Paul Wall
Q45 Enthusiast
Online
4177 posts
1993 Infiniti Q45 133,000 Miles
Ipswich MA
12-22-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 7:42 PM 2/25/2009 |
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What to you mean by "iat"?If you mean Intake Air Temperature (IAT) Sensor, there isn't one on 1990-1996 Q45's There is MAF AKA Mass Air Flow sensor You can try this ans see if it help: 
This is what the MAF sensor look like and we usually take the black cover circled in the white off to see id the MAF sensor is good or not: 
If you have a VOM AKA Volt, OHM meter you can try the below: 
But this is much easier with a laptop consult connector by Blazt or a real Consult which the dealership and specialty shops have. This is where the MAF sensor is located in the engine bay: 
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1993 Q45 Green 11/92 Hybrid of 1990 and 1994 Q45, Soon to be Nissan President
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 9:05 PM 2/25/2009 |
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What color are the wires and which one is ground and so on?
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Paul Wall
Q45 Enthusiast
Online
4177 posts
1993 Infiniti Q45 133,000 Miles
Ipswich MA
12-22-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 10:04 PM 2/25/2009 |
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Well I think the standard color of a ground is black. But you can find the wiring diagram in the FSM: http://www.nicoclub.com/FSM/Q45/1994_Q45/
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 12:08 PM 3/4/2009 |
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What was also weird was the fact when I opened the wire up, there was a black goop like substance in it. Anyone know what that is?
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Paul Wall
Q45 Enthusiast
Online
4177 posts
1993 Infiniti Q45 133,000 Miles
Ipswich MA
12-22-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 12:25 PM 3/4/2009 |
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Can you how us pictures or better describe it? Because all I can think of is the black RTV (Which is rubber).
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 8:41 PM 3/4/2009 |
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Well, there is the wire "sheath" or cover if you will. Then I opened it up to look at the wires and it was just black goo or something black and sticky in side. Before I opened it, the cover was never touched, cracked or opened. It looked like no-one ever messed with it.
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Raxephon
Offline
1910 posts
'04 RX8
Fl
7-27-2004
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 9:12 PM 3/4/2009 |
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Liquid electrical tape maybe?
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 4:57 PM 3/8/2009 |
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I don't understand the wiring diagrams. I'm not good at electrical. I can put a car stereo system together but that's about it!! LOL! Can you give me some more detail as to which wire is what and maybe what it does or if this is hot or now and so on!!
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Paul Wall
Q45 Enthusiast
Online
4177 posts
1993 Infiniti Q45 133,000 Miles
Ipswich MA
12-22-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 5:06 PM 3/8/2009 |
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I don't understand the problem your trying to solve.Do you think your MAF harness, connector or sensor is actually bad? What problems are you having.
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Q45tech
Q45 Guru
Offline
13721 posts
1990 Q45 323,000 miles 19.5 years ownership
Marietta , Georgia
4-30-2002
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 5:47 AM 3/9/2009 |
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90-95 VH45 don't have a separate IAT sensor infront of or inside MAF to provide a double check on MAF function. THe function of IAT is performed by ECU mathematically by viewing coolant temp, and AC on signal.After all the O2 sensors provide final trim at cruise and WOT is always SUPER RICH. Whether the intake air deviates from STANDARD 70F much..................... 130F [-6% density] or 10F [+6% density]. If WOT AF ratios is 11.00: 1 at 70F then 10.34 @ 10F and 11.66@ 130F* is inconsequential in acceleration.
* 130F probably means summer traffic and AC on signal and above 195F coolant stat decreasing ignition advance to protect engine so a IAT GUESS is almost as good as a sensor reading. Only OBDII requires multiple backup sensors for every function.
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (Q45tech) | 8:04 PM 3/10/2009 |
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Well, I don't really have a problem with the maf sensor. I was merely trying to hook something up through it and was trying to figure out the wiring.
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maxnix
NICO Supporter
Offline
38 posts
1995 Q45, 1995 Q45t, 2000 Q45
Austin TX
7-22-2002
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 8:25 PM 3/10/2009 |
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Oh, the 5% resistor to add 30 HP?  Doesn't work. 
Brian
1995 Q45 & Q45t & 2000 Q45
Discover the power of the button!
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (maxnix) | 2:27 PM 3/12/2009 |
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Act| Quote, originally posted by maxnix » | | Oh, the 5% resistor to add 30 HP? Doesn't work. |
Actually this one is or looks not to be a resistor. It is a box but I guess the same idea. I will give it a try anyway, so which wires would I hook up to? The white, black with stripe, or black? It hooks to 2 wires.
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Paul Wall
Q45 Enthusiast
Online
4177 posts
1993 Infiniti Q45 133,000 Miles
Ipswich MA
12-22-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 2:30 PM 3/12/2009 |
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Didn't it come with instructions?
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SleepinTXQ45
Offline
18 posts
1994 Infiniti Q45
San Antonio Texas
3-8-2009
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| « Re: 1993 mass air flow sensor wires? (Paul Wall) | 10:06 PM 3/14/2009 |
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black is ur ground
black/white is ur signal
white is ur 5v reference
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jasonhirt23
Offline
49 posts
1993 Q45
Tacoma Washington
2-16-2009
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| « Re: 1993 mass air flow sensor wires? (SleepinTXQ45) | 10:58 AM 3/15/2009 |
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| Quote, originally posted by SleepinTXQ45 » | black is ur ground
black/white is ur signal
white is ur 5v reference |
Thanks alot! I appreciate it. The instructions are a little vague but I think I can manage.
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SleepinTXQ45
Offline
18 posts
1994 Infiniti Q45
San Antonio Texas
3-8-2009
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 2:36 PM 3/15/2009 |
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Jason, i fed up.....
black/white is ur 5v ref
white is ur signalsorry for the problems
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Q45tech
Q45 Guru
Offline
13721 posts
1990 Q45 323,000 miles 19.5 years ownership
Marietta , Georgia
4-30-2002
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| « Re: 1993 mass air flow sensor wires? (SleepinTXQ45) | 3:02 PM 3/15/2009 |
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Since Q [90-95] doesn't have an IAT, kind of impossible to connect the dubious destructive box. Thank goodness.
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Kiven422
Offline
429 posts
93' Q45, 94 Q45t
Hayward CA
8-23-2007
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| « Re: 1993 mass air flow sensor wires? (jasonhirt23) | 1:53 PM 3/18/2009 |
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Hello Jason,I am having this exact same problem right now with my 1993 Q45. Must do myself to have it done right. Thanks for making the post.
93 Q45 Black
JDM V8 Swap. Ultimately the fastest.94 Q45t White
93 Factory Intake Mod, Magnaflow Dual-Exhaust (incl. high-flow cats, mufflers), Eibacks\Tokicos, JWFSTB, Active RSB... It seems I have more power now at 207k miles. The torque above 65mph is amazing.
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qsiguy
Offline
1879 posts
1994 Infiniti Q45 Turbo
Phoenix AZ
3-20-2005
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| « Re: 1993 mass air flow sensor wires? (SleepinTXQ45) | 11:32 PM 3/18/2009 |
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| Quote, originally posted by SleepinTXQ45 » | Jason, i fed up.....
black/white is ur 5v ref
white is ur signalsorry for the problems |
Third time's a charm... Black = ground
white = 0-5.12V output
Black/white = 12 volts This one doesn't use the 5 volt reference like some vehicles. it's 12 volts. More info...On the MAF the socket is labeled 'B' 'D' and 'E' B = white: 0-5.12V output
D = black: ground
E = black/white: 12 volt supply Oh, and Jason...don't bother with that resistor in a fancy box. Trust me and the others, that's all it is and it won't do anything but make your car run crappy or not at all.
1994 Infiniti Q45 Turbo
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