High Beam Indicator

The high beam indicator gives an indication to the vehicle operator whenever the headlamp high beams are illuminated. The TIPM sends a data Bus message for high beam indicator illumination, in turn the CCN takes this data Bus message directive to turn on the indicator.

The high beam indicator LED is completely controlled by the CCN logic circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, the LED can be illuminated regardless of the ignition switch position. The LED only illuminates when it is provided a path to ground by the CCN transistor. The CCN will turn on the high beam indicator for the following reasons:

• High Beam Headlamps-ON Input  - Each time the CCN detects a high beam headlamps-on input from the headlamp beam select switch circuitry of the multi-function switch on the washer/beam select switch MUX circuit, the headlamp high beams and the high beam indicator will be illuminated. The headlamp high beams and the high beam indicator remain illuminated until the CCN receives a high beam headlamps-off input from the multi-function switch, or until the exterior lamp load shedding (battery saver) timed interval expires, whichever occurs first.

The CCN continually monitors the headlamp switch and the multi-function switch to determine the proper headlamp low beam and high beam control. The CCN then sends the proper low beam and high beam lamp-on and lamp-off messages to the TIPM over the CAN data bus and turns the high beam indicator on or off accordingly.