Chevrolet Trax: Door ajar indicator description and operation

Door Ajar Indicator System Components

The door ajar indicator system consists of the following components:

• Body control module
• Instrument cluster
• Driver door latch
• Passenger door latch
• Left rear door latch
• Right rear door latch
• Liftgate door latch
• Driver window motor (AXG)
• Passenger window motor (AEF)
• Left rear window motor (AER)
• Right rear window motor (AER)
• Passenger window switch (AED)
• Left rear window switch ( AEQ)
• Right rear window switch (AEQ)

Door Ajar Indicator GG SUV Block Diagram

Fig. 41: Door Ajar Indicator GG SUV Block Diagram

Driver, Passenger and Rear Door Ajar (AXG, AEF, AER)

The window motors provide a 12V signal to the respective door ajar switch within the door latch to indicate the status of the door. When the door is open, the contract within the ajar switch closes providing a ground part for the signal circuit. The window motor will detect the voltage drop in the ajar signal circuit and will send a serial data message to the body control module. The body control module will then send a message to the instrument cluster which will illuminate the door ajar icon.

Passenger and Rear Doors Ajar (AER, AEQ)

The passenger and rear window switches provide a 12V signal to the respective door ajar switch within the door latch to indicate the status of the door. When the door is open, the contract within the ajar switch closes providing a ground part for the signal circuit. The window switch will detect the voltage drop in the ajar signal circuit and will send a serial data message to the body control module. The body control module will then send a message to the instrument cluster which will illuminate the door ajar icon.

Driver, Passenger and Rear Doors Ajar (With A55, A66, A33 or APW)

The body control module provides a 12V signal to each door ajar switch within the door latch to indicate the status of the door. When the door is open, the contract within the ajar switch closes providing a ground part for the signal circuit. The body control module will detect the voltage drop in the ajar signal circuit and will send a message to the instrument cluster which will illuminate the door ajar icon

Liftgate Ajar

The body control module provides a 12 V signal to the liftgate ajar signal circuit. The liftgate latch contains an ajar switch which is normally open when the liftgate is closed. When the liftgate is opened, the normally open ajar switch closes. With the ajar switch closed, ground is provided to the ajar switch signal circuit. The body control module detects the voltage drop and sends a serial data message to the instrument panel to display the door ajar indicator

FUEL FILL DOOR DESCRIPTION AND OPERATION (NO8 ONLY)

Fuel Door Unlatch System Components

• Body control module (BCM)
• Fuel door unlatch actuator

The locking and unlocking of the fuel door is a function of the power door lock system. The fuel door unlatch actuator shares the circuit with the driver door latch. The body control module (BCM), upon receipt of a lock switch lock or unlock signal, will switch the appropriate door latch, as well as a fuel filler door unlatch actuator control circuits to B+ voltage. The opposing side of the door latch and fuel filler door unlatch actuator is connected to ground provided by the BCM through the other the door latch control circuits, along with the fuel filler door unlatch actuator, will lock or unlock as commanded.

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