Version 25.09.2019
HW: 25-10
VL2-MTC
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2.8.2.
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Case 2: CAN-box does not receive the reverse gear signal
If the CAN-bus interface does not r12V on the green wire of the 6pin to 8pin cable
when reverse gear is engaged (not all vehicles are compatible) an external switching signal
from the reverse gear light is required. As the reverse gear light signal contains electronic
interference, a traditional open relay (e.g AC-RW-1230 with wiring AC-RS5) or filter (e.g. AC-
PNF-RVC) is required. Below schema shows the use of a relay (normally open).
Cut the green cable of the 6pin to 8pin cable close to the black 8pin connector and
isolate the shorter end of the green cable near to the 8pin connector (CAN-box side).
Connect the reverse gear light signal/power to coil terminal (85) and vehicle’s ground
to coil terminal (86) of relay.
Connect the rear-view camera power wire and the green wire (video interface side)
of the 6pin to 8pin cable both to output terminal (87) of the relay.
Connect permanent battery power to input terminal (30) of relay.
Note:
If, due to a missing CAN communication, the 6pin to 8pin cable has been connected
the analogue way instead of the Can box, the green wire’s connection has also to be done as
shown in the picture above.
