As mentioned to other members, my database goes up only to 2007 and some 2008 models, but if your Fusion is like the 2007 Ford Fusion, then the configurations is below. Just make sure that wire colors match. If they do, then it applies to the 2009 model too. First of all, it must be 6 wires in the MAF, as follows:

1. VIOLET/GRAY – IAT
2. YELLOW/VIOLET – Control signal return
3. BLUE/GRAY – MAF signal
4. VIOLET/BROWN – MAF signal return
5. BLACK/GREEN – Ground (-)
6. either VIOLET or VIOLET/GRAY – Power (+)

All these thermistors used as IAT sensor have similar properties, ranging in cold temperatures from 3,300 ohms (3.3K) to 10,000 ohms (10K), so start from the lowest to the highest value for your experiment. Values between those limits are also good to try, maybe by the use of a 10K variable resistor (potentiometer) in series with a 3.3K resistor, so the output value keeps between 3.3K and 13.3K.

Regards,

Richard

It depends on the system on board of your Honda, but most cars use the MAF for calculating how much fuel will be injected in normal driving situations, as to keep the mixture near to 14.7:1 as much as possible and the only way to precisely do that is by knowing how much air by mass (not by volume, as volume is not as precise) is entering the engine.

Not knowing how much air is incoming, you really have no way of knowing how much fuel to deliver. Speed density, which is the mode you described, use RPMs (engine speed) and if possible, manifold absolute pressure (MAP sensor) to inject fuel by some preset parameters, like fuel and ignition maps. It is most used in compensating for acceleration (WOT tables), but will switch off when cruising. This can only be overridden by programming, by someone who knows what he or she is doing.

In general, no matter what the physics laws apply here, the truth is that by default, the ECM computer will cut acceleration as it is doing right now when you disconnect the MAF, because it is detecting a malfunction caused by the absence of the sensor.

“What are the implications of running w/o a MAF?”

If the ECU would not be detecting the malfunction, implications would be the same implications for running too lean or too rich, usually (and fortunately), too rich. You know, lots of black smoke and harmful emissions.

Regards,

Richard

For the Pathfinder of that year, I can only see a 5 wires assembly MAF, where two of them are power (+12v), one is the IAT, one is the MAF signal itself and the other one is sensor power (+5v).

The configuration is as follows (it’s made of 5 wires, but somehow it starts with #2 in the diagram):

2. BLACK/WHITE – Sensor Power
3. BLACK/PINK – Ground (-)
4. Orange – MAF Signal QA+
5. BLACK/PINK – IAT Signal
6. BLACK/PINK – Ground (-)

Make sure you do not confuse wires, as there are three of them with the same color “BLACK/PINK”.

Regards,

Richard

I am sorry, I would love to help you, but diesel models are not listed in my database. It is for USA models and diesel engine passenger or family cars are very rare in this market.

Regards,

Richard

Here I am. Work load is been huge lately, making it a little bit difficult to reply to requests on time and when I finally have the time, I regret that in your case I have bad news. I can look up to 2007 models and some from 2008. I have not updated the database and Camaro is not in the list on 2007/2008. I was trying to look for a possible similar setup, but no luck so far.

I am sorry I couldn’t help.

Richard

I am curious. I have a 2008 Civic EX. The IAT and MAF are integrated. What would happen if I disconnected them and applied resistors to the IAT, but left the MAF UNPLUGGED. I found that I can drive without the IAT/MAF plugged in, however, the ECU limits my RPM’s and I’m guessing its defaulting to a lean mixture.

What are the implications of running w/o a MAF? I thought I read somewhere that the ECU will look to other factors like speed and rpm to measure mixture with the MAF is unplugged or failed.

I have a 2004 Pathfinder V6 with a 3 wire MAF could you confirm that the D conector and black wire is the signal wire.

Great job with all the helpfull info here!!

Cheers
Fred

I have an Ford Kuga SUV with an 140 HP Diesel engine..
I have 4 Wires at the IAT sensor, but I don´t know which is the right one..
Please help..

Best regards Oliver

The MAF sensor in the 2004 Nissan Pathfinder with 3.5L engine,
has 5 wires and includes an internal IAT sensor. It has the
following configuration:

2. BLACK/WHITE (B+)
3. BLACK/PINK (Gnd)
4. ORANGE (MAF)
5. BLACK/PINK (IAT)
6. BLACK/PINK (Gnd)

Wire #1 is either cut, not present or not documented, making it
5 wires in total.

Wire #5 above is the IAT. Make sure you use the right wire, as there
are three wires with the same color (BLACK/PINK) and two of them are
grounded.

Best regards,

Richard

I am sorry. I do not have the information of the G37, but I guess it is the same as in other Nissan/Infiniti. Can you tell me the colors of the 5 wires in order (any order, left to right or right to left)?