sensor BUICK RIVIERA 1993 Owners Manual

Twilight Sentinel
Twilight Sentinel turns your headlights
on and off by
sensing how dark it
is
outside.
To operate
it, leave the light switch off and move the
Twilight Sentinel control to any position but
OFF.
If you move the control. all the way to MAX, your lights
will remain on for three minutes after you turn
off your
engine.
If you move the control almost all the way in the
other direction, the lights will
go off quickly when you
turn off your engine. You can change this delay time
from only a few seconds to three minutes. Your
Twilight Sentinel and Daytime Running Lights
(Canada Only) work with the light sensor
on top of your
instrument panel. Don’t cover it up, if you
do it will read
“dark” and your lights will come on.
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-Headlights Reminder Light (Canada Only)
If your vehicle was first sold, when new, in Canada, this
light will go on at night to remind you to turn on the
headlights.
Daytime Running Lights (Canada Only)
The Canadian Federal Government has decided that
“Daytime Running Lights” (DRL) are a useful feature,
in that DRL can make your vehicle more visible to
pedestrians and other drivers during daylight hours.
DRL are required on new vehicles sold in Canada. Your
DRL work with a light sensor on
top of the
instrument panel. Don’t cover it up.
The low beam headlights will come
on at reduced
brightness in daylight when:
The ignition is on.
The headlight switch is off, and
The transaxle is not in “P” (Park).
At dusk, if the Twilight Sentinel feature is turned
on, the
exterior lights will come on automatically and the low
beams will change to
full brightness. At dawn, the
exterior lights will
go out and the low beams will
change to the reduced brightness of DRL (if the
headlight switch is
off). If the Twilight Sentinel is off, at
dusk a “HEADLIGHTS SUGGESTED” message will
appear on the instrument panel to remind you to turn. on
the headlights.
Of course, you may still turn on the headlights any time
you need to.
.
To idle your vehicle with the DRL off, shift the
transaxle into
T“ (Park). The DRL will stay off until
you shift out of “P”.(Park).
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I
Gasolines for Cleaner Air
Your use of gasoline with detergent additives will help
prevent deposits from forming in your engine and fuel
system. That helps keep your engine in tune and your
emission control system working properly. It’s good €or
your vehicle, and you’ll be doing your part for cleaner
air.
Many gasolines are now blended with materials called oxygenates. General Motors recommends that you use
gasolines with these blending materials, such as MTBE
and ethanol. By doing
so, you can help clean the air,
especially in those parts
of the country that have high
carbon monoxide levels.
In addition, some gasoline suppliers are now producing
reformulated gasolines. These gasolines are specially
designed to reduce vehicle emissions. General Motors
recommends that you use reformulated gasoline. By
doing
so, you can help clean the air, especially in those
parts of the country that have high Ozone levels.
You should ask your service station operators if their
gasolines contain detergents and oxygenates, and if they
have been reformulated
to reduce vehicle emissions.
Fuels in Foreign Countries
If you plan on driving in another country outside the
U.S. or Canada, unleaded fuel may be hard to find. Do
not use leaded gasoline. If you use even one tankful,
your emission controls won’t work well or at all. With
continuous use, spark plugs can get fouled, the exhaust system can corrode, and your engine oil can deteriorate
quickly. Your vehicle’s oxygen sensor will be damaged.
All of that means costly repairs that wouldn’t be covered
by your warranty.
To check on fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you’ll be driving.
You can also write us at the following address for
advice. Just tell us where you’re going and give your
Vehicle Identification Number
(VIN).
General Motors of Canada Ltd.
International Export Sales
P.O. Box 828
Oshawa, Ontario L1H 7N1, Canada
218