Headlamp Auto Aiming Operation: Notes

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

The height sensor detects a change in height of rear vehicle with ignition switch ON, and transmits signals to the AFS control unit:

When ignition switch is turn to ON position, power is supplied

to height sensor terminal 1
through AFS control unit terminal 6.

When ignition switch is turned to ON position, height sensor input signal is supplied

to AFS control unit terminal 28
through height sensor terminal 2.

Ground is supplied

to height sensor terminal 3
through AFS control unit terminal 8.

Aiming motor driving signal (voltage signal that corresponds to the vehicle height) is transmitted depending on the height sensor signal at the start of the engine

to front combination lamp LH terminal 12
through AFS control unit terminal 40,
to front combination lamp RH terminal 12
through AFS control unit terminal 19.

Output of aiming motor driving signal is maintained unless headlamp (HIGH/LOW) illuminate detected. Auto aiming control operation starts when headlamps (HIGH/LOW) illuminate detected.

When headlamps (HIGH/LOW) illuminate, output of aiming motor driving signal is changed according to the height sensor signal. After the change, it is changed according to height sensor signals with predetermined timing based on driving condition while headlamps are ON.