How would a driver know they have a door fault?

The door systems indicator light serves as a direct communication tool between the vehicle's door system and the driver. When a fault occurs in the door mechanisms—such as an issue with locking, unlocking, or the sensors that monitor door position—the indicator light is designed to activate, alerting the driver to a problem. This is a crucial safety feature, as it provides immediate, visual feedback on the status of the door systems without requiring the driver to rely on second-hand information or manual checks.

In contrast, relying on passenger complaints or noticing that all doors remain locked is less direct and may not provide timely information about the fault. Additionally, while the door systems report through the MCB (Motor Control Board) could provide diagnostic information, it is not typically something a driver would have immediate access to while driving. Thus, using the door systems indicator light gives the driver a clear and accessible means of detecting door faults promptly.