Exterior Mirrors
Exterior Mirrors
Exterior mirrors
The exterior mirrors are centrally adjusted using the exterior mirror adjustment switch in the driver's door.
Brief component description
The following components are described for the electrical exterior mirrors:
- Exterior mirror adjustment switch
- Outside temperature sensor
- Auxiliary instrument
- Junction Box Electronics (JBE)
- Position potentiometer
- Exterior mirror fold-in control unit
Exterior mirror adjustment switch
The electrical exterior mirrors are adjusted using the exterior mirror adjustment switch in the driver's door. The exterior mirror adjustment switch controls the motors of the electrical exterior mirror.
Outside temperature sensor
The outside temperature sensor records the ambient temperature. The outside temperature sensor sends this information directly to the auxiliary instrument.
Auxiliary instrument
The auxiliary instrument processes the information from the outside temperature sensor. From an ambient temperature below 3°C, the auxiliary instrument sends a message via K-CAN to the junction box electronics (JBE). The JBE electrically activates the mirror heating.
Junction Box Electronics (JBE)
The JBE is responsible for the voltage supply from the exterior mirror adjustment switch, the mirror heating and the module for the exterior mirror fold-in control unit. Depending on the outside temperature, the JBE receives a signal to warm up the mirror heating. The JBE receives the signal via the K-CAN.
Position potentiometer
The mirror glass is adjusted horizontally and vertically by separate motors. The motors have a position potentiometer. The potentiometers recognize the position of the motors and return this information.
Exterior mirror fold-in control unit
The module for the exterior mirror fold-in control unit is located in the luggage compartment. The module is not capable of diagnosis and is not connected to any of the bus systems. The exterior mirror consists of a mirror base and mirror body. The motor for the exterior mirror fold-in control unit is installed in the mirror base. The mirror is folded in and out by reversing the motors direction of rotation. The module for the exterior mirror fold-in control unit is electrically supplied by the JBE. The module for the exterior mirror fold-in control unit is connected with the Dynamic Stability Control (DSC). The information from the DSC influences the folding out and in of the exterior mirrors.
System functions
The following system functions are described for the electrical exterior mirrors:
- Horizontal and vertical exterior mirror adjustment
- Exterior mirror fold-in control unit
- Automatic parking function
- Safety functions
Horizontal and vertical exterior mirror adjustment
Adjustment of the electrical exterior mirror is possible from Terminal R ON. The electrical exterior mirrors can be adjusted through the keypad in the exterior mirror adjustment switch in horizontal and vertical directions. A rotary switch switches between the driver's side and the front passenger side. It is only possible to adjust the mirror in either the horizontal or the vertical at any one time. No adjustment is possible with the exterior mirrors folded in. The adjustment time is limited to a maximum of 10 seconds to protect the motors and the mechanisms. Once the maximum adjustment time has elapsed, it is not possible to adjust the exterior mirrors for another 10 seconds.
Exterior mirror fold-in control unit
The exterior mirrors can be folded in to the side window to reduce the vehicle width. It is possible to fold in the exterior mirrors as of terminal R ON. The exterior mirrors are folded in by pressing the button for the exterior mirror adjustment switch in the driver's door. Pressing the button again after the mirror has folded in or out folds it back again in the opposite direction. An anti-repeat circuit is integrated to prevent excessively frequent folding in or out.
Automatic parking function
To improve the view of the curb, the mirror glass in the exterior mirror on the front passenger side is folded downwards when travelling in reverse. For this function, the external mirror adjustment switch must be in the driver's side position.
Safety functions
To protect the motors from overload, the motors have blocking recognition. If the drive is blocked, the current in the motor rises. The applicable control unit compares the starting current in normal operation to the current when the drive is blocked. An obstruction ('blocking') is detected by any difference in the current. The motor is no longer driven.
- Repeat interlock
To provide overheating protection for the motor, the exterior mirror fold-in function is locked after it has been working for a total of 45 seconds. If the anti-repeat circuit is active, the electric exterior mirrors can be unfolded once more.
- Undervoltage cutout
The supply voltage for the electric exterior mirrors is monitored by the junction box electronics (JBE). All electric exterior mirror functions are locked if the voltage drops below 8.5 Volts. As of an vehicle voltage of 9 Volts, the functions are available again.
We can assume no liability for printing errors or inaccuracies in this document and reserve the right to introduce technical modifications at any time.