MAC-14 Diagnostics

[Cody Forbes]

http://www.ross-tech.com/vag-com/cars/applications/v8a8.html

That page says that Vag-COM will not communicate with the engine diagnostics 
on any 200 other then the 3B :-/. Another portion of thier site says that 
even if it has the 2x2 connectors it must have 4 wires, where some older 2x2 
connectors only had 3 wires.


Any way about it you should be able to blink codes, and the info on Scott's 
site should apply. Going back to basics a bit... is your MAC-14 known good? 
Beyond that, have you used a DMM to check continuity between the cproper 
diag wires and the ECU just to make sure theres nothing funky like a missing 
relay that the current pases through for some only-Hans-knows-why reason?

-Cody Forbes
http://www.5000tq.com
'87 5ktq - Fast.
'86 5ktqCD
'86 5k
'86 5k




Ben Swann wrote:
> I think we are confusing things here.  I am simply trying to blink
> out codes for now - should at least be able to do this.  In fact I
> know it can be done and have done it before, just not on a
> transplanted MC-2/MAC-14 setup.  And of course this is the MC-2 10V
> CIS hybrid not the 3B 20V efi , but there are many who subscribe to
> this list because the '89 and '90 200Q are more similar to the '91
> 20V despite that the engine is Motronic EFI instead of the hybrid
> variant that was MAC-14.  Furthermore the diagnostics techniques
> spelled out in the Bently for the MC-2 are actually quite similar to
> the 3B probably closer "procedure-wise" than the MC-1.  But still the
> option to blink out codes is there - just sometimes need to install a
> check engine light, according to procedure. I have the feeling some
> other things have been left out and because the procedure calls for
> using specialized VAG equipment, one needs to guess at what these
> things actually are.  I also think there may be errors or omissions
> in the diagram.
>
>
>
> With that, it would also be nice to use VAG-COM as the com interface
> is supposedly there.  So you are saying that you have not been able
> to use VAG-COM on an MC-2/MAC-14? I haven't either, but Bentley and
> SJM suggest it can be done.
>
>
>
> At the very least, I should be able to blink codes like on the MC-1.
>
>
>
> Ben
>
>
>
>  _____
>
> From: suffolkd at aol.com [mailto:suffolkd at aol.com]
> Sent: Wednesday, September 26, 2007 8:17 PM
> To: 200q20v at audifans.com; benswann at comcast.net
> Subject: Re: MAC-14 Diagnostics
>
>
>
> The earliest EU I could read was a 200 20V 3B.  AFAIK the MAc -14 is
> for a MC-2
> BAck when Vag Com came out i asked if it could read a 1990 200 10V
> (Mac - 14) we never tested it.
> VAg-Com site listed the 3B as the earliest to "work" a few years ago.
> I don't know if that has changed.....
>
> try http://www.sjmautotechnik.com/trouble_shooting/pinout.html#fourtp
>
> other searchs just brings up some of your posts :-)
>
>
>
>
>
> *********************************************************************
>
> **Ben*** Right - it  seems like I'm the one who ventures into these
> territories first. I have a complete pinout spreadsheet for wiring
> this beast and how to hook it up with Megasquirt.  I don't like
> putting things out there until everything is working right.  I
> figured someone has likely done an MC-2/MAC-14 transplant into a 4kq
> or CGT along with associated wiring. - then they would likely have
> had to go through this.  ***Ben***
>
>
>
>
> -Scott by BOSTON
> From: "Ben Swann" <>
>
> I'm trying to run codes on my MAC-14 ECU which is currently setup to
> do only
> Ignition for my Megasquirt setup.  The wiring harness has been
> completely transplanted,
>
> and I installed connectors for the ?dirty? OBD to connect to VAG-COM.
> VAG-COM is not picking
> up on it.
>
>
>
>
>
>
> Has anyone retrieved codes via VAG-COM for the MAC-14?
>
>
>
>
>
>
> I will try connecting to flash the codes, but would be nice to use
> the OBD features.
>
>
>
>
>
>
> Anyone had much success flashing the codes using fuse and CEL?  I
> don't have identical wiring with Fuel Pump Relay, but have wired
> according to Bentley.  Wondering if I am missing anything for this.
>
>
>
>
>
>
> Ben
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