Lock Units Side Doors

The lock units (3/74-77) are in the doors and are directly connected to the door control module in the relevant door.

There are different versions of the lock units, depending on the configuration of the lock motors.

There are two versions of the lock units in the front doors with lock motors for:

• central locking
• central locking and deadlocking.

The locking units in the rear doors (only applies to the S40/V50) are available in four versions with locking motors for:

• central locking
• central locking and deadlocking
• central locking, deadlocking and child-proof locking
• central locking and child-proof locking.

The central locking lock motor locks the door.

The deadlock lock (BLL) motor disengages the inner lock button (only C30/S40/V50) and the inner door handle.

The child-proof lock motor is only for the rear doors (only S40/V50) and disengages the inner door handle.

The door control modules can only unlock the doors on receipt of a command from the central electronic module (CEM). In addition to the lock motors, the lock units contain up to three contract breakers depending on the configuration:

• contact breaker to indicate that the central locking motor is in the locked position
• contact breaker to indicate that the door is in the latch position (not fully closed)
• contact breaker to indicate the child-proof lock motor is locked (only S40/V50).

The lock motors have built in overheating protection which prevents the motor from activating if there is a risk of the motor getting too hot.