Turn Signal On Warning

The radio activates the turn signal on audible warning as requested by the body control module (BCM). The BCM sends a serial data message to the radio indicating the chime frequency (single chime in phase with turn signal indicator) and duration (continuous). The turn signal on warning sounds when the following occurs:

• The ignition is ON.
• The BCM detects that the turn signal is active for greater than 1.2 km (0.75 mi). The BCM calculates the distance based on a serial data message from the engine control module (ECM) indicating the vehicle speed.