Maintenance Required Lamp/Indicator: Diagrams

GF00.20-P-0003-07R Active Service System (ASSYST), Networking Of Components

Networking







A1 Instrument cluster (with integrated ASSYST computer and timer)
A1p13 Left multifunction display
A1p15 Right multifunction display
A7/3n1 SBC control unit
B11/4 Coolant temperature sensor
B40 Oil sensor (oil level, temperature and quality)
CAN-C Engine compartment CAN
SBC CAN Communication between SBC control unit (A7/3n1) and ESP, SPS [PML] and BAS control unit (N47-5)
L5 Crankshaft position sensor
L6/1 Left front rpm sensor
L6/2 Right front rpm sensor
L6/3 Left rear rpm sensor
L6/4 right rear rpm sensor
N3/10 ME-SFI [ME] control unit
N47-5 ESP, SPS [PML] and BAS control unit

Networking
- The oil sensor (oil level, temperature and quality B40) is read in by the ME-SFI control unit (N3/10). The "oil level", oil temperature and oil condition (oil quality) values are sent to the engine compartment CAN by the ME-SFI control unit (N3/10) in the form of a message.
- The coolant temperature sensor (B11/4) is read in the ME-SFI control unit (N3/10). The temperature value is sent to the engine compartment CAN in the form of a message.
- The crankshaft position sensor (L5) is read in by the ME-SFI control unit (N3/10). The ME-SFI control unit (N3/10) calculates the engine speed from the sensor pulses and sends an appropriate message to the engine compartment CAN.
- The four wheel speed signals (L6/1, L6/2, L6/3, L6/4) are read in by the SBC control unit (A7/3n1). The SBC control unit SBC (A7/3n1) places the four wheel speed signals on the engine compartment CAN via the ESP control unit (N47-5). The instrument cluster (A1) receives these messages and uses them to determine the vehicle speed and the distance traveled.