Locking, function

P80.61-2166-09

Shown on door handle control point

1 Wake-up signal after actuating door handle

2 Wake-up signal for key and checking access authorization code

3 Authorization and access data

4 Open/close selectively/globally

5 Lock vehicle

A72 Rear door locking unit

N10 Front SAM ECU

N10/8 Rear SAM control unit

N69/1 Door control unit front left

N69/2 Door control unit front right

N69/5 Keyless Go control unit

N73 EIS [EZS] control unit

S62/21 Rear-end door Keyless Go button

CAN B Controller area network bus class B (interior compartment) (CAN B)

A2/35 Trunk Keyless Go antenna

A2/39 Left rear door Keyless Go antenna

A2/41 Right rear door Keyless Go antenna

A2/93 Roof antenna module

A8/1 Transmitter key

A17/1 Left front Keyless Go door handle

A17/2 Right front Keyless Go door handle

A17/3 Left rear Keyless Go door handle

A17/4 Right rear Keyless Go door handle

Function requirements

 Circuit 15C OFF

 All doors closed

 Transmitter key outside of vehicle

 The transmitter key is located in the vicinity (radius approx. 1 m) of a door handle.

Possible system activation

 Actuate corresponding button on door handle

 Actuate rear-end door Keyless Go button

Function sequence for door handle control point

The capacitive sensor in the door handle recognizes when the corresponding door handle is pulled slightly and transmits a signal to wake up the Keyless Go control unit and the Keyless Go system (KG)

Then a Keyless Go transmitter key should be recognized in the outer range, otherwise locking is not performed.

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The access authorization from the Keyless Go transmitter key are received by the roof antenna module and are relayed to the Keyless Go control unit The Keyless Go control unit transmits this message to EIS control unit via the CAN-B bus

The EIS control unit checks the access authorization, after positive check it transmits the "Locking" command via the CAN-B bus. The "Locking" command is transmitted to the left and right front door control unit as well as to the rear SAM control unit. They then lock the door locks, the tank flap and the rear-end door electrically.

 Errors occurring when locking are indicated by the instrument cluster (A1).

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Function sequence for rear-end door Keyless Go button control point

When the rear-end door Keyless Go button is pressed the Keyless Go system (KG) is woken up The further function sequence corresponds to the function of the door handle control unit

No transmitter key outside the vehicle

If an attempt is made to lock the vehicle as long as the transmitter key is not located outside the vehicle, this is indicated in the instrument cluster and the vehicle cannot be locked.

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Convenience closing

When the corresponding door handle switch is actuated for longer than t > 1.5 s, the "Convenience closing" command is transmitted to the CAN-B bus.

The windows, the vent windows and the tilting/sliding roof (SR) (with power glass tilting/sliding roof, code 414) are also closed

When locking, the anti-theft alarm system (ATA) code 551, is also activated.

 The convenience closing function is interrupted by pulling the door handle The windows and the tilting/sliding roof are actuated in the opening direction for approx. 2 s.

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Close automatic rear-end door, code 890

On vehicles with automatic rear-end door closing as special equipment, the rear-end door is additionally equipped with a button at the bottom.The left part is the RWTS button (S62/26) and serves for closing the rear-end door.The right section is the rear-end door Keyless Go button for closing the rear-end door and then locking the vehicle in the Keyless Go mode.The rear-end door Keyless Go button is evaluated by the rear-end door closing control unit (N121/1)

If the rear-end door Keyless Go button is actuated with the rear-end door open, when a rear-end door closing operation is not in progress, the rear-end door closing control unit sends a signal to the CAN-B bus.Then the Keyless Go control unit searches for a valid transmitter key in the outer area via the antennas.The EIS control unit checks the authorization of the transmitter key and transmits the command for the rear-end door closing control unit to release the rear-end door.