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#1
10-07-2002, 09:29 PM
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On Board Diagnostic Tests
With the engine running on my '99 740iL, if the trip button and the fault code display button are both held simultaneously, the computer goes into a diagnostic test mode and the display reads Test . . .
Does anyone have the details on what is going on and the usefulness of these tests? 
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#2
10-08-2002, 05:59 AM
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OBD Codes
EMail me at [email protected] and I will send you the Code Book and How To on the hidden codes.
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