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1997 Chevy Suburban doesn't communicate with scan tool

Tiny
LUKERP77040
  • MEMBER
  • 1997 CHEVROLET SUBURBAN
Electrical problem
1997 Chevy Suburban V8 Four Wheel Drive Automatic 145k miles

I cannot get my vehicle inspected because it will not communicate with any scan tool. I checked the fuses and believe it might be due to the plug in or faulty wires. Does anyone know what it might be or How can I trouble shoot it eficiently.
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Saturday, July 24th, 2010 AT 2:36 PM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Check pin 16 at datalink connector for voltage. Use a voltage tester. If no voltage check aux power fuse 25 amp. Test for voltage on the fuse circuit.


https://www.2carpros.com/forum/automotive_pictures/170934_suburban_data_link_connector_1.jpg

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Saturday, July 24th, 2010 AT 3:02 PM
Tiny
LUKERP77040
  • MEMBER
  • 15 POSTS
Thanks a bunch for your help. I put the voltage meter up to the pin 16 plug and did get unconsisant readings with each of the pin holes on the plug ranging from 9 volts to 4. I rechecked the fuse you mentioned and it is good but was unable to get a voltage reading off that fuse. Thanks again and any more suggestions will be greatly appreciated.
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Saturday, July 24th, 2010 AT 4:15 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Maybe I misunderstood your post, pin 16 is only one cavity?
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Saturday, July 24th, 2010 AT 4:23 PM

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