Very interesting.

I see ECU 23 shown in the later MY diagrams.

Was this OBD capability planned part and parcel with the
"programmable" (my term) ECU's?

Neil.

On Mon, Mar 11, 2013 at 9:44 PM, mark drillock <mdrillock@cox.net> wrote:

> The 5 pin ECU power relay has nothing to do with the fan or AC, contrary
> to various parts venders listings. The extra relay pin has to do with
> the OBDI capability that VW was working to implement into the Vanagon to
> comply with pending emissions regs. FI harnesses that are set up for the
> 5 pin relay have extra ECU wiring pins and the 5th relay pin connects to
> the ECU on one of these.

--
Neil n

65 kb image Myford Ready For Assembly  http://tinyurl.com/64sx4rp

'88 Slate Blue Westy to be named.

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG Gas I4/VR Swap Google Group:

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines