Circuit/System Description

The keyless entry control module provides a 12 V signal to the driver door open switch signal circuit. The driver window motor or the driver window switch provides a 12 V signal to the driver door ajar switch signal circuit. The door open switch and the door ajar switch are integral to the driver door latch assembly.

The door open switch and the door ajar switch contacts will be open with the door is fully closed, the door switches within the door latch are designed so that the when the door is ajar, the contact in the door ajar switch closes, the voltage is pulled low and the driver window motor or the driver window switch will then send a serial data message to the body control module indicating that the door is ajar. When the driver door is opened further, the contact in the door open switch will then close providing a ground for the door open signal circuit, the keyless entry control module will then detect that the door is open.