[b3lha]

Originally Posted by Trevor

(2) The drivers door locking latch is depends entirely on electrical control and the sliding lever comprises only an electrical switch, with any mechanical connection restricted to the key barrel. [See (5) below.]

This is not quite correct as per my understanding. I believe that there is a type of loose-coupling between the motor and the mechanism.

When you slide the lever, the latch moves to the locked position but the motor initally remains in the unlocked position. However, because the latch has now moved, the microswitch has disconnected the ground from the control wire, so the controller drives the motor into the locked position - even though the latch is already in the locked position.

Originally Posted by Trevor

(b) Whether the motor marked “M” has a rotary or linear motion.

The actuator unit operates in a liner fashion, but the motor inside is a rotary type driving plastic gears which move the actuator rod in and out. There are metal contacts inside to define the limits of movement - this internal circuitry is not shown on any diagram. These contacts can wear out or become corroded. If the rubber boot on the actuator rod is split then the actuator can fill up with water which causes no end of problems.

I'm still trying to digest the other information recently presented.