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Air Bag Tool
By
Scott MDT
Today we are going to build a tool to check and clear air bag codes.
The tool will cost approx. $5 to make.
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Parts Needed:
- medicine bottle or (film canister can
be used)
- Radio Shack switch no. 275-1549A (this
is a momentary switch)
- Radio Shack LED no. 276-270A (any color
can be used)
- 4 wires 1' in length RED, YELLOW ,BLACK
, GREEN (I got mine out of an old harness that has male
tips on the wires for easier use and longer life)
- 1 small zip tie
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Tools Needed:
- sodier iron
- soder
- flux (for easier sodiering)
- wire stripper
- pliers
- drill bits (13/64 and 15/64)
- small rat tail file
- razor blade
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- First picture is of the parts needed, and second is of the tools
needed. Take the cap off the medicine bottle and pull the insert
out. Take the razor and cut the center out of the insert. Next
reinstall the outer ring back in the cap but upside down. This
will make the cap click on and be a tighter fit. Be careful not
to cut off too much.
Picture 3.
- Next take the 15/64 and 13/64 drill bits and drill a hole in
the cap on
each end making the 15/64 fairly close to center. Pic 3 shows
the cap w/
holes already in it. You will have to trim the support ridge out
of the
bottom of the cap to make room for the nuts to lock down. Take
the 15/64
drill bit and drill a hole in the bottom of the bottle to pull
the wires
through later.
- Now take the LED and cut half the length off the wires and then
strip the
ends to have it ready to solder. Take the 4 wires and strip the
ends approx.
1/4" lay the switch on the table with the writing side up.
The switch is
labeled 1,2,3 (NC COM NO)respectively.
Assembly:
- Install the LED and switch in the cap.
- Pull the YELLOW wire out and sodier it to the RED wire ON the
LED.
- Next solder the black wire on post #1 (left post).
- Soider the GREEN wire on the #2 post (center post).
- And last sodier the RED wire and the black wire from the LED
on the #3 post.
 
Pictures 5 & 6.
- MAKE SURE that the sodier and wires don't touch each other.
THAT WOULD BE BAD! Pics 5 and 6 are of the front and side view
of the assembled wiring.
 
- Now slide the wires into the bottle and lock the cap. Pic 7
& 8 are of the
assembled tool. Take a minute and write the wiring order down
and tape it to
the bottle.
AB---RED
E1---GREEN
TC---Black
+B---Yellow
How to use my new tool >:)
- Go to the diagnosis box under the hood and open the top. Inside
the lid you
will find the terminals marked accordingly.
- Turn the key on and put the RED wire in the port marked AB.
Put the GREEN in the one marked E1, and so on, and so on.
- When you plug in the last one the led in the cap will flash
out the code
that is in memory.
- Once fixed hook up the tool and turn the key on press the button
on the
tool 3 times at 1 second intervuls. The light on the cap should
flash
steady. This means the code is cleared.
Have fun and enjoy your new tool!!!
-Scott MDT
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