Parking System Control Unit, Component Description - GF54.65-P-5002LF

Model 217 

up to model year 2018 

Model 222 

up to model year 2018 

with code 235 (Parking Pilot with PARKTRONIC) 

Shown model 222.0 

Location 

The parking system control unit is located on the left in the trunk behind the seat backrest of the rear seat.

Tasks 

The parking system control unit has the following tasks:

• Controlling functions 
• Reading in of sensors 
• Evaluation of input factors 
• Actuation of components 
• Sending signals 

Controlling functions 

The parking system control unit controls the Active Parking Assist function.

Reading in of sensors 

The input factors are read in over the following connections:

• Direct line 
• Suspension FlexRay (Flex E) 

Direct line 

The signals from the following components are read via direct lines:

• Rear parking system display (A44/3)
• Outer left front parking system distance sensor (B8/1)
• Center left front parking system distance sensor (B8/2)
• Inner left front parking system distance sensor (B8/3)
• Inner right front parking system distance sensor (B8/4)
• Center right front parking system distance sensor (B8/5)
• Outer right front parking system distance sensor (B8/6)
• Outer right rear parking system distance sensor (B8/7)
• Inner right rear parking system distance sensor (B8/8)
• Inner left rear parking system distance sensor (B8/9)
• Outer left rear parking system distance sensor (B8/10)
• Center left rear parking system distance sensor (B8/11)
• Center right rear parking system distance sensor (B8/12)

Chassis FlexRay 

The following signals, among others, are read in via chassis FlexRay:

• Vehicle speed
• Drive position status
• Status from rain/light sensor with additional functions (B38/2)
• Parking system button status (S6/1s3)
• Status of Electronic Stability Program control unit (N30/4)
• Wheel speeds and wheel rotation direction
• Electrical power steering control unit status (N68)
• Electric power steering torque sensor (A91b1) signal (toothed rack position)
• Terminal 15 status
• Switch position of combination switch (S4)
• Left multifunction steering wheel button group signal (S110)

Evaluation of input factors 

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

Actuation of components 

The following components are actuated via direct lines:

• Rear parking system indicator
• Parking system distance sensors

Sending signals 

The parking system control unit also sends the following signals via the suspension FlexRay:

• Request for parking system display in instrument cluster (A1)
• Request to display message or issue warning tone
• Request for parking system status display
• Electric power steering request (steering angle)
• Information on distance to obstacle (remaining distance to obstacle)

Wiring diagram for Parktronic system (PTS) control unit

PE54.65-P-2101-97SEA