glennlindh

When I measure the voltage in the "lil" red cable on my TCU harness it does not go up higher than this, more like 7.8 - 8 volt..

glennlindh

took apart the whole rig, well, almost

glennlindh

As so many other AUDI's, all the gauges lights up! Just wanted to be as it supposed to be..

glennlindh

another guy here on AudiWorld had issue with shortening of the TCU, the lid caused it, so I zip tie mine just in case

glennlindh

So when and how do I know, that I need a new TCU??

glennlindh

And mine is automatic, so how do I press a clutch pedal?? Just saying!!

hqbmw1@gmail.com

[QUOTE=glennlindh;24774704]And mine is automatic, so how do I press a clutch pedal?? Just saying!! [/QUOTE

You may be showing your problem on your Fluke meter.

Terminal 30 isn't just from battery to starter and fuse panel. Terminal 30 is Battery (+) throughout the car. In other words any terminal 30 should have full battery voltage.

I haven't looked at the etm to see if any tcu terminal is B+, but assume the wire you are checking being red, should be B+ or 13.5 volts or more. You show only 8.0 which is a huge voltage drop unless your battery is dead.

I think you are on the right track since you show low voltage and scan says B+ is missing. You need battery voltage in that wire.

glennlindh

[QUOTE=hqbmw1@gmail.com;24774736]Thanks for reply
Thu, me and the Bentley does not go together, I tried to find out what cable that support the TCU harness the 12v, but I can't find the color/cable..
If/then I "jump" the harness with direct 12v it does not help my issue..
It is still same problems..
18034 - Powertrain Data Bus
P1626 - 35-00 - Missing Message from TCU

18010 - Power Supply Terminal 30
P1602 - 35-00 - Voltage too Low

glennlindh

[QUOTE=glennlindh;24774738]Ohh I forgot, the connection station under the left kick panel, fuses etc.. they are all 12v, and my battery is new, and charger still connected..

glennlindh

Even with my Ross-Tech I can't find connection to the TCU!?