Digital Dash light sensor

steinbru at steinbru at
Wed Aug 14 12:48:36 EDT 2002

Ref:  Your note of Tue, 13 Aug 2002 09:34:51 -0400 (attached)

Hi Dave,
Looks like you found the manual ;-)

My "lights needed" started that after I pulled the IC to replace/switch
some bulbs.  I think it's sporadic.  Also the dash dimming still works.
Haven't got back to it, but suspect a bad/loose contact.  It's also
to be switched off by odometer indicating some distance travelled.
I think I have "covered" the eye (or illuminated it with a flashlight)
and seen the illumination vary before, so I think that is how it should
work and how to test maybe.

I have not fiddled with the fuel range adjustments, but I think it is
just that simple.

----------------------------- Note follows ------------------------------
Date: Tue, 13 Aug 2002 09:34:51 -0400
From: <David.Ullrich at>
To: <quattro at>
Subject: Digital Dash light sensor

After reading through the Electronic Instrument Display manual, I have
determined that my dash isn't quite working right.
According to the manual there is an electronic eye that detect light
natural light levels and adjusts the display automatically.
When it detects low light levels it automatically dims the dash and if
you start the car in the dark it will flash a green emblem on the dash
to remind you to turn on your headlights.
But in my case it does this every time, and I've always thought my dash
was too dim in daylight.
It seems to me that the electronic eye must not be functioning properly
and it "thinks" it's dark out and id dimming the dash and tripping the
warning light.
I'd really like to get this feature working right.
Anybody ever had this problem?
Anybody willing to suggest some things to check to help troubleshoot
Also has anybody successfully calibrated their fuel range using the
directions in the manual?
Is it really as easy as it appears?



Too Many Toys:
2002 VW Jetta GLS 1.8T Tiptronic
1993 RX-7 R1
1987.5 Audi Coupe GT "Special Build" 2.3 - Anthracite Black
1985 Chevy Impala Interceptor

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