scanner won't communicate with car - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Chevrolet When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-26-2014, 04:53 PM   #1
Senior Member

True Car Nut
Thread Starter
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default scanner won't communicate with car

A friend of mine has a 2002 Monte Carlo with the 3.8, and when he took it in for e-testing it failed because the diagnostic equipment (hooked up to the OBD port) could not communicate with the car. Has anyone else experienced this and have an idea what the problem could be?
2kg4u is offline   Reply With Quote
Old 02-26-2014, 04:56 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

If it "obviously" worked on another car, typical cig lighter fuse is probably blown. Check fuse, then check for BAT+12 at PIN 16 using chassis ground at PIN 4. This is usually the culprit.
Mike is offline   Reply With Quote
Old 02-26-2014, 05:00 PM   #3
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Oops...
Attached Thumbnails
scanner won't communicate with car-odbii%2520master%2520pinout.jpg  
Mike is offline   Reply With Quote
Old 02-26-2014, 05:46 PM   #4
Senior Member

True Car Nut
Thread Starter
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by Mike1995 View Post
If it "obviously" worked on another car, typical cig lighter fuse is probably blown. Check fuse, then check for BAT+12 at PIN 16 using chassis ground at PIN 4. This is usually the culprit.

It is the original PCM in the vehicle. The ADL has power (it powers up a scanner) but the scanner won't connect with the PCM.
2kg4u is offline   Reply With Quote
Old 02-26-2014, 05:49 PM   #5
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Make sure the OBD2 pins aren't pushed into the socket or bent. Next is to BEEP out OBD pin to PCM pin. Unless you have another scanner you can double check its functionality.
Mike is offline   Reply With Quote
Old 02-26-2014, 05:54 PM   #6
Senior Member

True Car Nut
Thread Starter
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Quote:
Originally Posted by Mike1995 View Post
Make sure the OBD2 pins aren't pushed into the socket or bent. Next is to BEEP out OBD pin to PCM pin. Unless you have another scanner you can double check its functionality.
He had the problem at the garage when he took it in for e-test, and I checked it with my Actron scanner. Same result.

Explain "BEEP out OBD pin to PCM pin".

I will check the pins.
2kg4u is offline   Reply With Quote
Old 02-26-2014, 05:58 PM   #7
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Using the continuity test function of your DVOM, your verifying the connection between the OBD port pins and the pins at the PCM. Or at least the wire right at the PCM connector(back probe into the wire insulation)

Or in other words, the BEEP test. If your DVOM supports BEEPING.
Mike is offline   Reply With Quote
Old 02-27-2014, 07:48 AM   #8
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

Attached Thumbnails
scanner won't communicate with car-02monteinpdata_zpsbcef4748.png  
jwfirebird is offline   Reply With Quote
The Following User Says Thank You to jwfirebird For This Useful Post:
Mike (02-27-2014)
Old 02-27-2014, 08:08 PM   #9
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

HUH! So they stopped using the cig lighter fuse. Now its the cluster/BCM fuse.
Mike is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Car just won't start-and windows won't roll down??? Jeff Jacobs 1992-1999 4 10-10-2017 06:42 AM
Hot deal on car scanner deuce228 General GM Chat 7 12-15-2007 04:20 AM
Help!! 95 SE Won't Upshift at WOT-Now Won't Run-Fixed!!! 95BlkBonnieSE 1992-1999 13 04-06-2005 06:27 PM
I won! I WON...with 1 second left Jim W Lounge 32 07-02-2004 08:14 PM
How Do I Create My Scanner Light Turn Signal????? DJGOODYB31682 1992-1999 4 10-22-2002 12:47 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:50 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.