DIY Modify CarProg Bad A9 A1 A1+ adapters

Which adapter is necessary to make a test when the Carprog full fails to work? And how to do the test? Go on reading the post to get answers yourself.

 

A9 first!!!

carprog-a9-adapter

If CarProg hardware test fail – in most cases you just need exchange 4x 74HC125 integrated circuit. Exchange all 4 74HC125 together!!!

 carprog-74hc125-chipcarprog-74hc125-chip-1

carprog-74hc125-chip-2

carprog-pcb-74hc125-chip-1
update your Carprog A1 adapter:

carprog-a1-adapter

open A1 solder additional tantalum or electrolytic capasitors – this MOD will solve “communication lost” problems.
– A1 before modification:

carprog-a1-adapter-bad

– A1 after modification:

carprog-a1-adapter-good

or with electrolytic capasitors 47uF 25V

carprog-47uf-25v-electrolytic-capacitors

carprog-a1-with-47uf-25v-electrolytic-capacitors

update your A1+ adapter: 

open A1+ solder additional tantalum or electrolytic capacitors – more stable OBDII communication.  Also very important for older CarProg users – change one 1k Ohm resistor and solder 120R Ohm

 

– A1+Before modification:

carprog-a1-adapter-bad

– A1+ after modification:

carprog-a1-adapter-good
or with electrolytic capacitors

carprog-a1-with-47uf-25v-electrolytic-capacitors

TRY AT YOUR OWN RISK.

Carprog V8.21 full online version

 

http://blog.obd365.com/2016/09/13/test-carprog-with-a9-a1-adapters/

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About eobd21

I am a car lover and like to repair car by myself, and know more info about car diagnostic tool and other obd2 tools, share these info with everyone.
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