a6 C5 black screen after installation - need help !

[burny]

hello guys,

I am testing my colormfa into my A6 C5, before closing the cluster.
But the screen remains black !

I have checked twice the connections.

There was a mistake with the ground and ignition wires. I solded 22 and 23 (blue connector) instead of pins 23 and 24. Now I have sold it correctly, but it still doesn't work.

When I switch on the ignition, I can see that illumination of colormfa is ON. So I assume the power and ground pins are OK, but I have absolutely no information on the LCD.

below you have a small video of my problem
https://wetransfer.com/downloads/deb9e3 ... 54/086137

where the issue could come from ?
any help will be appreciated !

[denis94]

hello burny (from audipassion?),

you inverse alimentation of the card its the probleme .
i think that something flash in the regulation of the mainboard of colormfa.

good luck...

[burny]

yes it's me.

I hope that it can be repaired

[autopilot]

If you sure what ColorMFA LCD backlight is working, check flexible cable from LCD. Disconnect and connect it back.

[burny]

Thanks i will try..

Cross the fingers!

[burny]

yeehhaaah it works !!

https://wetransfer.com/downloads/bb17ef ... 705/1c1e32

thanks a lot guys !!

now I need to understand why boost pressure remains at 0.00, while I have connected additionnal wire to ECU loom..

[autopilot]

How you see boost value ? At idle ?
What engine code ? How you connect (what wire on engine ECU, what pin in cluster connector) ?

[burny]

Yes ,
I was in the garage, speed 0km/h and i pressed on gas pedal several Times (strongly and shortly). But it remains at 0.0bar.

I checked also on measure group 115, and boost pressure is moving when i press the gas pedal .

My engine is a 2.7T code ARE.

I checked, i am on pin32 into the gray connector.
I need to open again the ECU box, but normaly i am on wire 101. (I have official electrical schemes)

[burny]

finally, everything works correctly, even the boost pressure gauge.

i have a small bug when i want to repeat the acceleration 0-100 km/h. "Reset" button is not working, I will share a movie in a separate topic . But that's not a big deal