Re: MAC-10 connector wires

[orin@wolfenet.com]

> Audi quattro - MB engine (MAC-12) ECU wiring

> The  ECU is connected to the wiring harness via a  latch-
> and-swing  connector.   With the  ECU  removed  from  the
> vehicle,  the wiring harness connector should  be  viewed
> with  the  plastic prongs on the right and  the  locating
> lugs  along  the side of the connector at the  top.   The
> upper  left pin is Pin 1, with numbering proceeding along
> the connector to Pin 18 at the top right.  The bottom row
> is  also numbered from left to right, from Pin 19 to  Pin
> 35.

> 1.        Blue/White         Cold Start Valve (N17)
> 2.        Brown/Yellow       Chassis
> 3.
> 4.
> 5.        Brown/Yellow       Chassis
> 6.
> 7.        Mauve              Idle  Stabiliser (J142), Oil
>                              Pressure Warning Controller
> 8.        Blue/Black         Frequency  valve  (N7), T35/3
> 9.        Brown/Red          Chassis
> 10.       Blue               Coolant Temperature (G62 - side
>                              of block)
> 11.       Blue               Engine RPM Sensor (G28)
> 12.       Mauve              Ignition Timing Sensor (G4)
> 13.       Red                Ignition Timing Sensor (G4)
> 14.       Blue/White         Electronic Thermoswitch (F76)
> 15.       Brown              Knock Sensor (G61)
> 16.       White              Knock Sensor (G61)
>           Brown              (shield for above)
> 17.
> 18.       Brown/Yellow       Chassis
> 19.       Green/Yellow       Wastegate Control Valve (N75)
> 20.       Grey               Idle Switch (F60), Idle
>                              Stabiliser (J142)
> 21.       Brown/Red          Fuel Pump Relay (J17)
> 22.       Green/White        Electronic   Ignition
>                              Power Stage (N70)
> 23.       Brown              Inlet Air Temperature Sensor (G42)
>           Brown/Red          Hall Sensor (G40)
> 24.       Blue               Hall Sensor (G40)
> 25.       Red/Black          Hall Sensor (G40)
> 26.       White              Full Load Switch (F81)
> 27.       Green              Hall Sensor (G40)
> 28.       Brown              Shielding for 11, 12, 13, 29
> 29.       Grey               Engine RPM Sensor (G28)
> 30.
> 31.       Black/White
> 32.
> 33.
> 34.       Brown/Yellow       Chassis
> 35.       Black/Red          Power via Fuse (S34, 10A)


Matches the MAC11B pretty closely.  All I saw missing was the O2 sensor
input and the charcoal canister output.  Most of what we have found for
the MAC11B is going to apply.  BTW pin 31 on the MAC11B goes to the
check engine indicator.  I'd like to see a dump of the MAC12 EPROM if
you pull it or already have.  I'll bet it's almost the same with the
O2 closed loop code disabled/removed.

Orin.