jackbombay
Top Post Dawg
This is not all that bad actually, despite there being little to no information available online. I have an AHU swapped into an old vehicle, fwiw.
First off I VAG-commed a friends Passat and poked around witha test light so I could see what changed in channel 6 (engine measuring blocks) when you hit the brakes, clutch, set button, turned the cruise on, and hit the resume button.
Here are the details on that,
Cruise off: 000 000000
Cruise on: 000 000001
the following are all with the cruise switch on:
Clutch pedal depressed: 100 100001
Brake pedal depressed: 011 010001
Set button while depressed: 000 000101
resume button while depressed: 000 001001
You can use the above information to make sure you have it all set up right before you road test it.
Here is what the switches need to do,
(you need to pull the plug off the ECU to see all th enumbers for the various pins)
Clutch pedal switch: When the pedal is depressed the circut needs to be broken, the wire that needs to be un-grounded when the pedal is depressed is the white with red stripe wire from pin# 17 on the 68 pin connector, all the wires are from the 68 pin plug so I won't repeat that.
Brake pedal switch: 2 wires need to be connected to ground from a switch with 2 circuits, one circuit needs to be complete to ground when the pedal is not depressed (pin #20) and when the pedal is depressed pin #44 needs to become a complete circuit (and the pin #20 circuit needs to be broken at that same time. White with yellow stripe, pin #20 and black with red stripe, pin #44. According to some other info I found online one of those needed to be connected to 12V at the same time the other was grounded, but both hooked to ground worked for me.
I did mess around hooking up both of those wires to power and to ground trying to get it all to work and didn't screw anything up so mess with it however you want, just make sure it all works according to Vag-com as posted above. If you fry your ECU though it's not my fault.
For the cruise buttons themself:
Continous power supplied to pin #66, balck with white stripe, turns/keeps the cruise control on, power removed from pin 66 turns it off.
Your set button when pressed should momentarily send power to pin #35 which is a solid red wire.
Your resume button when pressed should momentarily send power to pin #34 blue wire with green stripe.
.
You'll also need to wire the VSS (Vehicle Speed Signal) to the ecu, that needs to be hooked up to pin #43 blue wire with white stripe.
Hope this helps!
First off I VAG-commed a friends Passat and poked around witha test light so I could see what changed in channel 6 (engine measuring blocks) when you hit the brakes, clutch, set button, turned the cruise on, and hit the resume button.
Here are the details on that,
Cruise off: 000 000000
Cruise on: 000 000001
the following are all with the cruise switch on:
Clutch pedal depressed: 100 100001
Brake pedal depressed: 011 010001
Set button while depressed: 000 000101
resume button while depressed: 000 001001
You can use the above information to make sure you have it all set up right before you road test it.
Here is what the switches need to do,
(you need to pull the plug off the ECU to see all th enumbers for the various pins)
Clutch pedal switch: When the pedal is depressed the circut needs to be broken, the wire that needs to be un-grounded when the pedal is depressed is the white with red stripe wire from pin# 17 on the 68 pin connector, all the wires are from the 68 pin plug so I won't repeat that.
Brake pedal switch: 2 wires need to be connected to ground from a switch with 2 circuits, one circuit needs to be complete to ground when the pedal is not depressed (pin #20) and when the pedal is depressed pin #44 needs to become a complete circuit (and the pin #20 circuit needs to be broken at that same time. White with yellow stripe, pin #20 and black with red stripe, pin #44. According to some other info I found online one of those needed to be connected to 12V at the same time the other was grounded, but both hooked to ground worked for me.
I did mess around hooking up both of those wires to power and to ground trying to get it all to work and didn't screw anything up so mess with it however you want, just make sure it all works according to Vag-com as posted above. If you fry your ECU though it's not my fault.
For the cruise buttons themself:
Continous power supplied to pin #66, balck with white stripe, turns/keeps the cruise control on, power removed from pin 66 turns it off.
Your set button when pressed should momentarily send power to pin #35 which is a solid red wire.
Your resume button when pressed should momentarily send power to pin #34 blue wire with green stripe.
.
You'll also need to wire the VSS (Vehicle Speed Signal) to the ecu, that needs to be hooked up to pin #43 blue wire with white stripe.
Hope this helps!
Last edited: