Park Brake Warning

The radio activates the park brake audible warning as requested by the dash integration module (DIM). The DIM sends a class 2 message to the radio indicating the chime frequency of a fast rate and at 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 DIM receives a class 2 message from the engine control module (ECM) indicating the vehicle speed.
• The DIM determines that the park brake is engaged and the signal circuit is low.