Toyota Matrix back door light sensor failure, location assistance needed for replacement on Toyota Matrix

Some Toyota Matrix owners report experiencing issues with the back door light sensor, particularly related to the Power Back Door Sensor Assembly. These problems may require the removal of the door trim and pillar to access the sensor, which is connected to a white panel. Additionally, owners can test the door courtesy switch, located where the door meets the vehicle body, to determine if it is functioning properly. The door sensor and lock are connected to the latch via a 4-pin electrical connector, and the switch in the latch is responsible for grounding the rear dome light circuit. Some owners have noted a black oval switch under the U-shaped locking mechanism that should deactivate the dome light when the door closes. Furthermore, a rubber switch on the B post may become stuck, necessitating replacement to resolve the issue. Prompt attention to these components can help ensure proper functionality of the back door light sensor.