1997 BMW 740 NO POWER TO OBD CONNECTOR

  • Tiny
  • McAvoysr
  • 1997 BMW 740

Computer problem
1997 BMW 740 V8 Two Wheel Drive Automatic 97500 miles

My scanner is unable to communicate with the vehicle either throught the OBD or the unerhood BMW connector

Tuesday, August 19th, 2008 AT 10:28 AM

3 Answers

  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,713 posts

What scanner are you using?

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Tuesday, August 19th, 2008 AT 2:25 PM
  • Tiny
  • McAvoysr
  • Member

I have a snap on Solus. This scanner work with other BMW's (1999 740il, 2001 540i, 1998 328). It powers up, but when prompted to scan for codes it tries for a few seconds and then says unable to communicate, make sure key is on.

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Tuesday, August 19th, 2008 AT 2:35 PM
  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,713 posts

The OBDII information does not come out of the OBDII plug if the cap for the 20 pin under hood diagnostic connector is gone or off. Reinstall the cap and try it again.

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Tuesday, August 19th, 2008 AT 6:47 PM

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