Central locking
See CENTRAL LOCKING (2005-2006) .
Scheme 553
The inclination sensor module (ISM) is on the left-hand side of the rear relay box.
The inclination sensor module (ISM) is powered from the rear electronic module (REM), which both activates and deactivates it. Information is transferred from the inclination sensor module (ISM) to the rear electronic module (REM) using serial communication.
The inclination sensor module (ISM) detects when the angle of the vehicle changes. If the angle changes when the vehicle is alarmed, a signal is transmitted to the rear electronic module (REM) which sends this information out on the controller area network (CAN) to activate the alarm.
There are diagnostics for the Inclination Sensor Module (ISM).
Scheme 554
Cars with Bi-Xenon lamps have a position sensor so that the headlamps can automatically adjust beam length. The vertical adjustment accounts for load and road conditions to reduce the risk of dazzle.
The position sensor is beside the rear axle and is connected to the left-hand rear control arm by a linkage system. This linkage system affects the sensor, allowing the angle of the car to be gauged.
The position sensor is directly connected to the rear electronic module (REM) via three inputs. Two are used for the power supply and ground connection for the sensor. One input is used for signals about the angle of the car. The signals are received by the rear electronic module (REM) which sends them onwards via the Control area network (CAN) to the central electronic module (CEM) which controls the headlamp range adjustment function.
The position sensor can be calibrated using VIDA. The calibration is saved in the rear electronic module (REM) and must be carried out again if the rear electronic module (REM) or position sensor is replaced.
There are diagnostics for the position sensor.
Scheme 555
The rear fog lamp are in the tail lamps. The fog lamps are operated via a button in the light switch module (LSM). An LED in the button lights when the fog lamps are activated. The rear fog lamp can only be activated when low beam is on (market dependent). The light switch transmits information to the central electronic module (CEM) using serial communication when the button for the rear fog lamp is pressed. The central electronic module (CEM) transmits the data via the Controller area network (CAN) to the rear electronic module (REM). The power supply for the lamps is via a directly connected relay in the rear electronic module (REM).
When reactivating key position II, the function is set to non-activated mode.
To detect faults in the rear fog lamps, the rear electronic module (REM) reads the power consumption of the circuit. If the power consumption falls below a certain limit, a fault is indicated and a text message is displayed in the driver information module.
Scheme 556
There are a number of lamps positioned around the car to mark its position. These are in the headlamps and tail lamps. The lamps light together with the license plate lighting when the light switch module (LSM) is in parking lamp mode or low beam is on.
The rear parking lamps and license plate lighting are powered by the rear electronic module (REM).
The front parking lamps are powered by the central electronic module (CEM). For further information, see CENTRAL ELECTRONIC MODULE (CEM) (2005-2006) .
There are diagnostics for the rear parking lamps and license plate lighting.