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Re: Won't retrieve Scanner Codes.
There should be 12 volts present at terminal 16 of the OBD II diagnostic connector, this is the lower row of terminals, last terminal on the right, this is the same no matter who makes the car on all 1996 OBD II systems, if no voltage is present check your fuse panel, most likely the fuse will be blown for the cigar lighter or the accessory 12 volt power point, not sure what it is called in your Audi. Hope this helps.
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what country? OBD2 varies by Country some not until 2007 year. or 2010 old post. but will answer or all N/American cars. or XL-7 first off the CEL must glow key on, if not the fuse is blown if the fuse is blown the SCAN tool will never ever communicate. a scan tool can be had for $7 , so is near free. cheaper that beer holder on dash. LOL you then key on, and the scan tool comes up. you can scan for DTCs stored, motor not running. id do that. then start car, and see lots of things. (and cell go out , if no errors) here is a review. of some steps, tests, ways, means... i now use A wifi and bluetooth tool, but is only convenience.
First you need to retrieve the trouble codes stored in the computer.If you don't have a code reader or scan tool you can take it to your local autoparts store (advance auto,autozone,ect) and they can retrieve them for you.Then we can go from there.
start with scanning your system with CONSULT2. unfortunatelly this tool is only available at your friendly nissan dealer. generic scanners are not capable of retreiving codes from trans modules/components unless you have a more expensive scanner such as SNAP ON SOLUS or something similar. small scanner for $50 bucks from auto parts store usually doesnt read trans codes. engine codes only. if your O/D loght is flashing that means transmission issue. could be the solenoid pack on the valve body other elecrical component or convertor failure. have it scanned for codes first. then let mr know ehat the number is for the code.
Check the fuses. you will have one for ecm, also check the cigarette lighter fuse. they some times the dlc in with that fuse. it is best to remove the fuse when checking, I have found that they loose contact and removing them fixes problems. Haynes manuals do have electrical for the computers.
You need to get a scanner that will read the supplemental the codes from the inflatable restraint module.Not all scan tools can do this.This is the only way to retrieve the codes.Hope this helps.Good luck.
You need to have a OBDII scanner reader. Most auto Parts store like Auto Zone or Parts Source will scan free of charge and will give you the recommended instructions to address the issues your car's ECM has detected. Good luck and hope this was good news for you and thank you for using Fixya.