Trying to wrap my head around this. I have no can bus communication. According to elsawin, the diagnostic can lines are switched, which I understand opens when interrogated, is closed otherwise. The internal can is working fine, both drive and comfort. basically the only problem is that the gateway ...

Kim, I did. the signal attached is a communication attempt in vcds with the gateway module, pico pins inserted into the back of the obd plug. Update: today I could communicate with the 46 comfort module. It's supposed to be routed through the gateway, but then why won't the gateway talk? Edit: just ...

Dear Kim, I'm happy at least someone enjoys this :D Here is a 200ms communication attempt with the gateway, taken at obd plug. Dear wiki38andy, I don't understand. you're saying to unplug the xs6 plug from gateway and check system reaction? Edit: I'm getting http errors when trying to attach the log...

It looks like CAN HI is shorted to ground. Is there any continuity between any CAN pins 6/14 and ground? Disconnect the CAN gateway connector with CAN lines coming from OBD pin6/14 and post the measurement. Do the same on good car. The wires on pin 6/14 going to the OBD is about a 50 cm wire, strai...

I'm back with more measurements. I'm hoping someone can decode them or make more sense of them. I got the loan car again for the day so I took the same measurements on both: can high and can low, pins 6 & 14 on obd plug, earth to battery negative. Since the can gateway is switched type, i have measu...

wiki38andy wrote: ↑

Wed Apr 10, 2024 9:41 pm

Remove pin 7(K line) from OBD socket so as to have CAN comm only with CAN gateway.

there is no can comm. at all
https://ibb.co/K6F5fbr][img]https://i.ibb.co/K6F5fbr/vcds-test.png[/img">

The CAN signal on OBD socket comes from interface. Back probe CAN gateway pins for two wires coming from OBD pins 6/14 to check if you have the same signal from interface. As you have already swapped CAN gateway module there should be a harness/pins issue, only. Nothing to do with any other modules...

There is communication between the modules. They see each other, no communication errors either. The only problem is, that I can't communicate with on can for some reason, only K-line with engine. pins are all OK. Wiring ok, pins ok, continuity ok, modules ok.
I just can't explain it anymore

This is the signal measured on an obd plug breakout box, but only with an interface connected. without an interface it sits at 0.

Resistance is 57 Ohm everywhere.
I made 3 measurements as you asked, I hope this is what you meant. All measurements taken to your specifications on the drivetrain wires. I had a charger attached for the battery, every module connected, key on, engine off.