1. Door switches故障： The door switches are responsible for sending a signal to the body control module (BCM) when the doors are open. If the door switches are faulty, the BCM will not know to turn on the interior lights. Check the door switches for damage or wear and tear.
2. BCM故障： The BCM is responsible for controlling the interior lights. If the BCM is faulty, it may not be able to turn on the lights when the doors are open. Check for any codes stored in the BCM. If there are any codes, diagnose and repair the problem accordingly.
3. Wiring issue: There may be a wiring issue between the door switches and the BCM. Check the wiring for damage or loose connections. Repair or replace the wiring as needed.
If you are unable to diagnose and fix the problem yourself, take your vehicle to a qualified mechanic.
