Turn Signals: Description and Operation

TURN SIGNAL ON
The Radio activates the turn signal on audible warning as requested by the body control module (BCM). The BCM sends a class 2 message to the radio indicating the chime frequency (fast rate) and duration (2 seconds).

TURN SIGNALS
The IPC illuminates the right or left turn signal indicator when the IPC detects a turn signal request or a hazard request. If the IPC determines that the turn signal is active for more than 1.2 km (0.75 mi), the IPC sends a class 2 message to the radio in order to activate an audible warning.