Park Brake Warning

The radio activates the park brake audible warning as requested by the body control module (BCM). The BCM sends a class 2 message to the radio indicating the chime of a fast rate frequency and a continuous duration. The park brake warning sounds and the brake indicator illuminates when the following occurs:

• The ignition is ON.
• The vehicle speed is greater than 5 km/h (3.1 mph). The BCM receives a class 2 message from the PCM indicating the vehicle speed.
• The BCM determines that the park brake is engaged and the signal circuit is low.
• The vehicle is not in park. The BCM receives a class 2 message from the PCM indicating the gear position.