Scheme of the door lock system: 1 - control unit; 2 - motor reducer for blocking the passenger door lock; 3 – gearmotor for locking the driver's door lock; A - to power supplies; B - scheme of conditional numbering of plugs in the block of the control unit; C - a scheme of conditional numbering of plugs in the blocks of gear motors for blocking locks.
Locking rods are driven by gearmotors installed in each door. The motor-reducer of the left front door is equipped with a built-in switch, the contacts of which are switched when the lock lock button is moved or when the door lock cylinder is turned with a key. Through the closed contacts of the switch, a signal is sent to block 1 (see fig.), and it includes all gearmotors. The control unit is provided with an inertial switch, thanks to which the locks are unlocked when a moving vehicle hits an obstacle, i.e. in case of an accident.
In the event of a malfunction, it is necessary to check the wires and their connections, the control unit, the gearmotors. Replace defective control unit and gearmotors with new ones. The replacement of gearmotors is described in detail in the section «Body» («Replacing the power window rear door», «Replacing the power window of the front door»).