OBD II Connector

FRANMOSSO

MEMBER
2006 CHEVROLET COBALT
4 CYL
2WD
AUTOMATIC
97,000 MILES

II have a check engine light on and I hooked up my scanner to read the error code. The problem is the scanner does not power up so I checked between pins 16 (+V) and pin 4 (GND) and got no voltage reading on the vehicle connector. I tried the scanner in another vehicle and it works. Does anyone know where the voltage originates from?
Thanks

8 Replies

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Hello,

Check your fuses. Here is a guide to help and the fuse location in the diagrams below.

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

Check out the diagrams (Below). Please let us know what you find.

.

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Tuesday, May 19th, 2009 AT 8:49 AM

FRANMOSSO

MEMBER
5 POSTS

I checked every fuse under the hood and inside the car and all were good. A diagram would be awesome. Thanks

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Tuesday, May 19th, 2009 AT 9:14 AM

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Here is the Schematic for the DLC... I will also email it to you for easier reading. I cannot find the Fuse Block Diagram for Fuse Locations....

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Wednesday, May 20th, 2009 AT 4:17 PM

FRANMOSSO

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5 POSTS

Thank you very much for the info. It will help immensly.

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Thursday, May 21st, 2009 AT 4:04 AM

FRANMOSSO

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5 POSTS

OK, I found the fuse that powers the scanner and replced it. Now when I hook up the scanner, it trie to link with the car but keeps comming up with link failure. Any ideas?

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Thursday, June 4th, 2009 AT 5:56 AM

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

With ignition off test for an open between the DLC terminal 2 and the terminal on the PCM harness connector that contains the class 2 serial data circuit.

Post results.

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Friday, June 5th, 2009 AT 9:26 AM

FRANMOSSO