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Key

Key

Transponder



The key with integrated remote control has a built-in transponder with a unique identification code. When the key is inserted into the ignition switch and turned to the ON position, the identification code is sent to the receiver located around the ignition switch. The receiver sends the signal to the TWICE control module, which in turn checks that the code is valid.

The transponder identification code is used for:


The electronic immobilizer

Central locking system

- to unlock the car if it is locked when the key is turned to the ON position

- to inactivate TSL to normal locked mode

Disarming the anti-theft alarm

Theft protection, audio system


Locking all doors



The central locking system can be operated with a key from the driver's door only.

To lock all the doors, the key is turned once clockwise. The luggage compartment cannot now be opened from the inside with the button on the driver's door.

When the key is turned in the lock a microswitch in the lock closes, grounding pin 7 on the lock unit, whereby pin 56 on the TWICE control module is grounded.

A short voltage pulse (0.8 sec.) is output from pin 22 on the TWICE control module to the doors' electric motors, which locks the car.

The lock motors are grounded to the TWICE control module by


pins 26 and 42, driver's door

pins 69 and 66, passenger door

pins 49 and 20, rear doors




Unlocking all doors


To unlock all the doors, the key is turned once anticlockwise. The luggage compartment can now be opened with the button on the driver's door.

When the key is turned in the lock a microswitch in the lock closes, grounding pin 3 on the lock unit, whereby pin 33 on the TWICE control module is grounded.

A short voltage pulse (0.8 sec.) is emitted from the TWICE control module


pin 26 to the driver's door

pin 69 to the passenger door

pin 49 to the rear doors


The lock motors are grounded to the TWICE control module by


pins 42 and 22, driver's door

pins 66 and 22, passenger door

pins 20 and 22, rear doors





Activating TSL with the key (Not US/CA)



To activate the TSL, the key is turned twice clockwise (LHD) - or anti-clockwise (RHD) within five seconds. The car horn sounds once to confirm TSL activation.

When the key is turned the first time, a microswitch in the lock closes, grounding pin 7 (LHD) or pin 2 (RHD) on the lock unit, whereby pin 56 on the TWICE control module is grounded.

A short voltage pulse (0.8 sec.) is output from pin 22 on the TWICE control module to the doors' electric motors, which locks the car.

The lock motors are grounded to the TWICE control module by


pins 26 and 42, driver's door

pins 69 and 66, passenger door

pins 49 and 20, rear doors




When the key is turned the second time within five seconds, the microswitch in the lock closes once more, grounding pin 7 (LHD) or pin 2 (RHD) on the lock unit, whereby pin 56 on the TWICE control module is grounded.



A short voltage pulse (0.8 sec.) is emitted from the TWICE control module


pin 42 to the driver's door

pin 66 to the passenger door

pin 20 to the rear doors

pin 22 to all doors to ensure the lock motors reach their end positions.


The lock motors are grounded to the TWICE control module by


pin 26, driver's door

pin 69, passenger door

pin 49, driver's door




Inactivating TSL with the key (Not US/CA)


TSL unlocking is not possible with the key and must be done with the remote control by pressing the unlock button, see . However, it is possible to open the door in emergencies, see “Emergency opening” below.

Emergency opening


In the event of a defective remote control or discharged battery, the driver's door can be opened mechanically using the key. If they car was opened with the key due to a defective remote control, all doors will unlock when the ignition key is turned to the ON position in the ignition switch and the correct immobilization code has been identified. See group 3 Electrical system, Anti-theft protection.

If an anti-theft alarm is fitted, it will be activated by emergency opening but is disarmed when the ignition is turned to ON and the correct immobilizer code has been identified.

On the US/CA markets, the alarm is disarmed when the door is unlocked (emergency opening) with the key.

Separate unlocking of driver's door with key (US/CA)



The function can also be programmed for other markets.

To unlock the driver's door separately, the key is first turned once anti-clockwise (LHD) - or clockwise (RHD). The boot lid can now be opened via the button on the driver's door.

When the key is turned in the lock a microswitch in the lock closes, grounding pin 3 (LHD), pin 8 (RHD), on the lock unit, whereby pin 33 on the TWICE control module is grounded.

A short voltage pulse (0.8 sec.) is output from pin 26 on the TWICE control module to the driver's door which is then unlocked.

The lock motor is grounded to pins 42 and 22 on the TWICE control module.



When the key is turned a second time, the microswitch will again close, grounding pin 3 (LHD), pin 8 (RHD), on the lock unit, whereby pin 33 on the TWICE control module is grounded.



A short voltage pulse (0.8 sec.) is emitted from the TWICE control module


pin 69 to the passenger door

pin 49 to the rear doors


The lock motors are grounded to the TWICE control module by


pins 66 and 22, passenger door

pins 20 and 22, rear doors




Diagnostics

A fault in the transponder will generate DTC B2385 in TWICE and P1460 in Trionic T7. No DTCs are generated in the event of a fault in the remote control.

P1460 is generated because the immobilizer function does not allow Trionic to turn off the fuel shut-off.

If the battery terminal voltage is below 2.3 V when pressing the button 10 times in succession, the message "REPLACE REMOTE CONTROL BATTERY" will be displayed on THE SID. If "REPLACE REMOTE CONTROL BATTERY" is displayed, the battery must be changed immediately to avoid functional disorders, see Changing the key battery .

Note

B2385 and P1460 can be generated for reasons other than a defective transponder.