OBDII Port completely dead - which control module presents this interface?

[jeffm333]

2013 Suburban Z71. OBDII port completely dead - won't power on generic scan tools. VXCNano is ordered, but I'm expecting it to also see nothing as the port appears completely dead, regardless of the key position in the ignition switch.

I thought that the Body Control Module (BCM) would be the critical device for hosting and presenting data on the OBDII port under the dash, but in all of my research, reading, youtube-watching, and talking with a mechanic, there have been a few bits of input indicating it isn't that simple, and that a dead OBDII port may be due to ECM issues or other issues as well.

Can someone confirm/deny this? Or have any other input?

 

[Doubeleive]

2013 Suburban Z71. OBDII port completely dead - won't power on generic scan tools. VXCNano is ordered, but I'm expecting it to also see nothing as the port appears completely dead, regardless of the key position in the ignition switch.

I thought that the Body Control Module (BCM) would be the critical device for hosting and presenting data on the OBDII port under the dash, but in all of my research, reading, youtube-watching, and talking with a mechanic, there have been a few bits of input indicating it isn't that simple, and that a dead OBDII port may be due to ECM issues or other issues as well.

Can someone confirm/deny this? Or have any other input?

check that you have power at the cigarette power plug, if the port is dead then the fuse is blown and that fuse also provides the DATA power for the obd port, this is separate from the 12v power & ground that is at the obd port already

 

[Doubeleive]

you can also use a meter and check pin 16 & 4, 16 should be 12v and 4 should be ground, if not then there is a different problem. those pins are power only, not for data

 

[opfor2]

2013 Suburban Z71. OBDII port completely dead - won't power on generic scan tools. VXCNano is ordered, but I'm expecting it to also see nothing as the port appears completely dead, regardless of the key position in the ignition switch.

I thought that the Body Control Module (BCM) would be the critical device for hosting and presenting data on the OBDII port under the dash, but in all of my research, reading, youtube-watching, and talking with a mechanic, there have been a few bits of input indicating it isn't that simple, and that a dead OBDII port may be due to ECM issues or other issues as well.

Can someone confirm/deny this? Or have any other input?

Did you ever find the issue of why you did not have power to your OBDII plug? I'm having the same issue CEL came on went to plug my Bi-directional scanner and no power to the scanner.

 

[solli5pack]

South Main did a video on this exact issue.

 

[opfor2]

South Main did a video on this exact issue.

Thank you will check this next.

 

[opfor2]

South Main did a video on this exact issue.

****SOLVED**** Watched the YouTube video and checked fuse 53 in the under-hood fuse box and it was blown, replaced and now all is well. Not sure how or why it flew but we will keep an eye on it. Thank you for the assistance.

 

[j91z28d1]

Watched the YouTube video and checked fuse 53 in the under-hood fuse box and it was blown, replaced and now all is well. Not sure how or why it flew but we will keep an eye on it. Thank you for the assistance.

the fuse also runs power to your right dash aux port. if you plug a phone adapter or something in there. it's possible to pop the fuse

i don't really read the wiring diagrams that way. but i made my aux port switched by ign power for convenience and my obd2 port is switched now too.


eh.. gm lol.