Diesel Benz
MB Enthusiast
Yes, more than one.
You would get better replies if you explain that you are not asking this because of some "CAN BUS LEDs".
You would get better replies if you explain that you are not asking this because of some "CAN BUS LEDs".
Canbus error free LEDs are the worst named thing. Its nothing to do with CANbus, its to do with bulb failure detection.
Anyway, let us know what you are trying to do and someone will help no doubt
R
Anyway, let us know what you are trying to do and someone will help no doubt
R
Thank you for the replies!
I am not doing anything with LEDs. I am installing an after market alarm as my car doesn't have an alarm, only keyless entry, and attempting to determine the door locks. I know the system uses vacuum and there are only three wires going to teh vacuum pump:
- BRN = GND
- RED/WHT = +12V
- BLK/RED = Control
The BLK/RED goes from pump to gauge-cluster. Given there is only one wire to signal door PIN (open/close), driver unlock, all unlock & all lock, I thought it might be using CAN. After several discussions with others, I am told it is not CAN B but instead a resistance value for each.
I tried the suggested GND, GND+610Ohm & GND+630Ohm. It does work, occasionally but I could not get it to work consistently. Now I'm looking to find the exact values needed to interface the door locks, if in fact this is the correct way to interface.
Another suggestion was to try the (un)lock button with the hazard button. I believe the wire colour was GRN/YEL but I could never get the door locks to work at all from there.
NOTE: I have since confirmed the car has "CAN C", which is Engine CAN but cannot confirm "CAN B" which is Interior CAN, as per Mercedes Benz's description. There is a third CAN called "CAN D" which is their Diagnostics CAN.
I am not doing anything with LEDs. I am installing an after market alarm as my car doesn't have an alarm, only keyless entry, and attempting to determine the door locks. I know the system uses vacuum and there are only three wires going to teh vacuum pump:
- BRN = GND
- RED/WHT = +12V
- BLK/RED = Control
The BLK/RED goes from pump to gauge-cluster. Given there is only one wire to signal door PIN (open/close), driver unlock, all unlock & all lock, I thought it might be using CAN. After several discussions with others, I am told it is not CAN B but instead a resistance value for each.
I tried the suggested GND, GND+610Ohm & GND+630Ohm. It does work, occasionally but I could not get it to work consistently. Now I'm looking to find the exact values needed to interface the door locks, if in fact this is the correct way to interface.
Another suggestion was to try the (un)lock button with the hazard button. I believe the wire colour was GRN/YEL but I could never get the door locks to work at all from there.
NOTE: I have since confirmed the car has "CAN C", which is Engine CAN but cannot confirm "CAN B" which is Interior CAN, as per Mercedes Benz's description. There is a third CAN called "CAN D" which is their Diagnostics CAN.
