Front passenger CL doesn't work

[lenientism]

Before taking it into examination this weekend, what is likely the problem with front passenger central lock which doesn't work. The rest three doors can lock and unlock automatically according to order from remote control, or once the brake pedal is kicked down. It even can't be operated manually, it doesn't want to move from unlock position.

This might not be a big problem, but sometimes lazy if I have to screw and unscrew the door to observe the problem.

[bertelli_1]

A bit more info would be good. What car is it? Vacuum or electric? My first guess would be a fault with the CL actuator or its wiring somewhere in the offending door. Does it still make a noise even though it doesn't lock?

[lenientism]

It's a Toyota Avanza.., I don't know this is a vacuum or electric type. Even though the lock is switched on it stays unlock, the alarm comes on when opening the door.

All doors but this one have some noise if I lock or unlock the door from driver's door. This one just doesn't respond at all. It looks like mechanical system problem, some connector parts or something broken off.

[autopian]

lenientism said:

It's a Toyota Avanza.., I don't know this is a vacuum or electric type. Even though the lock is switched on it stays unlock, the alarm comes on when opening the door.

All doors but this one have some noise if I lock or unlock the door from driver's door. This one just doesn't respond at all. It looks like mechanical system problem, some connector parts or something broken off.

it will be electric and more than likely the actuator will for part of the latch, look to see if the door wiring loom is intact as they will often break between the door and wing, if not you will probably looking at a new unit if the wiring is good.

[S7Paul]

I had the same problem on the front passenger door of a Toyota Picnic very recently. On the Picnic the mechanism is driven by an electric motor. Water had got into the plastic housing in which the motor is mounted, and the motor had gone rusty.

The housing isn't supposed to come apart, but I managed to prise the two halves apart without breaking anything. I then removed the motor, unbent the two tabs that hold it together, stripped it down and cleaned it as best I could. I then put the motor back together with plenty of WD-40.

Having done all that, it was still a bit stiff to turn, so I put the end of the output shaft in the chuck on my Dremel and ran it on low speed for a while, keeping it sprayed with WD-40. After a short time the motor started turning more freely. I then put it all back together temporarily and connected the motor terminals to a 12V battery. It worked.

The only problem I then had was to get the plastic gears in the mechanism aligned properly so that it was at the correct point in it's movement. This took a couple of attempts.

The end result is that it now works as it should. I don't know how long it will last, but so far it's saved the cost of a new motor assembly (at Toyota prices!).

[Mr2Mike]

S7Paul said:

I don't know how long it will last

As long as you applied some proper lubrication to the motor bearings after you freed it off (i.e. not WD40) then it stands a good chance of lasting as long as it doesn't get wet again.