GF82.10-P-1001TT Headlamp Range Adjustment (HRA) Headlamp Function

GF82.10-P-1001TT Headlamp Range Adjustment (HRA) Headlamp Function
- with CODE (614) Bi-xenon headlamp unit
- with CODE (615) Bi-xenon headlamp unit with integrated curve illumination

Component Identification:

Headlamp range adjustment is prescribed by law to prevent xenon headlamps dazzling oncoming traffic.
The headlamp range control automatically maintains the inclination angle of the headlamps within the legally defined limits regardless of the vehicle load.

Function requirements
^ Circuit 15 ON
^ Terminal 61 ON

Function
On model 211.0 without code (489) Airmatic (semi-active air suspension) the data of the front axle level sensor (B22/2) and the rear axle level sensor (B22/3) are read in directly by the headlamp range adjustment control unit (N71).
On model 211.2 without code (489) Airmatic (semi-active air suspension) the data of the front axle level sensor (B22/2) are read in directly by the headlamp range adjustment control unit (N71). The data of the rear axle level sensor (B22/3)3 are read in by the rear axle level control system control unit (N97) and transmitted to the headlamp range adjustment control unit (N71) via CAN Class C.

On model 211 with code (489) Airmatic (semi-active air suspension) the data of the left front level sensor (B22/8), right front level sensor (B22/9), and rear axle (B22/3) are read in by the AIRmatic with ADS control unit (N51) and transmitted to the headlamp range adjustment control unit (N71) via CAN Class C.

The headlamp range adjustment control unit (N71) forwards the evaluated data via the HRA [LWR] bus to the driver-side SAM control unit with fuse and relay module (N10/1). The HRA [LWR] power module (E1n3) on the left front lamp unit (E1) actuates the front left headlamp range adjustment motor (E1m1), the HRA [LWR] power module (E2n3) on the front right lamp unit (E2) actuate the right headlamp range adjustment motor (E2m1). The headlamp range adjustment motors (E1m1, E2m1) relay their respective position to the HRA [LWR] power module (E1n3, E2n3) via internal potentiometers.