Door Ajar Warning

The radio activates the door ajar audible warning as requested by the IPC. The IPC sends a class 2 message to the radio indicating the chime frequency (medium rate) and duration (continuous). The door ajar warning sounds and the appropriate door ajar indicator illuminates in the DIC when he following occurs:
^ The Body Control Module (PZM) determines that a door is open (signal is low). The IPC receives a class 2 message from the PZM indicating the door ajar status.
^ The vehicle speed is greater than 4.8 km/h (3 mph). The IPC uses the vehicle speed signal circuit (4000 pulses/mile) from the powertrain control module (PCM) in order to calculate the vehicle speed.