sensor VOLVO 850 1996 User Guide

1996 Volvo 850

Deposit control gasoline

Volvo recommends the use of gasoline containing deposit control additive\
s. These additives have shown
to be efficient in keeping injectors and intake valves clean. Consistent\
use of deposit control gasolines
will help ensure good driveability and fuel economy. If you are not sure\
whether the gasoline contains
deposit control additives, check with the service station operator.

Unleaded Fuel

Each Volvo has a three-way catalytic converter and must use only unleade\
d gasoline (as specified on the
instrument panel and by a label near the filler inlet). U.S. and Canadi\
an regulations require that pumps
delivering unleaded gasoline be labelled "UNLEADED". Only these pumps ha\
ve nozzles which fit your
car's filler inlet. It is unlawful to dispense leaded fuel into a vehicl\
e labelled "unleaded gasoline only".
Leaded gasoline damages the three-way catalytic converter and the heated\
oxygen sensor system.
Repeated use of leaded gasoline will lessen the effectiveness of the emi\
ssion control system and could
result in loss of emission warranty coverage. State and local vehicle in\
spection programs will make
detection of misfueling easier, possibly resulting in emission test fail\
ure for misfueled vehicles. pg. 4:3 Fuel requirements, Refueling
Octane Rating

Volvo engines are designed for optimum performance on unleaded premium g\
asoline with an octane
rating, AKI of 91, or above. AKI (ANTI KNOCK INDEX) is an average of t\
he Research Octane
Number, RON, and the Motor Octane Number, MON, (RON + MON/ 2).
The minimum octane requirement is AKI 87 (RON 91).

Gasoline Containing Alcohol and Ethers

"Oxygenated fuels"
Some fuel suppliers sell gasoline containing "oxygenates" which are usua\
lly alcohols or ethers. In some
areas, state or local laws require that the service pump be marked indic\
ating use of alcohol or ethers.
However, there are areas in which the pumps are unmarked. If you are not\
sure whether there is alcohol
or ethers in the gasoline you buy, check with the service station operat\
or. To meet seasonal air quality
restrictions, some states require the use of "oxygenated" fuel in certai\
n areas.
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1996 Volvo 850
28 Cruise control, heated rear windows, seat belt reminder light,
bulb failure warning sensor, shiftlock 10A
29 ABS 15A
30 Cigarette lighter 10A
31 ECC blower (speeds 1-3), ECC, AC-compressor 25A
32 Audio system, remote controlled central locking 10A

Location * Amperage
33 Rear window wiper/washer (wagons) 15A
34 Windshield/headlight wipers/washers, horn 25A
35 Instrument panel lights, power sun roof 10A
36 –
37 Power windows, power sun roof AUT/CB **
38 –
39 Power seat (driver's side) AUT/CB **
40 Power seat (passenger's side) AUT/CB **
* Some of the equipment/systems listed may be available on certain model\
s only.
** This is an automatic circuit breaker located in the fuse box and does\
not normally need to be
replaced.

For more detailed information concerning function and location of relays\
, fuses, etc., refer to the Volvo
Service Manuals. These can be purchased directly using the Service Liter\
ature Brochure/Order Form or
through your Volvo retailer. pg. 6:15 Installation of accessories
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1996 Volvo 850
pg. 8:8 Servicing (cont.)
Fuel System

The fuel system is all-electronic and is microprocessor-controlled. It c\
an continually compensate for
variation in engine load, speed and temperature to give the best economy\
and power. A mass air flow
sensor measures the inducted air. In this way the system can make instan\
taneous adjustments for
changes in air temperature or density, thus always assuring the best eco\
nomy with the lowest possible
exhaust emissions.

Heated oxygen sensor

This is an emission control system designed to reduce emissions and impr\
ove fuel economy. The heated
oxygen sensor monitors the composition of the exhaust gases leaving the \
engine. The exhaust gas
analysis is fed into an electronic module. This adjusts the air-fuel rat\
io to provide optimum conditions
for combustion and efficient reduction of the three major pollutants (h\
ydrocarbons, carbon monoxide
and oxides of nitrogen (NOx) by a three-way catalytic converter.

Secondary Air Injection (certain models)

This system adds air to the hot exhaust gases as they are expelled from \
the engine. This causes a
secondary combustion of residual hydrocarbons and carbon monoxide, resul\
ting in lower emissions
levels in the exhaust gases.


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