Scanners wont work on cars that old. What do I do.
Reading trouble codes is through a three cavity ALDL connector located behind a kick panel on the passenger side of vehicle. The ECM has a battery voltage line to the connector. Using a jumper wire, this line is connected to the ground. The ECM will then toggle "Check Engine" light to emit any trouble codes stored in the ECM. If no codes exist, the ECM will flash code 12. If codes exist lowest number will flash first. Each code will flash 3 times. Good Luck
That is true.
but some cars running obd1 , can be scanned,. (i have one)
like all GM cars and even older, , some ford, , Honda's . Toyota;s
but this car is GEO, (underdog, but is really what. a Isusu.)
Isuzu's cars are mostly not raced or sold here now. so who's going to make scanner for such a rare car and engine and EFI?
there is no OBD1 standard, each company uses a unique design.
then,... so...
OBD2, in 1996 a USA invention is a standard and all tools work.
so....
what you have is the old blink codes. wink wink...
all OBD1 cars work like this (or very close)
you connect a jumper wire, and the CEL lamp flashes codes.
so is the CEL stuck on? running.
must come on key on, bad lamp or bad ECU.
you can check out Isuzu Impulse
Example storm post..OBD1991 (USA)
To put the ECM (Engine Control Module/Ignition Control Module/Engine Computer) into diagnostic mode, where it will flash codes at you using the "MIL" (Malfunction Indicator Light or "Check Engine" light), short pins 1 and 3 of the ALDL/OBD1 connector using a paperclip. When you then turn the key into the on position, the MIL should flash once, then pause a bit, then flash twice. That means code "12." If there are other codes, they will be flashed out as well. All codes are two digits.
end quote, on storm
but where is the connector DLC?
and which pin is 1 an 3
so. we google more, or look it up in alldata.com like most do.
or here
http://www.robietherobot.com/storm/stormFAQ.htm
that was the 1st google hit, using clear text human questions.
DLC jumper storm or Impulse.
or diagnostic jumper Impulse.
join a Geo storm or inpulse forum and ask for scan tools.
they will be custom tools. (or hacked, as i have done)
ALLDATA OEM Auto Repair Information for Professionals
The leading provider of original...
SOURCE: how to set the timeing on 91 geo storm
The timing marks are located near the top of the crankshaft pulley on the plastic timing belt cover. There is a notch in the pulley to mark TDC (Top Dead Center)
Align the notch with the 0 mark on the plastic cover to set your base timing.
Ground the proper circuit on the ALDL connecter located under the dashboard somewhere under the steering wheel. Check the manual for the proper circuit to ground.
With the engine warm and the circuit grounded. Set the proper timing. Un-ground the circuit and you are done.
SOURCE: how to change fuel filter on a 91 geo storm gsi
the fuel filter is direclty below the brake booster mounted on the left side fender when your facing the car from front but be careful as to not twist and break the metal hoses on the fittings on the filter
SOURCE: OBD 2 location
does not have this obd 2 ,anything before 1994 does not have this ,u have a ald conector unde steering colum a code key will flash codes for repair
SOURCE: Infl light flashes. car won't start. Just bought car.
mine does the same thing! did you find a solution? it would crank but not start, fixes itself if you let sit for an hour or so
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