[Gmecm] DLC question

[Scott Pearson]

Green was traditionally E&C data. Might check and see if it connects to the 
radio.

Scott

----- Original Message ----- 
From: "WopOnTour" <wopontour at hotmail.com>
To: <gmecm at diy-efi.org>
Sent: Monday, August 06, 2007 10:01 PM
Subject: Re: [Gmecm] DLC question


> Steve:
> According to the wiring 2001 thru 2003 DLC wiring schematic, there should 
> only be 4 wires to your DLC.(as you  indicated)
> The green wire you have in pin 14 has likely been something added by some 
> after market accessory or gage. While it's true pin 14 is designated for 
> CAN, there was not CAN (GMLAN) implemented (at the DLC at least) into any 
> GM truck in 2002. If there WAS (eg. as for the Parallel Hybrid Truck -PHT 
> a couple years later in 2004)  it would be DUAL WIRE CAN (aka High Speed 
> GMLAN) and therefore would also require there be a wire in pin 6 (HS GMLAN 
> +). These wires are usually tan (pin 14 GMLAN HS-) and tan/wht  (pin 6 
> GMLAN HS+)  What do you measure on that wire with a DVOM or DSO??
> Regards
> WOT
>
> ----- Original Message ----- 
> From: "Steve Ravet" <Steve.Ravet at arm.com>
> To: <gmecm at diy-efi.org>
> Sent: Saturday, August 04, 2007 9:37 PM
> Subject: [Gmecm] DLC question
>
>
> The schematics for my truck ('02 K1500) show 4 wires to the DLC:
>
> pin 2:  class2 data
> pin 4:  gnd
> pin 5:  gnd
> pin 16: Vbatt
>
> But my actual connector has a fifth wire, green, on pin 14.  The OBD2
> spec seems to say this is a CAN line, but if CAN were implemented there
> would have to be a wire in pin 6 also, and there's not.  Any idea what
> this wire might be?
>
> thanks,
> --steve
>
> -------------------
> Steve Ravet
> ARM
> steve.ravet at arm.com
>
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