Function, curve lighting

Fig 1: Curve Lighting Function

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The light image of the headlamps can be turned maximum 15 degrees in either direction. The outer headlamp when in a curve is turned half as much as the inner one. For example, in a sharp right curve, the right headlamp will be turned 15 degrees while the left one will be turned half as much - 7.5 degrees. This serves to broaden the light image. Information on the current steering angle comes from CIM via the bus.

The system is active when the engine is started and the light switch is in position 2. At speeds exceeding 0.5 km/h, the reaction in the headlamps is activated gradually. At 10 km/h, they have full reaction capability.

Fig 2: Curve Lighting Function Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Thus, the curve lighting function cannot be controlled by sitting in a stationary car and turning the steering wheel.

Fig 3: Curve Lighting Function Diagram - Turning Steering Wheel

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When reverse gear is engaged, the headlamps are positioned straight ahead. There is no headlamp reaction when the steering wheel is turned.

Fig 4: Curve Lighting Function Diagram

Courtesy of SAAB-SCANIA OF AMERICA, INC.