How to read obd codes on 1995 bmw 525i?

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Patryk

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My friend has a 95 BMW 525i and the "check engine" light is on. I have found the manual online and it says on page 49 that it is possible to read the codes without a scan tool, simply by pressing the accelerator (all the way to the floor) five (5) times within five (5) seconds. After pushing the accelerator the "check engine" light is suppossed to flash the code(s) detected by the computer.Does anyone know if this procedure works. My friend tried it and nothing happened. Thanks. Below is the link to the woner's manual (PDF) file.

http://luuk.xs4all.nl/bmwboeken/Bentley_BMW_5-Series_Service_Manual.pdf
 
The site I use says the same thing but you have to have the car key in the run position, without the car running.

http://www.extreme-check-engine-light-codes.com/BMW%20OBD1%20Decoder.htm
 
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