As series standard, electrical exterior mirrors are fitted on the E70. The exterior mirrors are adjusted centrally using the mirror-adjustment switch in the driver's door. The electrical exterior mirrors are offered in two equipment variations (Low and High).
The following components are described for the electrical exterior mirrors:
The electrical exterior mirrors are adjusted using the exterior mirror-adjustment switch in the driver's door. With the equipment specification ”Low”, the mirror-adjustment switch directly activates the motors of the electrical exterior mirrors. With the equipment specification ”High”, the control signals are transferred across the LIN bus to the footwell module (FRM) and the electrical exterior mirrors.
The outdoor temperature sensor picks up the ambient temperature. The outdoor temperature sensor sends this information directly to the instrument cluster.
The instrument cluster processes the information from the outdoor temperature sensor. As of an ambient temperature less than 3 °C, the instrument cluster sends a message across the K-CAN to the control unit responsible. With the equipment specification ”Low”, the message is sent to the junction box electronics (JBE). In response, the JBE activates the mirror heating electrically. With the equipment specification ”High”, the message is sent to the footwell module (FRM). The FRM reports this via the LIN bus to the electrical exterior mirrors.
The FRM handles the light of the mirror-adjustment switch. With the equipment specification ”High”, the FRM is connected across the LIN bus with the exterior mirror-adjustment switch and the electrical exterior mirrors.
The JBE is responsible for the power supply of the electrical exterior mirrors and the exterior mirror-adjustment switch. With the equipment specification ”Low”, the JBE activates the mirror heating electrically. Depending on the outside temperature, the JBE receives a signal to heat up the mirror heating. The JBE receives the signal through the K-CAN.
The mirror glass is adjusted horizontally and vertically by separate motors. There is a position potentiometer on the motors. The potentiometer detects the position of the motors and returns this.
The exterior mirror consists of a mirror base and mirror body. The motor for exterior mirror folding is installed in the mirror base. The mirror is folded in and out by reversing the motor's direction of rotation.
The graphic shows the E70
Index |
Explanation |
Index |
Explanation |
|---|---|---|---|
1 |
Exterior mirror-adjustment switch |
2 |
Slide switch for side selection |
3 |
Button for exterior mirror folding |
|
|
Block circuit diagram E70, equipment specification ”Low”
Index |
Explanation |
Index |
Explanation |
|---|---|---|---|
1 |
Outside temperature sensor |
2 |
Instrument cluster |
3 |
Footwell module (FRM) |
4 |
Junction box electronics (JBE) |
5 |
Exterior mirror on passenger side |
6 |
Exterior mirror-adjustment switch |
7 |
Exterior mirror on driver's door |
|
|
Block circuit diagram E70, equipment specification ”High”
Index |
Explanation |
Index |
Explanation |
|---|---|---|---|
1 |
Outside temperature sensor |
2 |
Instrument cluster |
3 |
Footwell module (FRM) |
4 |
Exterior mirror on passenger side |
5 |
Exterior mirror-adjustment switch with exterior mirror folding switch |
6 |
Exterior mirror on driver's door |
The following system functions are described for the electrical exterior mirrors:
It is possible to adjust the electrical exterior mirrors from terminal R ON. The electrical exterior mirrors can be adjusted horizontally and vertically using the button pad in the mirror-adjustment switch. A slide 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.
To reduce the vehicle width, the exterior mirrors can be folded in towards the side window. It is possible to fold the exterior mirrors from terminal R ON. Folding in the exterior mirrors is triggered by pressing the button for exterior mirror folding 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.
The automatic parking function is only available in conjunction with the ”Driver's mirror memory” optional extra. To improve the view of the kerb when reversing, the mirror glass of the exterior mirror on the front-passenger side is folded downwards. This function can only be performed under the following conditions:
The motors have a blockage detection to provide overload protection for the drives. If the drive is blocked, the current in the motor rises. Each control unit compares the current when a drive is blocked with the starting current in normal operating mode. An obstruction is detected by any difference in the current. The motor is no longer driven.
No liability can be accepted for printing or other errors. Subject to changes of a technical nature