To check this you will need to pull the door panels off measure the actual voltage at the solenoids whilst manipulating the lock switch.
Toyota echo door lock problem.
You either have a bad door lock switch or the power lock solenoids are beginning to fail.
How to repair door lock toyota cars.
Years 1999 to 2007.
Front passenger door lock won t lock unlock.
Echo s don t normally come standard with central locking unless it s a sportivo which by memory was the only one that came with it so more than likely it s an aftermarket kit.
Years 1990 to 2010.
How to fix error in power door locks or central lock system toyota corolla.
This adjustment is not really a repair but will help you to fix the issue if the car is set in a mode that you do not like.
Depending on the manufacturer there s probably a procedure to get it to revert to 1 stage unlock.
If all four doors fail to lock unlock or if multiple doors fail to lock unlock the odds are that you have either a blown fuse or an electrical issue like a bad relay.
If you own any recent toyota model that has power locks and an automatic transmission you have the ability to change the sequence for the locking and unlocking of the doors as determined by the current mode.
Regarding the front door locks.
Your first step should be to check your fuse box and owner s manual to find the fuse related to the door locks.
You need to replace the electric door lock solenoid the electrical part of the solenoid may be compromised and is not letting the solenoid arm retract or extend to lock unlock your door.
The toyota dealer has already looked at the car and advised that the locking mechanism was faulty and would need to be replaced.
How to repair door lock toyota cars.
Years 1990 to 2010.
Probably set for 2 stage unlocking by the sounds of things.