GM Service Manual Online
For 1990-2009 cars only

Door Ajar Indicator System Components

The door ajar indicator system consists of the following components:

    • Driver Door Module (DDM)
    • Passenger Door Module (PDM)
    • Left Rear Door Module (LRDM)
    • Right Rear Door Module (RRDM)
    • Instrument Panel Cluster (IPC)
    • LH Front Door Ajar Switch
    • RH Front Door Ajar Switch
    • LH Rear Door Ajar Switch
    • RH Rear Door Ajar Switch
    • Class 2 serial data circuit
    • Power door serial data circuit

The following are the Driver Information Center (DIC) messages associated with the power door system.

DRIVER DOOR AJAR (140)

The driver door module (DDM) receives a discrete input from the driver door ajar switch.The instrument panel cluster (IPC) receives the status of the driver door from the DDM via class 2 serial data message. When the driver door is open and the vehicle is out of the PARK gear, the IPC displays the message. If the vehicle speed is greater than 4.8 km/h (3 mph) with the driver door open, the IPC displays the message and also sends a class 2 serial data message requesting 5 chimes to sound.

PASSENGER DOOR AJAR (141)

The front passenger door module (PDM) receives a discrete input from the front passenger door ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The instrument panel cluster (IPC) receives the status of the front passenger door from the DDM via class 2 serial data message. When the front passenger door is open and the vehicle is out of the PARK gear, the IPC displays the message. If the vehicle speed is greater than 4.8 km/h (3 mph) with the front passenger door open, the IPC displays the message and also sends a class 2 serial data message requesting 5 chimes to sound.

LEFT REAR DOOR AJAR (142)

The LH rear door module (LRDM) receives a discrete input from the LH rear door ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The instrument panel cluster (IPC) receives the status of the LH rear door from the DDM via class 2 serial data message. When the LH rear door is open and the vehicle is out of the PARK gear, the IPC displays the message. If the vehicle speed is greater than 4.8 km/h (3 mph) with the left rear door open, the IPC displays the message and also sends a class 2 serial data message requesting 5 chimes to sound.

RIGHT REAR DOOR AJAR (143)

The RH rear door module (RRDM) receives a discrete input from the RH rear door ajar switch and sends the status to the driver door module (DDM) via the power door serial data circuit. The instrument panel cluster (IPC) receives the status of the RH rear door from the DDM via class 2 serial data message. When the RH rear door is open and the vehicle is out of the PARK gear, the IPC displays the message. If the vehicle speed is greater than 4.8 km/h (3 mph) with the right rear door open, the IPC displays the message and also sends a class 2 serial data message requesting 5 chimes to sound.