Locking all doors

Fig 1: Identifying Communication Diagram - Locking All Doors

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Circuit Diagram - Locking All Doors

Courtesy of SAAB-SCANIA OF AMERICA, INC.

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