OK, so I don't usually need to ask questions here, but we don't have a Navi '09 or '10 TL on the lot and I need to answer a customer. He states that when in Auto Headlight mode, the Navi screen isn't switching to the Night color scheme when the lights come on.

My guess is that the screen brightness is set to 'full bright' and somehow overriding the 'night mode' or that he has the same color for both day and night. Any thoughts?

 

I think you answered your own question. Those are the only two answers I could think of. Thinking out loud always helps

 

I think the Navi screen dims when the GPS determines it's officially sunset. I've had a few Garmin units do the same thing and they act the same. I don't use the Auto-headlight feature, but I think it's based upon actual ambient light conditions.

I have observed the MID go spastic between day and night modes around sunset, and I think it's because it's hooked through the light sensor on the dash.

Hope this helps!

 

I don't know if it stays after re-starting the car but there's a button lower left on the center stack that changes it to day or night or just turns off the screen.

 

Thanks for the reply. Yes, we know about that button. Mostly asking about the automatic function of the display.

 

I haven't figured out what exactly triggers what, but I do know the auto headlight feature and the dimmer for the Nav screen work off separate things. Just this evening I noticed my Nav dimmed, but the headlights didn't come on for sometime later. Noticed the reverse this morning.

 

Ok, this leads me to think that the Navi display is linked to the MID where you have a setting for auto interior light brightness.

 

ok so this is what i found in the pdf manual. its on page 115 in the navigation maual.


System Setup
116 Navigation System
Switching Display Mode Automatically
llumination control Priority Operation But remember
Display Mode button
(see page 10 ) 1 Allows selection of Day, Night or Off display
mode. This button has the highest priority and
overrides all other display control adjustments
listed below.
When the car is restarted, the display mode
previously selected by this button is canceled
and is determined by one of the controls
below.
Sunlight sensor (middle of dash
near the windshield, see the
vehicle Owner’s manual for
location)
2 If the sunlight sensor detects daylight and
the headlights are turned on, the system
automatically overrides (cancels) the Night
display and displays the Day display mode.
If desired, use the Display Mode button
to override this automatic choice.
Dash illumination adjustment
knob (see the vehicle Owner’s
manual for location)
3 When headlights are turned on, and you wish
to have the Day display mode, then adjust the
illumination to the full bright setting (beeps).
With the headlights on, adjust the dash
brightness back to mid-range to allow auto
switching by sensing whether the headlights
are on or off.
Headlights (Auto/On/Off) 4 When turned on, the display changes to Night
display mode. The previous two controls listed
above can cancel this function.
Use the Display Mode button, or, with
the headlights on, adjust the dash illumination
to full bright to set the display to your desired
choice.
Map Day/Night screen color
choice (see page 114 for the
Day and Night color choices)
N/A The user can select the color of the screen
that will be displayed for the Day and Night
display modes.
For best contrast, ensure that the map color is
white for Day and black for Night.
Recommended Display Mode Day/Night settings:
• With the headlights on, select mid-range for the dash illumination (see the vehicle Owner’s manual for location of knob).
• With the headlights off, select mid-range for the dash illumination (see the vehicle Owner’s manual for location of knob).
• On the SET UP “Color” adjustment screen, choose white for the map Day display and black for the map Night display (see
page 114 ). Inappropriate adjustment of these colors can cause the Day/Night modes to appear inoperative.
NOTE:
See the vehicle Owner’s manual for additional information regarding the dash brightness adjustment.
2009 TL

 

^^ thanks for that. I may cut and paste and send to my customer. I think the system is 'out smarting' itself.