1998 Chevy Cavalier 1998 cavalier communication problem

1998 CHEVROLET CAVALIER
Avatar
HEAVENLY DEMONIC
  • MEMBER
  • 2 POSTS
Electrical problem
1998 Chevy Cavalier 4 cyl Front Wheel Drive Manual

98 cavalier...In Oregon you have to take your car through DEQ for inspection. When I took my cavalier through to renew the tags, it won't talk to their OBD tool they plug in. So I can't pass. Yes the check engine light is on, and I have had problems with the wiring. The heater blower and radiator fan needed to be rewired. Do I need to just say screw it and get a new wiring harness? Or could this be a simpler problem that I can fix on my own. Need to get the car to talk to the OBD tool so I can get new tags. Other then the PCM not talking to the scan tool, the car runs fine. Checked all the fuses both on the side of the dash and under the hood, all good.
Apr 29, 2010 at 2:24 PM
Advertisement
Avatar
INTERNETMECHANIC
  • CERTIFIED EXPERT
  • 700 POSTS
I usually start by checking voltage and ground at the data link connector, if you can't communicate. Pin 16 is voltage, hot all the time. Pins 4 and 5 are grounds. Voltage for pin 16 comes from cigar liter fuse, not only check the fuse, use a voltage tester on the fuse circuit, should be hot all the time.


https://www.2carpros.com/forum/automotive_pictures/512072_cavalier_datalink_connector_1.jpg

Apr 29, 2010 at 4:08 PM
Avatar
HEAVENLY DEMONIC
  • MEMBER
  • 2 POSTS
Thanks, I will check that out.
Apr 29, 2010 at 7:34 PM
Advertisement