GF80.20-P-0005CE Central Locking CL (ZV), Function

GF80.20-P-0005CE Central Locking (CL [ZV]), Function
MODEL 204.0 /2 as of model year 2009 /YoM 08
MODEL 204.3
MODEL 204.9





Vehicle up to 30.11.09
A1 Instrument cluster
A1h1 Warning buzzer
A2/18 FM, AM and CL antenna amplifier (model 204.0)
A2/71 Antenna amplifier 1, rear window (model 204.2/9)
A8/1 Transmitter key
A26/1 Driver-side front door infrared remote control receiver
A85 Left front door lock
A85m1 Left front door central locking motor
A85m4 Left front door additional door lock actuator motor (with code (885) Extended theft protection)
A85s1 Left front door rotary tumbler switch
A85/1 Right front door lock
A85/1m1 Right front door central locking motor
A85/1m4 Right front door additional door lock actuator motor (with code (885) Extended theft protection)
A85/1s1 Right front door rotary tumbler switch
A85/3 Left rear door lock
A85/3m1 Left rear door central locking motor
A85/3m4 Left rear door additional door lock actuator motor (with code (885) Extended theft protection)
A85/3s1 Left rear door rotary tumbler switch
A85/4 Right rear door lock
A85/4m1 Right rear door central locking motor
A85/4m4 Right rear door additional door lock actuator motor (with code (885) Extended theft protection)
A85/4s1 Right rear door rotary tumbler switch
M14/7 Trunk lid central locking motor (model 204.0) liftgate central locking motor (model 204.2/9)
M14/7s1 Trunk lid rotary tumbler switch (model 204.0) Liftgate rotary tumbler switch (model 204.2/9)
M14/10 Tank cap central locking motor
N2/10 Supplemental restraint system control unit
N10/1 Front SAM control unit with fuse and relay module
N10/2 Rear SAM control unit with fuse and relay module
N69/1 Left front door control unit
N69/2 Right front door control unit
N69/3 Left rear door control unit
N69/4 Right rear door control unit
N73 Electronic ignition switch control unit
S15/1 Trunk lid unlock button (on model 204.0)
S15/3 Trunk lid/liftgate control button, driver (on model 204.2/9 with code (890) EASY-PACK liftgate)
S85/5 Left front door central locking interior switch
S85/6 Right front door central locking interior switch
S88/6 Trunk lid contact switch (on model 204.0 with code (887) Valet Parking)
S88/8 Trunk lid external operation switch (model 204.0) liftgate external operation switch (model 204.2/9)
S88/10 Trunk lid emergency opening switch (on model 204.0 with code (494) USA version)
CAN B Interior CAN
CAN E Chassis CAN





Vehicle as of 1.12.09 up to 31.5.10
A1 Instrument cluster
A1h1 Warning buzzer
A2/18 FM, AM and CL antenna amplifier (model 204.0)
A2/71 Antenna amplifier 1, rear window (model 204.2/9)
A8/1 Transmitter key
A26/1 Driver-side front door infrared remote control receiver
A85 Left front door lock
A85m1 Left front door central locking motor
A85m4 Left front door additional door lock actuator motor (with code (885) Extended theft protection)
A85s1 Left front door rotary tumbler switch
A85/1 Right front door lock
A85/1m1 Right front door central locking motor
A85/1m4 Right front door additional door lock actuator motor (with code (885) Extended theft protection)
A85/1s1 Right front door rotary tumbler switch
A85/3 Left rear door lock
A85/3m1 Left rear door central locking motor
A85/3m4 Left rear door additional door lock actuator motor (with code (885) Extended theft protection)
A85/3s1 Left rear door rotary tumbler switch
A85/4 Right rear door lock
A85/4m1 Right rear door central locking motor
A85/4m4 Right rear door additional door lock actuator motor (with code (885) Extended theft protection)
A85/4s1 Right rear door rotary tumbler switch
M14/7 Trunk lid central locking motor (model 204.0) liftgate central locking motor (model 204.2/9)
M14/7s1 Trunk lid rotary tumbler switch (model 204.0) Liftgate rotary tumbler switch (model 204.2/9)
M14/10 Tank cap central locking motor
N2/10 Supplemental restraint system control unit
N10/1 Front SAM control unit with fuse and relay module
N10/2 Rear SAM control unit with fuse and relay module
N69/1 Left front door control unit
N69/2 Right front door control unit
N69/3 Left rear door control unit
N69/4 Right rear door control unit
N73 Electronic ignition switch control unit
S15/1 Trunk lid unlock button (on model 204.0)
S15/3 Driver trunk lid/liftgate control button (on model 204.2/9 with code (890) EASY-PACK liftgate)
S85/5 Left front door central locking interior switch
S85/6 Right front door central locking interior switch
S88/6 Trunk lid contact switch (on model 204.0 with code (887) Valet Parking)
S88/8 Trunk lid external operation switch (model 204.0) liftgate external operation switch (model 204.2/9)
S88/10 Trunk lid emergency opening switch (on model 204.0 with code (494) USA version)
CAN B Interior CAN
CAN E Chassis CAN





Vehicle as of 1.6.10
A1 Instrument cluster
A1h1 Warning buzzer
A2/18 FM, AM and CL antenna amplifier (model 204.0/3)
A2/71 Antenna amplifier 1, rear window (model 204.2/9)
A8/1 Transmitter key
A26/1 Driver-side front door infrared remote control receiver
A85 Left front door lock
A85m1 Left front door central locking motor
A85m4 Left front door additional door lock actuator motor (with code (885) Extended theft protection)
A85s1 Left front door rotary tumbler switch
A85/1 Right front door lock
A85/1m1 Right front door central locking motor
A85/1m4 Right front door additional door lock actuator motor (with code (885) Extended theft protection)
A85/1s1 Right front door rotary tumbler switch
A85/3 Left rear door lock (on model 204.0/2/9)
A85/3m1 Left rear door central locking motor (on model 204.0/2/9)
A85/3m4 Left rear door additional door lock actuator motor (on model 204.0/2/9 with code (885) Increased theft protection)
A85/3s1 Left rear door rotary tumbler switch (on model 204.0/2/9)
A85/4 Right rear door lock (on model 204.0/2/9)
A85/4m1 Right rear door central locking motor (on model 204.0/2/9)
A85/4m4 Right rear door additional door lock actuator motor (on model 204.0/2/9 with code (885) Increased theft protection)
A85/4s1 Right rear door rotary tumbler switch (on model 204.0/2/9)
H2 Left fanfare horn
H2/1 Right fanfare horn
M14/7 Trunk lid central locking motor (model 204.0/3) liftgate central locking motor (model 204.2/9)
M14/7s1 Trunk lid rotary tumbler switch (model 204.0/3) Liftgate rotary tumbler switch (model 204.2/9)
M14/10 Tank cap central locking motor
N2/10 Supplemental restraint system control unit
N10/1 Front SAM control unit with fuse and relay module
N10/1kO Fanfare horn relay
N10/2 Rear SAM control unit with fuse and relay module
N69/1 Left front door control unit
N69/2 Right front door control unit
N69/3 Left rear door control unit (on model 204.0/2/9)
N69/4 Right rear door control unit (on model 204.0/2/9 N73 Electronic ignition switch control unit S15/1 Trunk lid release button (on model 204.0/3)
S15/3 Driver trunk lid/liftgate control button (on model 204.2/9 with code (890) EASY-PACK liftgate)
S85/5 Left front door central locking interior switch
S85/6 Right front door central locking interior switch
S88/6 Trunk lid contact switch (on model 204.0/3 with code (887) Valet Parking)
S88/8 Trunk lid external operation switch (model 204.0/3) liftgate external operation switch (model 204.2/9)
S88/10 Trunk lid emergency opening switch (on model 204.0/3 with code (494) USA version)
CAN B Interior CAN
CAN E Chassis CAN

Central locking (CL [ZV]), general
The CL controls electric locking or unlocking of the vehicle doors, trunk lid (model 204.0/3) or liftgate (model 204.2/9) and fuel filler flap.
The following control elements are available:
- Transmitter key
- Left front door central locking interior switch
- Right front door central locking interior switch
- Trunk lid emergency opening switch (on model 204.0/3 with code (494) USA version)
- Trunk lid release button (on model 204.0/3)
- Driver trunk lid/liftgate control button (on model 204.2/9 with code (890) EASY-PACK liftgate)
The liftgate control is described in the separate document "Liftgate control, function".
The CL function comprises the following partial functions:
^ Function sequence for emergency opening in event of crash
^ Function sequence for mechanically locking trunk lid (on model 204.0/3 with code (887) Valet Parking)
^ Function sequence for subsequently locking trunk lid (model 204.0/3) or liftgate (model 204.2/9)
^ Function sequence for additional door lock (on model 204.0/2/3 with code (885) Increased theft protection)
^ Function sequence for play protection
Further subfunctions will be described in separate documents:
^ Central locking operation with transmitter key, function
^ Locking/unlocking vehicle with inside switch, function
^ Automatic locking, function

Additional function requirements for emergency opening in event of crash
^ Vehicle locked (not locked externally)
Function sequence for emergency opening in event of crash
The emergency opening function unlocks all vehicle doors in the event of a crash.
When the supplemental restraint system control unit defines a crash, it transmits a corresponding signal to the electronic ignition lock control unit and front SAM control unit via the chassis CAN.
Parallel to this, accident recognition is also accomplished by the crash sensor integrated into the front SAM control unit.
When an accident is recognized, the front SAM control unit sends the "Emergency opening" request via the interior CAN to the following control units:
- Left front door control unit
- Right front door control unit
- Left rear door control unit (model 204.0/2/9 as of 1.12.09)
- Right rear door control unit (model 204.0/2/9 as of 1.12.09)
The left rear door control unit locks or unlocks the left front door control via the left front door central locking motor.
The right door control unit locks or unlocks the right front door lock via the right front door central locking motor.
Vehicles up to 30.11.09 (except vehicles with code (885) Increased theft protection):
The front SAM control unit locks or unlocks the left rear door lock via the left rear door central locking motor and the right rear door lock via the right rear door central locking motor.
Model 204.0/2/9 as of 1.12.09:
The left rear door control unit locks or unlocks the left rear door lock over the left rear door central locking motor.
The right rear door control unit locks or unlocks the right rear door lock over the right rear door central locking motor.
After a waiting time of t = 8 to 11 s, all vehicle doors are locked. In the event of rear end collision, the CL is unlocked without waiting time.
The emergency opening function overrides all other central locking functions.
When the vehicle has been locked from the outside, the emergency opening function is not active.

Function sequence for mechanically locking trunk lid (on model 204.0/3 with code (887) Valet Parking)
The mechanical trunk lid locking feature allows valuables to be locked in the trunk intentionally
Mechanical locking of the trunk lid is defined via the status of the trunk lid contact switch. The trunk lid contact switch can be actuated by turning the emergency key of the trunk lid lock cylinder.
The rear SAM control unit directly reads in the status of the trunk lid contact switch and inhibits opening requests from other control points.

Additional function requirements for subsequently locking trunk lid (model 204.0/3) or liftgate (model 204.2/9)
^ Vehicle locked
^ Trunk lid (model 204.0/3) or liftgate (model 204.2/9) open

Function sequence for subsequently locking trunk lid (on model 204.0/3) or liftgate (model 204.2/9)
When the trunk lid of liftgate is closed subsequently, the rear SAM control unit sends the status of the trunk lid rotary tumbler switch (model 204.0/3) or the liftgate rotary tumbler switch (model 204.2/9) to the electronic ignition lock control unit via the interior CAN. The electronic ignition switch control unit then checks, whether all vehicle doors are closed.
If so, the electronic ignition lock control unit sends the request to output a visual feedback.

Additional function requirements for additional door lock (on model 204.0/2/3 with code (885) Increased theft protection)
^ Interior protection activated (with code (882) Interior monitoring (only with ATA [EDW]))
^ Function coded in front SAM control unit
^ All doors closed

Function sequence for additional door lock (on model 204.0/2/3 with code (885) Increased theft protection)
The mechanical inside door handle is decoupled mechanically by the additional door lock when the central locking is locked.
It is no longer possible to open the doors from the inside.
This prevents breaking in into the vehicle by smashing in a window and opening a door from inside.
Upon locking with the central locking, the electronic ignition lock control unit also sends the request "Additional locking" to the following control units, via the interior CAN:
- Left front door control unit
- Right front door control unit
- Left rear door control unit (model 204.0/2/9 as of 1.12.09)
- Right rear door control unit (model 204.0/2/9 as of 1.12.09)
The left rear door control unit actuates the left front door additional door lock actuator motor in the left front door lock.
The right front door control unit actuates the right front door
The left rear door control unit (on model 204.0/2/9) actuates the left rear door additional door lock actuator motor in the left rear door lock.
The right rear door control unit (on model 204.0/2/9) actuates the right rear door additional door lock actuator motor in the right rear door lock.
The rear door control units are supplied with power via the rear SAM control unit and in addition via the left rear door control unit fuse carrier (F64/1) and right rear door control unit fuse carrier (F64/2).

Function sequence for play protection
Each actuation of the CL [ZV] is counted by the electronic ignition switch control unit. Every t = 7 s one actuation is deducted from the current counter status. The maximum number of actuations is 40.
After reaching this value, further action requests for the CL are not performed.
Actuation of the CL [ZV] again is possible only after dropping below this value again.