Air Body Control Unit, Component Description - GF32.22-P-5111FG

Model 213 

up to model year 2021 

with code 489 (AIR BODY CONTROL) 

Left view of vehicle 

Location 

The AIR BODY CONTROL unit and the AIR BODY CONTROL Plus control unit are located in the left rear of the trunk.

Tasks 

The AIR BODY CONTROL unit and the AIR BODY CONTROL Plus control unit have the following tasks:

• Reading in of signals 
• Evaluation of input factors 
• Actuation of components 
• Sending signals 

Reading in of signals 

The input factors are read in via the following connections:

• Direct line 
• Suspension FlexRay (Flex E) 

Direct line 

The AIR BODY CONTROL unit reads in the signals from the following components via direct lines:

• Left rear level sensor (B22/7)
• Left front level sensor (B22/8)
• Right front level sensor (B22/9)
• Right rear level sensor (B22/10)
• Front left body acceleration sensor (B24/3) (model 213.0 (except 213.016/053) up to model year 2018, model 213.016/053/1/2 up to model year 2019)
• Front right body acceleration sensor (B24/4) (model 213.0 (except 213.016/053) up to model year 2018, model 213.016/053/1/2 up to model year 2019)
• Rear left body acceleration sensor (B24/5) (model 213.0 (except 213.016/053) up to model year 2018, model 213.016/053/1/2 up to model year 2019)
• AIR BODY CONTROL pressure sensor (Y36/6b1) (model 213.217/227/237, model 213.0 (except 213.016/053) up to model year 2018, model 213.016/053/1/2 (except 213.217/227/237) up to model year 2019)

Chassis FlexRay 

The AIR BODY CONTROL unit also reads in the following signals via chassis FlexRay:

• Atmospheric pressure
• Intake air temperature
• Wheel speed
• Displayed vehicle speed
• Turn rate, lateral acceleration and longitudinal acceleration
• Brake torque
• Status of service brake
• Transmission mode, request
• Status of vehicle level button (N72/4s2) (automatic transmission, except engine 177, 256, 276)
• Status of engine operation

The AIR BODY CONTROL Plus control unit receives information and requests from AIR BODY CONTROL unit via chassis FlexRay.

Evaluation of input factors 

The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.

Actuation of components 

The AIR BODY CONTROL unit actuates the following components via direct lines:

• AIR BODY CONTROL pressure relief valve (A9/1y1)
• AIR BODY CONTROL relay (K40/8kR)
• Left front level control valve (Y36/6y1)
• Right front level control valve (Y36/6y2)
• Left rear level control valve (Y36/6y3)
• Right rear level control valve (Y36/6y4)
• AIR BODY CONTROL pressure reservoir filling valve (Y36/6y5) (model 213.217/227/237, model 213.0 (except 213.016/053) up to model year 2018, model 213.016/053/1/2 (except 213.217/227/237) up to model year 2019)
• Left front axle damping valve unit (Y51)
  • Solenoid valve 1, left front (Y51 y1)
  • Solenoid valve 2, left front (Y51 y2)
• Right front axle damping valve unit (Y52)
  • Solenoid valve 1, right front (Y52y1)
  • Solenoid valve 2, right front (Y52y2)
• Left rear axle damping valve unit (Y53)
  • Solenoid valve 1, left rear (Y53y1)
  • Solenoid valve 2, left rear (Y53y2)
• Right rear axle damping valve unit (Y54)
  • Solenoid valve 1, right rear (Y54y1)
  • Solenoid valve 2, right rear (Y54y2)

The AIR BODY CONTROL Plus control unit actuates the following components via direct lines:

• Left front axle air suspension valve unit (Y51/2)
  • Air suspension valve 1, left front (Y51/2y1)
  • Air suspension valve 2, front left (Y51/2y2)
• Right front axle air suspension valve unit (Y52/2)
  • Air suspension valve 1, front right (Y52/2y1)
  • Air suspension valve 2, front right (Y52/2y2)
• Left rear axle air suspension valve unit (Y53/2)
  • Air suspension valve 1, rear left (Y53/2y1)
  • Air suspension valve 2, rear left (Y53/2y2)
• Right rear axle air suspension valve unit (Y54/2)
  • Air suspension valve 1, rear right (Y54/2y1)
  • Air suspension valve 2, rear right (Y54/2y2)

Sending signals 

The AIR BODY CONTROL unit also sends the following signals via chassis FlexRay:

• Fault message, request
• System and warning messages, request
• Actuation of air suspension valves, request

The AIR BODY CONTROL Plus control unit sends the status of air suspension valves to the AIR BODY CONTROL unit via chassis FlexRay.

Wiring diagram for AIR BODY CONTROL unit

PE32.32-P-2102-97DBA