Control Switches

The HUD switch consists of the following controls:
^ the image adjustment switch
^ the display dimming switch

The image adjustment switch controls the electric tilt adjust within the HUD. The image adjustment switch is hard wired to the motor within the HUD in order to move the HUD image vertically on the windshield. When the switch is in the up position, the HUD image up control circuit provides voltage to the motor and the HUD image down control circuit provides the ground. When the switch is in the down position, the HUD image down control circuit provides voltage to the motor and the HUD image up control circuit provides the ground.

The HUD brightness is manually adjusted by turning the display dimming switch. Turn the switch all the way to the left in order to turn off the HUD display. Turn the switch all the way to the right for maximum display brightness. The Instrument Panel Integration Module (IPM) (with CJ2) or the HVAC control module (with C67) monitors the ambient light sensor. The HUD receives a class 2 message from the IPM or the HVAC control module indicating the brightness level. When it is determined that it is daytime, the HUD uses both the integrated HUD photocell and the display dimming switch in order to control the dimming. If it is determined that it is nighttime, the HUD uses the display dimming switch only in order to control the dimming.

"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application ID". RPO Codes