MA - Code Scanner

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sparg93

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My airbag light is currently on and unfortunately my scanner is only for engine codes...anyone in the MA/CT/NJ/NY area have a more comprehensive scanner?

I travel a bit between these states and would be grateful if I could hook my rig up to it for a few minutes.
 

SunlitComet

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can autozone or other part store scanner pull them?

---------- Post added at 01:17 PM ---------- Previous post was at 01:14 PM ----------

for **** and wiggles shut down the ignition and clean you front sensors too.
 
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sparg93

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can autozone or other part store scanner pull them?

---------- Post added at 01:17 PM ---------- Previous post was at 01:14 PM ----------

for **** and wiggles shut down the ignition and clean you front sensors too.

I was told AutoZone is engine only...but I could always stop by and check for myself! Good idea on the cleaning...I should have some carb cleaner laying around and I can spray onto the contacts.

Thanks Sunlit! Where are you located these days??
 

SunlitComet

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It is safe to say if there is actual separate cleaners for each type of equipment, they have different needs.

I i moved again from indy to rockford, il in first of July and now about two weeks ago to here. unfortunately that leg issue got me pulled off the second day . i can return and they want me back but in better health so i am working on that now. staying out for at least this week and some of next is likely.

specific task is to open and remove equipment in the way inside and outside of wing of embrear 145's(looks like a 737) for a sheet metal crew to fix cracks in and reenforce the rear spar just behind and outboard of engine pylon mounts. after wards we put it back together. and it flys. if all goes well it is about 40-60 hours but with 3-4 man crew at any given time. about 150+ planes to do.
when it gets in the air carrier does it scheduled inspections and then supports us to tear it down.

first day was 5 hour training on the policies. told us to come back 8 that night . did not go home till 18 hrs later.

once we start the task we stay until its done. same on going back together. that takes even longer.
 
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sparg93

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sounds like good solid work! what happened to your leg (if you don't mind me asking)??
 

SunlitComet

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had what thought was that leg cramp issue since april in indy. looks to be some sort of nerve compression. think it was that damn futon couch frame in the house rental there. had red itchy bumps to at the same time. they dispersed after i moved.
 
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sparg93

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It is safe to say if there is actual separate cleaners for each type of equipment, they have different needs.

I forgot to mention this...isn't a MAF simply a charged electrical wire?? (you would know more then me about it's operation)
 

SunlitComet

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from wiki.

Hot wire sensor (MAF)

A hot wire mass airflow sensor determines the mass of air flowing into the engine’s air intake system. The theory of operation of the hot wire mass airflow sensor is similar to that of the hot wire anemometer (which determines air velocity). The General Motors division (GM) was the first car company to use the hot wire sensor.[citation needed] This is achieved by heating a wire with an electric current that is suspended in the engine’s air stream, like a toaster wire. The wire's electrical resistance increases as the wire’s temperature increases, which limits electrical current flowing through the circuit. When air flows past the wire, the wire cools, decreasing its resistance, which in turn allows more current to flow through the circuit. As more current flows, the wire’s temperature increases until the resistance reaches equilibrium again. The amount of current required to maintain the wire’s temperature is proportional to the mass of air flowing past the wire. The integrated electronic circuit converts the measurement of current into a voltage signal which is sent to the ECU.
If air density increases due to pressure increase or temperature drop, but the air volume remains constant, the denser air will remove more heat from the wire indicating a higher mass airflow. Unlike the vane meter's paddle sensing element, the hot wire responds directly to air density. This sensor's capabilities are well suited to support the gasoline combustion process which fundamentally responds to air mass, not air volume. (See stoichiometry.)
This sensor sometimes employs a mixture screw, but this screw is fully electronic and uses a variable resistor (potentiometer) instead of an air bypass screw. The screw needs more turns to achieve the desired results. A hot wire burn-off cleaning circuit is employed on some of these sensors. A burn-off relay applies a high current through the platinum hot wire after the vehicle is turned off for a second or so, thereby burning or vaporizing any contaminants that have stuck to the platinum hot wire element.
The hot film MAF sensor works somewhat similar to the hot wire MAF sensor, but instead it usually outputs a frequency signal. This sensor uses a hot film-grid instead of a hot wire. It is commonly found in late 80’s early 90’s fuel-injected vehicles. The output frequency is directly proportional to the amount of air entering the engine. So as air flow increases so does frequency. These sensors tend to cause intermittent problems due to internal electrical failures. The use of an oscilloscope is strongly recommended to check the output frequency of these sensors. Frequency distortion is also common when the sensor starts to fail. Many technicians in the field use a tap test with very conclusive results. Not all HFM systems output a frequency. In some cases, this sensor works by outputting a regular varying voltage signal.
Some of the benefits of a hot-wire MAF compared to the older style vane meter are:

  • responds very quickly to changes in air flow
  • low airflow restriction
  • smaller overall package
  • less sensitive to mounting location and orientation
  • no moving parts improve its durability
  • less expensive
  • separate temperature and pressure sensors are not required (to determine air mass)
There are some drawbacks:

  • dirt and oil can contaminate the hot-wire deteriorating its accuracy
  • installation requires a laminar flow across the hot-wire
 

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