Power Mirrors

Power Mirrors:

General Block Diagram:

Functional Description:

Mirror Adjustment:

The adjustable power mirror can be operated as of ignition switch position 2 and has the following settings:

- Switchover from left to right outside mirror.
- Continuously variable setting of vertical and horizontal planes.

Mounted in the outside mirror housing are an electric motor and a magnetic clutch.

The swivel movement (left, right, up, down) of the outside mirror is determined by the direction or rotation of the electric motor, i.e. the polarity of the applied voltage.

When voltage is applied to the magnetic clutch, the mirror can be moved vertically. When no voltage is applied to the clutch, the motor adjusts the mirror horizontally.

Mirror Heating:

Mirror heating is controlled by a thermostat mounted on the mirror glass. The heating conductor is integrated in the mirror glass.

The heating is switched on at temperatures below + 15 C° +/- 5 C° at the mirror. The heating is switched off at a temperature of 60 C° +/- 10 C°.

A new heating cycle starts when the temperature at the mirror has once again dropped below + 15 C° +/- 5 C°.

The defrosting rate at - 10 C° (icing) is approx. 5 min at a power consumption of approx. 1.5 A.

Interior Rear-View Mirror with Automatic Dip Function:

General:

Automatic dipping of the mirror is only effective when the parking light is switched on.

Operating Principle:

Two photoelectric cells are integrated in the mirror housing. One photoelectric cell is arranged at the front (on the mirror glass side) and determines the incidence of light from the rear window of the vehicle, e.g. caused by following vehicles. The second photoelectric cell is located at the rear of the mirror housing and determines the incidence of light over the windscreen.

The difference in brightness is constantly determined by the electronic circuitry in the mirror housing. If the incidence of light from the rear window is greater than the incidence of light from the front (dazzling from rear), an electric motor moves the interior mirror upward into the dipped position. A green LED indicates that the interior mirror is dipped. When the driver can no longer be dazzled, the mirror returns to its normal position after a delay time of approx. 3 seconds.

Slide Potentiometer:

The sensitivity of the dip function can be influenced with the aid of the slide potentiometer. The automatic dip function is made inactive when the potentiometer is moved completely to the left. The mirror is constantly dipped in the right end position.

Function Test:

Test A:

a) Switch on parking light, slide potentiometer set to AUTO (mid-position).
b) Cover photoelectric cell in rear of mirror housing.
c) Shine pocket lamp on front photoelectric cell (mirror side) (at a distance of approx. 40 cm). Interior mirror must dip. Green LED must light.

Test B:

a) Switch on parking light, move slide potentiometer to right-hand end position.
b) Interior mirror must dip. Green LED must light.
c) Move slide potentiometer to left-hand end position. Interior mirror moves to normal position. Green LED goes out.