Parking system control unit component description - GF54.65-P-5002CE

MODEL 204.0/2 with CODE (220) PARKTRONIC as of Model Year 2009 /CY 08 

MODEL 204.9 with CODE (220) PARKTRONIC as of model year 2009 

MODEL 204.0/2 with CODE (230) Advanced Parking Guidance as of model year 2012 /YoM 11 model refinement package 

MODEL 204.3 with CODE (230) Advanced Parking Guidance 

MODEL 204.9 with CODE (235) Active Park Assist as of model year 2013 /model refinement package 12 

Front passenger footwell partially disassembled, shown on model 204.0 

Location 

The parking system control unit is located at the front in the front passenger footwell under the carpet on an equipment carrier.

Task 

The parking system control unit is responsible for the following tasks:

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

Reading in of sensors 

The input factors are read in via the following connections:

• Direct line 
• Interior CAN (CAN B) (model 204.0/2 up to 28.2.11, model 204.9 up to 31.5.12) 
• Chassis CAN (CAN E) (model 204.0/2 as of 1.3.11, model 204.3, model 204.9 as of 1.6.12) 

Direct line 

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

• 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)

Interior CAN (model 204.0/2 up to 28.2.11, model 204.9 up to 31.5.12) 

The following signals are read in over the interior CAN:

• Sent by the front SAM control unit with fuse and relay module (N10/1):
  • Parking system button status (N72/1s8)
  • Light sensor status (B38/1) (without code (345) Rain sensor)
  • Rain/light sensor status (B38/2) (with code (345) Rain sensor)
  • Parking brake indicator switch status (S12)
  • Backup lamp switch status (S16/2) (for model 204.0/2 with transmission 711, 716)
  • Gear range status (with transmission 722), sent by CDI control unit (N3/9) (with diesel engine) or by ME-SFI control unit (N3/10) (with gasoline engine)
• Sent by the instrument cluster (A1):
  • Vehicle speed signal
• Sent by the trailer recognition control unit (N28/1) (with code (550) Trailer hitch):
  • "Trailer detected" status message
• Sent by the Electronic Stability Program control unit (N30/4):
  • Left front axle rpm sensor signal (L6/1)
  • Right front axle rpm sensor signal (L6/2)
  • Left rear axle rpm sensor signal (L6/3)
  • Right rear axle rpm sensor signal (L6/4)

Chassis CAN (model 204.0/2 as of 1.3.11, model 204.3, model 204.9 as of 1.6.12) 

The following information is read-in over chassis CAN:

• Sent by the front SAM control unit:
  • Status of parking brake indicator switch
  • Rain/light sensor data
  • Parking system button status
  • Status of backup lamp switch (with transmission 711, 716)
  • "Trailer detected" status message
  • Vehicle speed signal
• Sent by the CDI control unit or ME-SFI control unit:
  • Status of gear range (with transmission 722)
• Sent by the Electronic Stability Program control unit:
  • Signals of left front axle rpm sensor
  • Signals of right front axle rpm sensor
  • Signals of left rear axle rpm sensor
  • Signals of right rear axle rpm sensor
• Sent by the electrical power steering control unit (N68):
  • Signal from electric power steering torque sensor (A91b1)
• Sent by the electronic ignition lock control unit (N73):
  • Circuit 15 terminal status
• Sent by the steering column tube module control unit (N80):
  • Switch position of combination switch (S4)
  • Data from steering wheel angle sensor (N49)
  • Signal from left multifunction steering wheel button group (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.

Controlling functions 

The parking system control unit controls the following functions:

• PARKTRONIC (with code (220) PARKTRONIC)
• Parking Assist (with code (230) Exclusive Parking Assist)
• Parking Assist (with code (235) Active Parking Assist)

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• Interior CAN 
• Chassis CAN 

Direct line 

The following components are actuated via direct lines:

• Rear parking system warning indicator (A44/3)
• Instrument panel parking system warning indicator (A44/4)
• Parking system distance sensors

Interior CAN 

The following information is sent via the interior CAN:

• Parking system status indication button

Chassis CAN 

The following information is sent via the chassis CAN:

(with code (230) Exclusive Parking Assist or code (235) Active Parking Assist):

• Request to display message or output warning tone to instrument cluster
• Parking system status indication button
• Request to electric power steering

Wiring diagram for Parktronic system (PTS) control unit

PE54.65-P-2101-97FAA