Starter interlock removal and reverse lightsOn the 10-pin F125 range selector switch plug:
[*]Jumper pin 9 and 10 together, this will disable the starter interlock (car had to be in park to start; you could maybe make this a clutch in to start switch but I didn't)
[*]Pin 7 and 8 you wire up to you reverse switch, polarity doesn't matter since it's an open/closed switch.
You can do this a few way as hinted at in the parts list. You can buy the connector parts from Audi/TE, buy the harness from Advanced Automotion, hack up your old switch, hack up a new switch, or hack up your engine/trans harness and make it whatever connector you want.
Connector: Audi 6X0973815 Pins: TE 964269-2 Seals: 963530-1
Clutch switchThe ECU needs a functioning clutch switch to work properly, otherwise you'll have rev-hang.
The switch needs to normally open (ie. when the clutch pedal is depressed the circuit is broken). The circuit is a positive voltage circuit, not a grounding circut like some switches are.
8D0911807A is supposed to be a clutch switch, but the one that I received operated in reverse (ie. normally closed). When I installed I had all kinds of issues since I didn't notice that it was functioning in reverse (ie. when clutch was in, it told ECU clutch was out and vice versa). The car was super hard to drive and of course cruise control didn't work.
So instead of ordering another clutch switch I had a spare D2 brake switch sitting around that I used. The D2 brake switch has 4 pins/2 separate switches (an initial brake test switch and a brake light switch). Each of these 2 circuits functions opposite, so you get both normally-open or normally-closed switches in one. The smaller set of pins is the normally-open circuit that you want to you.
One side of the clutch switch goes to ECU pin #39 as detailed previously. The other side gets switched 12v power. I tied into the switched 12v power that the brake switch uses, which is the black/yellow wire on my D2 (check the Bentley for your specific model/year).
You can use VCDS ECU measuring blocks 66 to verify functionality of the clutch switch (and cruise and brake switch).
Module Coding- ECU:
If your tuner hasn't done so already, you need to change your soft coding to '10713'
Which is (10) Euro Emissions III since you're using the Euro MT bin file, (7) AWD w/ESP, (1) 6MT, 3 D2 A8/S8
You could disable ESP with the soft-coding if you'd like but I keep it engaged and then you can disable with the button.
Another thing to note about the ECU which I came across is the cruise control. I'm presuming that when mine was flashed to the euro file the cruise control was turned off in the ECU. This is supposedly pretty common for new ECUs out of the box. You can verify by connecting to the ECU and looking at the Component field. If it says '4.2L V8/5V G' then cruise is enabled. If the 'G' is not present as was my case, then cruise control must be re-enabled. You can do this by performing a 'Login' and coding '11463'. You might need to key-off the ignition and reconnect to the module to verify you now have the 'G' in the component field.
More details here: http://wiki.ross-tech.com/wiki/index.ph ... ing_Values
- ABS:
Change coding to 08395 using login 05495
- Instrument Cluster:
To tell the cluster to no longer look for the TCU go to Adaptation, channel 60 and set to 1025. This isn't 100% necessary, but prevents you from having the cluster give you an error code for the missing TCU.