Head Up Display (HUD) Description and Operation

Head Up Display (HUD) Description and Operation

General Description

The head up display is a secondary display system that reflects vehicle information onto the windshield. The head up display system consists of the following:

* The vehicle speed display
* The engine speed display
* The outside air temperature display
* The audio information display
* The transmission gear display
* The compass heading display
* The turn-by-turn display if the vehicle is equipped with a navigation radio
* The indicator displays
* The control switches
* Arbitrary messages

Indicator Displays

The head up display displays the following:

* Turn signal indicators
* High beam indicator
* Km/h (MPH) indicator
* Fuel level low message
* Traction control active message
* StabiliTrak active message
* Check tire pressure message
* Cruise set to message
* Speed limited to message

For further information, refer to Indicator/Warning Message Description and Operation (Indicator/Warning Message).

Vehicle Speed Display

The head up display displays the vehicle speed based on the information from the ECM. The ECM sends the vehicle speed information via a High Speed CAN-Bus signal to the instrument cluster. The instrument cluster then sends the vehicle speed information via a Low Speed CAN-Bus signal to the head up display in order to display the vehicle speed, either in kilometers or miles, based on the vehicle requirements

Engine Speed Display

The head up display displays the engine speed based on the information from the ECM. The ECM converts the data from the engine speed sensor to an engine revolution signal. The ECM sends the engine speed information via a High Speed CAN-Bus signal to the instrument cluster. The instrument cluster then sends the information via a Low Speed CAN-Bus signal to the head up display to display the engine speed.

Audio Information Display

The head up display displays the following audio information:

* The audio source or band and station or track information
* The CD disc (for multiple changer) and the CD track
* The turn-by-turn messages if the vehicle is equipped with a navigation radio

The head up display receives serial data messages from the radio indicating the display mode, the frequency, the band, and the CD track.

Control Switches

The head up display switch is located to the left (part of near headlamp switch) of the steering wheel. The head up display switch consists of the following controls:

* Off
* Dimming
* Up/Down
* Page

Off

To turn off the head up display, rotate the dimming knob fully counterclockwise until the head up display turns off.

Dimming

Turn the dimming knob clockwise or counterclockwise to brighten or dim the head up display.

Up/Down

Press the Up or Down switch to center the head up display image in your view. The head up display image can only be adjusted up and down, not side to side.

Page

There are three different formats which can be selected. Each press of the page switch will cycle to the next page. Holding down the button does not cycle through pages.

Display formats

There are three different formats with different displays.

Format 1 shows:

* Vehicle speed display
* Turn signal indicators
* High beam indicator
* Transmission gear display
* Outside air temperature display
* Compass heading display

Format 2 shows:

* Vehicle speed display
* Turn signal indicators
* High beam indicator
* Transmission gear display (only for Tap up/down mode)

Format 3 shows:

* Vehicle speed display
* Engine speed display
* Turn signal indicators
* High beam indicator
* Transmission gear display