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Cant communicate

Tiny
MCAVOYSR
  • MEMBER
  • 1997 BMW 740
Computer problem V8 Two Wheel Drive Automatic 97500 miles

My scanner is unable to communicate with the vehicle either though the OBD or the under hood BMW connector, 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 10:28 AM

2 Replies

Tiny
RICHARD61
  • MEMBER
  • 1 POST
The 20 pin cap is on and tight check the fuses in the engine compartment and in the trunk they were good.
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Wednesday, September 13th, 2017 AT 5:40 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
It sounds like you still may have a fuse out here is a guide and a wiring diagram of the connector so we can do some testing and get the problem fixed.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Please let us know what you find.

Cheers, Ken
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Thursday, September 14th, 2017 AT 4:19 PM

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