Description Parameters

Description parameters

Battery voltage, accessory electronic module (AEM)
The value indicates the power supply to the control module.
Measurement range: 8 - 16 V.
Normal value when the generator (GEN) is charging: 13.0 - 14.5 V.

Ignition key position
The value indicates the position of the ignition key. The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Out = Key out
Position 0 = Key in the ignition switch
Position 1 = Key in position 1
Position 2 = Key in position 2
Position 3 = Key in position 3

Relay engine block heater
The value indicates the status of control module output terminal #5 for the relay for the engine block heater.
Low = Output not activated. The supply voltage is approximately 0 V and the relay is not activated.
High = Output activated. The supply voltage is approximately battery voltage and the relay is activated. The heater will start if it is connected.

Alarm, output signal P0
The value indicates the status of control module output terminal #15 for the alarm, output signal P0.
Low = Output not activated. Voltage approximately 0 V.
High = Output activated. Voltage approximately battery voltage.

Alarm, output signal P1
The value indicates the status of control module output terminal #16 for the alarm, output signal P1.
Low = Output not activated. Voltage approximately 0 V.
High = Output activated. Voltage approximately battery voltage.

Alarm, output signal S0
The value indicates the status of control module output terminal #33 for the alarm, output signal S0.
Low = Output not activated. Voltage approximately 0 V.
High = Output activated. Voltage approximately battery voltage.

Alarm, output signal S1
The value indicates the status of control module output terminal #34 for the alarm, output signal S1.
Low = Output not activated. Voltage approximately 0 V.
High = Output activated. Voltage approximately battery voltage.

Carphone mute input signal
The value indicates the status of the input on the control module for carphone accessories.
Low = The carphone mute function is active, i.e. the connected carphone is receiving a call and is transmitting a low signal. The accessory electronic module (AEM) then transmits a request to lower the sound level to 0 (mute) via the CAN network to the infotainment control module (ICM).
High = The carphone mute function is not active.

Engine running
The value indicates the status of the engine. The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Yes = Engine running
No = Engine switched off

Passenger compartment temperature
The value indicates the passenger compartment temperature. The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Measurement range: -60 to +195 °C.

Outside temperature
The value indicates the outside temperature. The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Measurement range: -128 to +127.75 °C.

Mileage
The value indicates the mileage. The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Measurement range: 0 - 1,048,575 km.

Battery voltage, central electronic module (CEM)
The value indicates the battery voltage at the central electronic module (CEM). The accessory electronic module (AEM) obtains the value via the control area network (CAN) from the central electronic module (CEM).
Measurement range: 8 - 16 V.
Normal value when the generator (GEN) is charging: 13.0 - 14.5 V.