GF80.20-P-2002CA Operating Central Locking With Transmitter Key, Function

GF80.20-P-2002CA Operating Central Locking With Transmitter Key, Function

Function requirements, general
^ Terminal 15C OFF

Central locking (CL [ZV]), operation with transmitter key function, general
The CL [ZV] can be operated with the transmitter key (A8/1). The operation of the transmitter key comprises the following partial functions:
^ Function sequence for presetting global and selective unlocking
^ Function sequence for locking or unlocking
^ Function sequence for acoustic locking feedback (model 207.3 as of 1.6.10 and model 207.4)
^ Function sequence for visual locking feedback
^ Function sequence for remote trunk opening

Function sequence for presetting global and selective unlocking
If the unlock and lock buttons on the transmitter key are pressed simultaneously for 5 seconds, a change between the "global" and "selective" settings takes place. The indicator lamp on the transmitter key comes on for confirmation.

- Global unlocking:
The entire vehicle is unlocked by first pressing the "Unlock" button on the transmitter key.

- Selective unlocking:
Only the driver door and the fuel filler flap are unlocked when the "Unlock" button on the transmitter key is pressed the first time. The next actuation unlocks the entire vehicle.

Function sequence for locking or unlocking
When the "Lock or unlock" button the transmitter key is actuated, it transmits a radio signal on model 207.3 via the FM, AM and CL antenna amplifier (A2/18) or on model 207.4 to the FM, AM and CL antenna amplifier (A2/55). The antenna amplifier relays this signal directly to the rear SAM control unit with fuse and relay module (N10/2). This relays the signal to the electronic ignition lock control unit (N73) via the interior CAN (CAN-B).
Parallel to the radio signal, an infrared signal is transmitted to the driver front door infrared remote control receiver (A26/1) (precise aiming required).
This signal is read in by the left front door control unit (N69/1) and transmitted to the electronic ignition switch control unit with interior CAN.

The infrared and radio signals include the same information (redundant); the first signal received is accepted.

The access authorization for the transmitter key is checked in both cases by the electronic ignition switch control unit. If the access authorization is valid, the electronic ignition switch control unit transmits the command "Lock or unlock" with the interior CAN to the:
- Left front door control unit
- Right front door control unit (N69/2)
- Rear SAM control unit

The front door control units actuate the following motors:
- Left front door central locking motor (A85m1)
- Right front door central locking motor (A85/1m1)

On vehicles with additional door lock (with code (885) Increased theft protection) the following actuator motors are actuated:
- Left front door additional door lock actuator motor (A85m4)
- Right front door additional door lock actuator motor (A85/1m4)

The status of the vehicle doors as well as the trunk lid is read in over the following switches:
- Left front door rotary tumbler switch (A85s1)
- Right front door rotary tumbler switch (A85/1s1)
- Trunk lid rotary tumbler switch (M14/7s1)

The rear SAM control unit actuates the tank cap central locking motor (M14/10).
Moreover, it inhibits the opening request from the trunk lid external operation switch (S88/8) or enables it.

Mechanically locking trunk lid (with code (887) Valet Parking):
By turning the lock cylinder on the trunk lid with the emergency key, the trunk lid contact switch (S88/6) is actuated. This signal reads in the rear SAM control unit and inhibits the opening request for the trunk lid.

Function sequence for acoustic locking feedback Model 207.3 as of 1.6.10 and model 207.4)
The acoustic locking feedback can be selected and activated in the instrument cluster (A1) over the left multifunction steering wheel button group (S110). The control signals from the left multifunction steering wheel button group are read in by the steering wheel electronics (N135) via the steering LIN (LIN E1) by the steering column tube module control unit (N80), which relays the control signals to the instrument cluster via the chassis CAN (CAN E). The status of the acoustic locking feedback is transmitted by the instrument cluster to the front SAM control unit with fuse and relay module (N10/1) via the interior CAN.
If the acoustic locking feedback function is activated and the successful locking and unlocking, an acoustic feedback is output by momentarily actuating the left horn (H2) and right horn (H2/1).

When the transmitter key is valid and the acoustic locking feedback is activated, the electronic ignition lock control unit transmits the command "Lock or unlock" to the front SAM control unit via the interior CAN. Then the front SAM control unit momentarily actuates the horns via the horn relays (N10/1kO).

Number of acoustic signals:
- Locking: three signals
- Unlocking: one signal

If a door is still open when locking, there is no acoustic feedback.

On model 207.3 up to 31.5.10 with code (494) USA version, the locking feedback is realized via the alarm siren (H3/1).

Function sequence for visual locking feedback
After successfully locking or unlocking, the following components provide visual feedback:
- Left turn signal indicator lamp (A1e1)
- Right turn signal indicator lamp (A1e2)
- Left front turn signal lamp (E1e5)
- Right front turn signal lights (E2e5)
- Left rear turn signal lights (E3e1)
- Right rear turn signal lights (E4e1)
- Left outside mirror turn signal lamp (E6/5)
- Right outside mirror turn signal lamp (E6/6)

The function is controlled by the front SAM control unit, transmitting the turn signal as blink master with the interior CAN:
- Locking: flashing 3 times
- Unlocking: flashing once

Number of visual signals
- Locking: three signals
- Unlocking: one signal

If a door is still open when locking, there is no visual feedback.

Detailed information for exterior lights is given in the separate description.

Function sequence for remote trunk opening
When the button "Trunk lid remote opening" on the transmitter key is actuated, it transmits a radio signal to the rear SAM control unit with the FM, AM and CL antenna amplifier. This relays the signa to the electronic ignition switch control unit with interior CAN.

The electronic ignition lock control unit checks the access authorization for the transmitter key. If the access authorization is valid, the electronic ignition switch control unit transmits the command "Unlock trunk" to the rear SAM control unit with interior CAN.

The rear SAM control unit unlocks the rotary tumbler of the trunk lid via the trunk lid central locking motor (M14/7). The trunk lid is opened to the upper stop by spring force.

It is also possible to transmit infrared signals as described under "Lock or unlock", however, in practical application, the remote trunk lid opening function is required only, when interference such as electromagnetic fields block the radio signal.