Check Eng Light , No codes

Planenut43035 · #1 09-05-2007, 10:14 PM

2001 jimmy,2dr 4.3 auto 4wd, Hey my check engine light is on, but when i take it to auto zone it won't power up there code reader?!#@%$?
What gives?

taillight · #2 09-06-2007, 08:48 AM

The computer is noe sending out information. Could just be a bad connection with the ALDL or it could be a bad computer.

MT-2500 · #3 09-06-2007, 10:00 AM

Check fo 12 volt power and ground on ALDA test plug.
MT

Planenut43035 · #4 09-06-2007, 06:19 PM

Quote:

Originally Posted by MT-2500

Check fo 12 volt power and ground on ALDA test plug.
MT

Anywhere special on the plug? And can i hurt the comp by looking for a ground?

old_master · #5 09-06-2007, 06:52 PM

Did you check all of the fuses in both fuse panels with a test light?

MT-2500 · #6 09-06-2007, 07:37 PM

Quote:

Originally Posted by Planenut43035

Anywhere special on the plug? And can i hurt the comp by looking for a ground?

As Old Master said check all fuses and check for 12 volts on both sides.
Pin 4 is ground.
Pin 16 is battery power.
http://www.troublecodes.net/OBD2/

Planenut43035 · #7 09-06-2007, 09:53 PM

yep i did