Skip to main content ↑ ↓
Topic: Diagnostic ports. 12 pin and 9 pin in the same coach? (Read 551 times) previous topic - next topic

Diagnostic ports. 12 pin and 9 pin in the same coach?

As far as I know from 2001 on our coaches have a round 9 pin diagnostic port located on the wall to the left of the driver's foot well.  There is also one in the engine bay.

Does any one have a 12 pin rectangular connection as well?  This picture is from a 2003 U320.  Any idea what it does or why it is there?

Thanks
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Diagnostic ports

Reply #1 –
Any electronic coach 1996 or earlier should have a 12 pin rectangular OBD2 connector under the dash. I have an adapter to go to our ProLink 9000 from that. Not very expensive on ebay.

The U300s with the 2 cycle may be the only ones with the 12 pin as I don't know of any other early electronic Foretravels. I think the Allisons used the 12 pin also.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Diagnostic ports

Reply #2 –
I am not looking for older coaches with the only the 12 pin connections, I am looking for 2001 and newer with both a round 12 pin port and a 12 pin rectangular port.

Why is it there and why was it added?
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #3 –
Quote from: Pierce & Gaylie Stewart –
Any electronic coach 1996 or earlier should have a 12 pin rectangular OBD2 connector under the dash. I have an adapter to go to our ProLink 9000 from that. Not very expensive on ebay.
Pierce
The picture posted is not a standard OBDII interface.  They have angled sides and 16 pins.
Keith
2003 U320 38' #6197

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #4 –
I have both plugs. VMSPC is connected into the rectangle 12 pin plug.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #5 –
I've got the same Richard.  I'm also connected to the 12-pin now and have all data.  The 9-pin worked, but did not show transmission gear info, retarder temp or odometer stuff in the trip meter.

We are the only 2?
Keith
2003 U320 38' #6197

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #6 –
Hum, will check today.

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #7 –
Scott, you will not find a 12 pin plug on a 2001..  It seems having both are only 2003s as far Is I have discovered yet.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #8 –
Keith, we are two of a kind! Haha.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #9 –
Quote from: Roger & Susan in Home2 –
Scott, you will not find a 12 pin plug on a 2001..  It seems having both are only 2003s as far Is I have discovered yet.
The ever changing world we live in?

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #10 –
So your '01 has both and my '03 has both.  Need to ask @fourdayoff if he has both on his '02, when he comes up for air.
Keith
2003 U320 38' #6197
 

Re: Diagnostic ports. 12 pin and 9 pin in the same coach?

Reply #11 –
I have both on my 2002
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI