problems... The basic wiring is exactly the same, but I think the colours on the MAF wires might be different, and there is no 5volt wire.

Here is the link to Ricks wiring...

 

[elty001]

I get what it does and how it works.

The bit i'm struggling to get to grips with is whether the Orange wire from the MAF AMP also connects to the same white and blue wire on the MAF plug that the White wire from the MAF AMP conncects to? :nenau

So I guess what I'm asking is, do the Orange and White wires from the AMP both connect to the single white and blue wire on the MAF?

I don't know how to simplify it anymore :nenau

Basically cut the wire and join the maf amp into the curcuit:thumb2

 

[solarman216]

Here is the diagram, Rick

 

[solarman216]

Sorry it would not load Rick

 

[solarman216]

So cut output on pin 5 (BE/WE), from Maf connect to amp white, Orange amp output connect to BE/WE that goes back to ECU, simples Rick

 

[terranosaurusdoug]

The other wires from maf amp piggy back the original wires, the orange and white wires on maf amp are used to REPLACE the original white/blue wire!

 

[Goatmaster]

Can anyone tell be if wire 4 RD/BE is a constant +5v?
Also has anyone measured the voltage of wire 5 BE/WE coming out of the MAF at say 1500 revs and the corresponding voltage out of the amp?
I understand that most MAF amps work on a 10% voltage increase but could do with some verification.

 

[solarman216]

Can anyone tell be if wire 4 RD/BE is a constant +5v?
Also has anyone measured the voltage of wire 5 BE/WE coming out of the MAF at say 1500 revs and the corresponding voltage out of the amp?
I understand that most MAF amps work on a 10% voltage increase but could do with some verification.

RayF is your man for this, frade I have forgotten, Rick

 

[solarman216]

Also if you have a search through Ray's posts you will find a full explanation of the way the MAF works, Rick

 

[Goatmaster]

Cheers Rick, will do.

 

[rayf3262]

The original wiring diagram from June 2013! is here:
http://www.nissan4x4ownersclub.com/forum/attachment.php?attachmentid=3862&d=1372150406

 

[Goatmaster]

Thanks Ray, I think I have all the info required. Just now need to test the actual output of the amp before inserting into the car. That will have to be on a 4.2v battery as I intend to run off the 5v feed, so will apply a margin of error. Next step is finding my multimeter.
Although I see they are on offer in Lidl this Sunday onwards for £9.99!

 

[rayf3262]

Thanks Ray, I think I have all the info required. Just now need to test the actual output of the amp before inserting into the car. That will have to be on a 4.2v battery as I intend to run off the 5v feed, so will apply a margin of error. Next step is finding my multimeter.
Although I see they are on offer in Lidl this Sunday onwards for £9.99!

I its one of my MAF-AMPs then 5V is not required, the AMP derives it power from the +12V as shown in the diagram.
The output directly from the MAF sensor will be in the range of +1.2V ~ 4.8V, this is fed to the input of the MAF-AMP. The gain of the amplifier when set to unity should make the MAF-AMP output track the input.
In use you will need an initial gain of around X1.2 ish as a starting point.

Do remember that fitting this unit will only be noticeable up to around 2300 rpm, after that if correctly adjusted it should have very little effect.