Originally Posted by
hector2001
Hello,
I finally managed to install Lowline RVC, everything is working OK : when reverse gear is engaged, camera pops up and MIB STD2 displays the rear view with static lines.
I installed a manual switch, in order to activate the rear camera without reverse gear :
+12V from reverse light or +12V from car (switch) ==> to +12V camera
With this switch installed :
- with reverse gear : the camera pops up and rear view is displayed.
- without reverse gear : when I manually switch to +12V from car, the camera pops up but there is no display.
Does this mean reverse gear is required, in any case, in order to display rear view ?
Hector: Hi.
Alas, installing a separate 12V switch in an attempt to manually turn-ON the RVC won't work (well..not in most instances)!!
The operation of a RVC on MQB platform cars has two separate switch-ON and switch-OFF protocols.
As you have discovered, the switch-ON protocol is a 12V signal to the wire that also illuminates the right-side reverse light. However, the switch-OFF protocol for the RVC is the car's speed. Whenever the car is traveling at a speed beyond a threshold value, the RVC function will be disabled. IIRC, the default threshold speed to switch-OFF the RVC ain't high - about 10 km/h, I think!
Of course the factory set-up assumes that the signal from the reverse light won't be active when the car moves forward - but your manual RVC switch will NOT over-ride the camera's switch-OFF function without modifications to the MIB software (which normal diagnostics devices can't make)
I suspect this is the reason for your observation
Don
PS: Your manual RVC switch should work OK when the car is moving forward at low speed, or when stopped and not in reverse gear
Last edited by DV52; 19-06-2024 at 12:03 PM.
Please don't PM to ask questions about coding, or vehicle repairs. The better place to deal with these matters is on-line, in the forum proper. That way you get the benefit of the expertise of the wider forum! Thank you.
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