The door cannot be opened from inside the vehicle when the lock is set.
These locks can be set to prevent children from opening the rear doors. Push down on each rear door switch to lock both rear doors.

Locking the front doors from the outside without a key
Automatic door locking and unlocking systemsOn-vehicle inspection
1. INSPECT AIR-FUEL RATIO COMPENSATION SYSTEM
(a) Measure the voltage between the terminals of the ECM
connectors.
Standard:
NOTICE:
Connect test leads to the connector's backside. The connectors
should not be disconnected from the ECM.
HINT:
Voltage between the terminals of the EC ...