Bought a #Mercedes #48V #MHEV #startergenerator for #reverseengineering.
The specs are impressive, especially for the price point of a few hundred euros.
- 48V / ~200A
- 12.5 kW peak
- 165 Nm peak
The main difficulty lies in finding out the #CAN commands for initialization and control.
I don't have access to a Mercedes E200 EQ Boost (or similar), so "just sniffing" is out.
Maybe somebody could help me with that tho? ^^'
After much digging I at least found the pinout in some Mercedes shop software.
But unsurprisingly the #startergenerator didn't send any messages on its own on the #CAN bus when hooked up to 12V.
It did draw 11 mA tho, so at least the pinout seems correct and the controller appears awake.
Trying to send some #CAN messages to the #startergenerator didn't prove successful either.
I'm not well versed in CAN, but the dongle just kept trying to send the single message on repeat.
So I guess it didn't receive a CAN ACK?
Afaik, all transceivers in a bus should ACK a frame, no matter if they're addressed or not.
Not sure why it didn't work. Maybe I was on the wrong baud rate or this device behaves weirdly and only sends ACKs after getting a magic message?
Another mystery I couldn't solve yet: Which #automotive #connector is this?
After some research, it looks pretty similar to some variant of the AMP MCP series, but I could not find an exact match.
Dimensions:
Outline WxH: 21.35 x 16.5 mm
Depth: 21mm
Centerline pitch: roughly 4mm
LeoDJ
fab 🐘