Power Locks: Description and Operation

With the key in the driver's door or front passenger's door, all the car's doors and fuel tank filler cap can be locked and unlocked centrally.

Control module 175 for the central locking system is continuously supplied with current via fuse 16.

The control module is controlled from microswitch 274 in the driver's door, microswitch 435 in the passenger's door or from a switch in switch unit 386 in the centre console.

When the doors are locked, terminal 2 of the control module is grounded and current is supplied for 0.7 seconds to all actuating motors, closing the locks. The motors are grounded via terminal 8.

When switch 514a (LOCK) on the centre console is activated, terminal 5 of the control module is grounded and current is supplied for 0.7 seconds to all actuating motors, closing the locks. The motors are grounded via terminal 8.

When the driver's or passenger's door is unlocked, terminal 1 of the control module is grounded and current is supplied for 0.7 seconds to all actuating motors, opening the locks. The motors are grounded via terminal 7.

When the switch on the centre console is activated (by pressing the part of the switch with no symbol), terminal 6 of the control module is grounded and current is supplied for 0.7 seconds to all actuating motors, opening the locks. The motors are grounded via terminal 7.

If the driver's door is not completely closed and an attempt is made to use the central locking system from this door or from the switch on the centre console, it will not be possible to lock the doors.

If an attempt is made to use the central locking system from the passenger's door when the driver's door is not completely closed, the control module will lock the doors, only to unlock them again shortly afterwards.