PARK DISTANCE CONTROL - System Overview
For such a small ECU, with what would seem to be a fairly unimportant task, the Unknown manufacturers of this ECU, (Possibly BMW themselves) seem to have really gone to task. As can be seen from the listings of sensor data we have encountered this ECU in a wide variety of BMWs but the degree of adaptability catered for within the settings is extremely detailed and diverse.
SM056 - PARK DISTANCE CONTROL - System Help file
Version 1.27

PARK DISTANCE CONTROL - Known Fitments
Vehicle makes, models and variants known or believed to be using this vehicle system, required diagnostic lead and degree of known compatibility.

Vehicle Make Vehicle Model Vehicle Variant Diagnostic Lead
Land Rover Range Rover MK III ( L322) 2002-2009 Black OBDII Lead/LD020/LD021
BMW Mini Cooper Black OBDII Lead
Rover 25 All with PDC Black OBDII Lead
Rover 45 All with PDC Black OBDII Lead
Rover 75 All Black OBDII Lead
Rover 75 Tourer All Black OBDII Lead
Rover Streetwise All with PDC Black OBDII Lead
MG ZR All with PDC Black OBDII Lead
MG ZS All with PDC Black OBDII Lead
MG ZT All with PDC Black OBDII Lead
MG ZT-T All with PDC Black OBDII Lead
MG Express All with PDC Black OBDII Lead

PARK DISTANCE CONTROL - Physical Details

SM056 - PARK DISTANCE CONTROL - Diagnostic Capabilities (Read Fault Codes)
Reads the fault code memory. The ECU can self detect up to 18 different group problems with itself, its wiring and its associated sensors, storing the respective code together with status data if it detects any malfunction or reading outside of pre defined acceptable limits. Not all stored faults may cause the fault warning lamp to illuminate.

SM056 - PARK DISTANCE CONTROL - Diagnostic Capabilities (Clear Fault Codes)
Clears the fault code memory.

SM056 - PARK DISTANCE CONTROL - Diagnostic Capabilities (Settings)
Values, configuration settings, and other stored information which can be read from the ECU, edited and then rewritten back. Read settings can also be stored as a standard HTML page for reference. These pages can then later be re loaded and re written back to the ECU. Please note that some values may be read only due to the fact that they are supplied from the ECUs ROM or are internally calculated.

  • Part Number: This is the manufacturer's part number for the ECU.
  • Hardware Number: This is the hardware version which denotes the processor and circuit board type.
  • Software Number: This denotes the coding inside the processor for the hardware.
  • Week of Build: This is the week of the year in which the unit was built.
  • Year of Build: This is the year in which the unit was built.
  • Diagnostic Index: This is a number that indicates the diagnostic capabilities support level.
  • Bus Index: This is a number that indicates the bus communication support level, the vehicle communication buses.
  • Coding Index: This is the coding identification for the programming maps.
  • Supplier Number: This is a number which defines the supplier, using a standard look up list of supplier ECU manufacturer numbers.
  • Ignition Powered: This denotes if the system is powered all time or powered when the ignition is on, normally disabled for Range Rover.
  • One Sounder: This denotes if there is only one sounder for front and rear as opposed to 2 sounders options being ENABLED where it is one sounder and DISABLED where there are two sounders. For Range Rover is DISABLED.
  • PDC Switch: This denotes if there is a park distance control switch which allows the system to be manually deactivated or not.
  • Reversing Signal: This denotes if there is a signal when reversing, normally ENABLED.
  • Activation Delay: This denotes if there is a small delay after the system is active.
  • Number of Sensors Fitted: The numbers of sensors fitted to the entire vehicle. There are 8 sensors fitted on the Range Rover.
  • Active on Ignition: This denotes if the system is enabled (turned on) automatically whenever the ignition is switched on, normally DISABLED.
  • Deactivation: This denotes if the system can be turned off.
  • Audible Switch on First: When enabled, you will get an audible beep to tell you that the PDC is on only when you first switch it on.
  • Audible Switch on Always: When enabled, means that you get a constant regular beep from the front to denote that the PDC is on.
  • Audible Switch off: This denotes that you get a beep to notify that you have switched the PDC off or that the PDC is switching itself off.
  • Signal by Switch: options of ENABLED or DISABLED - normally this is enabled for the Range Rover.
  • Emergency Signal: this gives a noise notification in the event of a failure on the system, normally DISABLED for the Range Rover.
  • Ice Suppression: This denotes if a PDC requires to make a noise that it mutes or partially mutes the audio system.
  • Switch Functions: This changes the operationally of the PDC switch from being switching on and off permanently to switching on and off for the drive cycle. So that when the PDC is switched off it remains switched off for the entire ignition cycle for off road capability usage. For BMW this is disabled and enabled for the Range Rover.
  • Sensor Spacing Rear Corner to Rear Centre: This is a specific value for the configuration within the bumper of the spaces.
  • Sensor Spacing between Rear Centre: This is a specific value for the configuration within the bumper of the spaces.
  • Sensor Spacing Front Corner to Front Centre: This is a specific value for the configuration within the bumper of the spaces.
  • Sensor Spacing between Front Centre: This is a specific value for the configuration within the bumper of the spaces.
  • SENSOR SPACING VALUES
    Vehicle Type Sensor Spacing Rear Sensor Spacing Front
      Corner-Middle Middle-Middle Corner-Middle Middle-Middle
    BMW 7 series 49 60 62 66
    BMW 5 series 43 60 45 62
    BMW 5 series /2 46 56 45 62
    BMW 5 series Motosport 43 60 34 78
    BMW 3 series Limousine (except SA715 and Touring) 43 46 0 0
    BMW 3 series sport Limousine, SA715 38 46 0 0
    BMW 3 series /2 43 46 0 0
    BMW 3 series Motosport 40 46 0 0
    BMW 3 series Compact 45 52 0 0
    BMW X5 44 61 56 60
    Mini Cooper 45 45 44 60
    Rover 75 39 50 0 0
    Range Rover 45 50 49 70
  • Max Detect Area Rear Corner: This is a specific value for the configuration within the bumper of the spaces.
  • Max Detect Area Rear Corner: This is a specific value for the configuration within the bumper of the spaces.
  • Max Detect Area Rear Corner: This is a specific value for the configuration within the bumper of the spaces.
  • Max Detect Area Rear Corner: This is a specific value for the configuration within the bumper of the spaces.
    MAXIMUM DETECTION AREA
    Vehicle Type Corner Rear Centre Rear Corner Front Centre Front
    BMW 7 series, 5 series 60 150 60 70
    BMW 3 series 60 150 0 0
    BMW X5 60 150 60 80
    Mini Cooper 60 150 60 70
    Rover 75 60 150 0 0
    Range Rover 60 150 70 100
  • Offset rear corner: Offset from rear corner to rear centre, this is a specific value for the configuration within the bumper of the spaces.
  • Offset rear centre: Offset between rear centre, this is a specific value for the configuration within the bumper of the spaces.
  • Offset front corner: Offset from front corner to front centre, this is a specific value for the configuration within the bumper of the spaces.
  • Offset front centre: Offset between front centre, this is a specific value for the configuration within the bumper of the spaces.
    OFFSETS
    Vehicle Type Corner Rear Centre Rear Corner Front Centre Front
    BMW 7 series, 5 series 0 0 0 0
    BMW 3 series Limousine, Touring, Coupe, Cabrio, Compact 5 5 0 0
    BMW 3 series Motorsport 0 0 0 0
    BMW X5 6 5 3 1
    Rover 75, Mini Cooper 0 0 0 0
    Range Rover 2 1 2 1
  • Permanent Tone Front: This is a value which denotes the pitch of the tone on the front.
  • Permanent Tone Rear: This is a value which denotes the pitch of the tone for the rear.
    Vehicle Type Permanent Tone Front Permanent Tone Rear
    BMW 7 series, 5 series, 3 series 25 25
    BMW X5 35 30
    Mini Cooper, Land Rover 30 30
    Rover 75 35 0
  • Range Trunk Corner: This is only used in the event of vehicles which have some overhang from the boot. This value is not used for Land Rovers - only used for BMW.
    Vehicle Type Value
    BMW 7 series, 5 series, 3 series, X5, Mini Cooper, Rover 75, Land Rover 0
    BMW 5 series / 2 5
  • Range Trunk Centre: This is only used in the event of vehicles which have some overhang from the boot. This value is not used for Land Rovers - only used for BMW.
  • Vehicle Type Value
    BMW 7 series, 5 series, 3 series, X5, Mini Cooper, Rover 75, Land Rover 0
    BMW 5 series / 2 12
  • Rear Volume: This a numerical value between 2 and 7 with 4 being the normal for a Range Rover. The rear volume only works in Speaker Mode.
  • Rear Sounder: Choice of speaker or gong.
  • Front Volume: This a numerical value between 2 and 7 with 4 being the normal for a Range Rover.
  • Vehicle Type Value
    BMW 7 series, 5 series, 3 series, X5, Rover 75, Land Rover 2
    Mini Cooper 7
  • Front Sounder: Select the type of the front sounder, either speaker or gong.
  • Towball Distance: This denotes if the towball is installed or not installed.
  • Speed Switch On: This is a speed below which the Park Distance Control system will switch on. This is a numerical value not known to be equivalent to certain kilometres/miles per hour, only relationate.
  • Speed Switch Off: This is a speed below which the Park Distance Control system will switch off. This is a numerical value not known to be equivalent to certain kilometres/miles per hour only relationate
  • .
    Vehicle Type Value
    BMW 7 series, 5 series, 3 series, Mini Cooper, Rover 75, Land Rover 30
    BMW X5 20
  • Switch off Distance: This is a value which relates to a distance after which the Park Distance Control system will switch off.
    Vehicle Type Value
    BMW 7 series, 5 series, 3 series, X5, Land Rover 50
    Mini Cooper, Rover 75 30
  • Speed Signal: This is a value which relates to the interpretation of the speed pulses coming in to the unit and is a set value depending on the vehicle type. This is 140 for Land Rover.
    Vehicle Type Value
    BMW 7 series, 5 series, 3 series, X5, Rover 75, Land Rover 140
    Mini Cooper 136
  • Towball Hook Distance: This is a value related to the actual physical dimensions of the fitted towball. when the towball is fitted certain numerical distances are set for different vehicles. It is 0 for the Range Rover and for other vehicles.
  • Rear Corner Response Values: This is a predetermined set of values which set a map contour configuration for the rear corner sensors.
  • Vehicle Type Value
    BMW 7 series 19,19,18,14,14,16,15,14,14,13,10,0E
    BMW 7 series / 3 19,19,18,14,16,18,14,14,14,14,12,0F
    BMW 5 series 19,19,18,17,17,16,15,13,12,12,11,11
    BMW 5 series / 2 14,14,13,1E,1E,1E,1E,18,11,0D,0C,0C
    BMW 5 series Motorsport 19,19,18,17,17,16,15,13,12,12,11,11
    BMW 3 series Limousine, Touring 1E,1E,1F,1F,1F,1D,1C,17,11,0F,0C,0A
    BMW 3 series Coupe, Cabrio 1E,1E,1F,1F,1F,1D,1C,18,12,0F,0C,0A
    BMW 3 series Motorsport, Compact 19,19,18,17,17,16,15,13,12,12,11,11
    BMW X5 19,19,1D,1F,1F,1F,1C,1B,19,16,12,10
    Mini Cooper 14,19,1D,1D,1C,1A,1A,17,15,12,0F,0E
    Mini Cooper S 0F,13,1A,1A,19,18,17,16,11,0D,0C,0B
    Rover 75 0F,11,15,17,17,15,14,12,10,0D,0A,08
    Land Rover 13,15,17,19,19,19,19,1A,19,18,17,15
  • Scale Start Value: This is either set to 100% or to use the scale to reduce the response of the rear corner sensors.
  • Scale Value: When the scale start value is set to use the scale this is the percentage reduction scale that will be in force for the rear corner sensors.
  • Rear Centre Response Values: This is a predetermined set of values which set a map contour configuration for the rear centre sensors.
  • Vehicle Type Value
    BMW 7 series 19,19,18,14,14,16,15,14,14,13,10,0E
    BMW 7 series / 3 19,19,18,14,16,18,14,14,14,14,12,0F
    BMW 5 series 19,19,18,17,17,16,15,13,12,12,11,11
    BMW 5 series / 2 14,14,19,1C,1D,1D,1D,18,15,13,11,0F
    BMW 5 series Motorsport 19,19,18,17,17,16,15,13,12,12,11,11
    BMW 3 series Limousine, Touring 1E,1E,1F,1F,1F,1D,1C,17,11,0F,0C,0A
    BMW 3 series Coupe, Cabrio 1E,1E,1F,1F,1F,1D,1C,18,12,0F,0C,0A
    BMW 3 series Motorsport, Compact 19,19,18,17,17,16,15,13,12,12,11,11
    BMW X5 19,19,1D,1F,1F,1F,1C,1B,1B,18,16,15
    Mini Cooper 14,19,1D,1D,1C,1A,1A,17,15,12,0F,0E
    Mini Cooper S 0F,13,1A,1A,19,18,17,16,11,0D,0C,0B
    Rover 75 0F,11,14,16,16,14,12,11,0F,0C,0A,08
    Land Rover 13,15,17,19,19,19,19,1A,19,18,17,15
  • Scale Start Value: This is either set to 100% or to use the scale to reduce the response of the rear centre sensors.
  • Scale Value: When the scale start value is set to use the scale this is the percentage reduction scale that will be in force for the rear centre sensors.
  • Front Corner Response Values: This is a predetermined set of values which set a map contour configuration for the front corner sensors.
    Vehicle Type Value
    BMW 7 series 19,19,18,17,18,19,17,16,14,12,10,0D
    BMW 7 series / 3 19,19,18,13,15,16,13,13,13,12,12,0F
    BMW 5 series 14,16,1C,1E,1E,1D,1B,18,12,0D,0B,0A
    BMW 5 series / 2 14,16,1C,1E,1E,1D,1B,18,12,0D,0B,0A
    BMW 5 series Motorsport 14,16,1C,1E,1E,1D,1B,18,12,0D,0B,0A
    BMW 3 series 00,00,00,0,00,00,00,00,00,00,00,00
    BMW X5 19,19,19,1C,1E,1D,1C,1A,16,11,11,11
    Mini Cooper 14,19,1C,1C,1C,1A,19,18,16,14,13,12
    Mini Cooper S 0F,19,1F,1F,1D,1A,18,16,13,10,0F,0E
    Rover 75 00,00,00,00,00,00,00,00,00,00,00,00
    Land Rover 0F,10,14,18,1A,1B,1A,19,16,0D,0B,09
  • Scale Start Value: This is either set to 100% or to use the scale to reduce the response of the front corner sensors.
  • Scale Value: When the scale start value is set to use the scale this is the percentage reduction scale that will be in force for the front corner sensors.
  • Front Centre Response Values: This is a predetermined set of values which set a map contour configuration for the front centre sensors.
    Vehicle Type Value
    BMW 7 series 19,19,18,17,18,19,17,16,14,12,10,0D
    BMW 7 series / 3 19,19,18,13,15,16,13,13,13,12,12,0F
    BMW 5 series 14,16,1C,1E,1E,1D,1B,18,12,0D,0B,0A
    BMW 3 series 00,00,00,00,00,00,00,00,00,00,00,00
    BMW X5 1F,1F,19,1B,1D,1D,1C,1A,16,11,11,11
    Mini Cooper 14,19,1C,1C,1C,1A,19,18,16,14,13,12
    Mini Cooper S 0F,19,1F,1F,1A,17,16,15,12,0D,0D,0D
    Rover 75 00,00,00,00,00,00,00,00,00,00,00,00
    Land Rover 0F,10,14,18,1A,1B,1A,19,16,0D,0B,09
  • Scale Start Value: This is either set to 100% or to use the scale to reduce the response of the front corner sensors.
  • Scale Value: When the scale start value is set to use the scale this is the percentage reduction scale that will be in force for the front corner sensors.
  • Coding Data: A specific block of programmable data stored in the ECU to control its functionality for specific variations of vehicle. There are a number of hexadecimal digits, each digit separated by a comma. Re-entered parameters should be entered in an identical format to that which is read. Changing this values can produce unknown alteration in the functionality of the ECU, damage the ECU or even damage your car.

SM056 - PARK DISTANCE CONTROL - Diagnostic Capabilities (Inputs)
Realtime live display of the information the electronic control unit of the selected vehicle system is currently deriving from its input sensors.

  • PDC select button: Denotes if the PDC button on the dashboard is pressed of not.
  • Road Speed: The current road speed in miles per hour.
  • Road Speed: The current road speed in kilometres per hour.
  • Rear Left Corner Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the rear left corner sensor.
  • Rear Left-Centre Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the left-centre sensor.
  • Rear Right-Centre Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the right-centre sensor.
  • Rear Right Corner Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the right corner sensor.
  • Front Left Corner Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the front left corner sensor.
  • Front Left-Centre Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the left-centre sensor.
  • Front Right-Centre Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the right-centre sensor.
  • Front Right Corner Sensor: This is a numerical value for centimetres from 0 to 255 for the reflected signal for the right corner sensor.

SM056 - PARK DISTANCE CONTROL - Diagnostic Capabilities (Outputs)
  • PDC: This can be turned on or off.
  • Rear sounder: This can be turned on or off - this is permanent tone.
  • Front sounder: This can be turned on or off - this is permanent tone.
  • PDC Switch Indicator Lamp: This can be turned on or off.