System Description

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

The headlamp aiming system is controlled by the headlamp aiming switch.

Power is supplied at all times

Through 50A fusible link (letter f , located in the fuse and fusible link box)
To BCM (body control module) terminal 70, and
To headlamp low relay, located in the IPDM E/R (intelligent power distribution module engine room), and
To ignition relay, located in the IPDM E/R, and
Through 20A fuse (No. 53, located in the IPDM E/R)
To CPU (central processing unit) of the IPDM E/R.

With the ignition switch in the ON or START position, power is supplied

To ignition relay, located in the IPDM E/R, and
Through 10A fuse (No. 59, located in the fuse and relay box)
To BCM terminal 38.

When the ignition switch is in the ACC or ON position, power is supplied

Through 10A fuse [No. 4, located in the fuse block (J/B)]
To BCM terminal 11.

When the lighting switch is in the 2ND position or AUTO position (auto lights ON), the headlamp low relay (located in the IPDM E/R) is energized. When energized, power is supplied

Through 15A fuse (No. 41, located in the IPDM E/R)
Through IPDM E/R terminal 26
To front combination lamp LH and RH (headlamp aiming motor) terminal 8.

Ground is supplied

To front combination lamp LH and RH (headlamp aiming motor) terminal 4
Through grounds E9, E15 and E24, and
To front combination lamp LH and RH (headlamp aiming motor) terminal 7
Through headlamp aiming switch terminal 1
Through headlamp aiming switch terminal 2
Through grounds M57, M61 and M79.

With power and ground supplied, headlamp aiming motors operate according to the aiming switch position.