GF00.20-D-0003-03HD Active Service System (ASSYST), Block Diagram

GF00.20-D-0003-03HD Active Service System (ASSYST), Block Diagram

Shown with engine 642 and with code (JK3) High-end instrument cluster with speedometer in km







A1 Instrument cluster
B11 Coolant temperature sensor
B40 Engine oil sensor
L5 Crankshaft 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
N3/20 CDI control unit
N30/4 ESP control unit
CAN-C Controller Area Network, bus Class C (engine compartment) (CAN-C)

Networking of components
The components below are read in by the CDI control unit, with engine 642:
- Engine oil sensor
- Coolant temperature sensor
- Crankshaft sensor

The components below are read in by the CDI control unit (N3/21), with engine 646:
- Engine oil sensor (B40/5)
- Coolant temperature sensor
- Crankshaft sensor (L5/7)

The components below are read in by the CDI control unit (N3/28), with engine 651:
- Engine oil level sensor (B40/6) with integrated engine oil temperature sensor (B40/9)
- Coolant temperature sensor (B11/17)
- Crankshaft sensor (L5/10)

Then the CDI control unit places the following messages on CAN C:
- "T_OEL (oil temperature)", "OEL_FS (oil level)" und "OEL_QUAL (oil quality)"
- "T_MOT (engine coolant temperature)"
- "NMOT (engine speed)"

The ESP control unit reads in the data of the following components:
- Left front rpm sensor
- Right front rpm sensor
- Left rear rpm sensor
- Right rear rpm sensor

The ESP control unit uses the pulses to determine the wheel speeds and places the corresponding messages (e.g. "RV_ST_DVL (left front wheel speed)") on the CAN-C. The instrument cluster receives these messages and uses them to determine the vehicle speed and the distance traveled.