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The signal for headlight range control
The adaptive air suspension control unit
sends the headlight range control unit a CAN
message about the momentary body level on
all four wheels.
The headlight range control unit uses this
information to calculate the required head-
light setting in each case.
The terminal X signal
Loads that consume a lot of power are briefly
switched off during the starting process. This
applies to the compressor of the adaptive air
suspension system.
Information about terminals 15 and 50 is sent
to the access and start authorisation control
unit J518 via discrete lines from the access
and start authorisation switch E415.
The J518 transmits the terminal X message
via CAN bus to the adaptive air suspension
control unit.
This then prevents the compressor from run-
ning whilst the terminal 15/terminal 50 mes-
sage is valid.
