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1997 Volvo 850
Air pump system (certain models)
When the engine is being started from cold, an electrical air pump which draws air to the exhaust system
is activated. This starts an afterburning process which leads to reduced hydrocarbon and carbon
monoxide (HC and CO) emissions and reduces the warm-up period for the catalytic converter.
The pump starts when the car has been started and is moving. It continues to work until the catalytic
converter has reached normal working temperature, although it can also start when the engine is idling.
If the air pump is running and the engine is switched off, the pump continues working in order to protect
the pump motor.
NOTE: A soft whining noise can be heard from the pump, and when it performs a self-diagnosis, the
high/low beam and the instrument lighting will flash briefly. This is completely normal.
pg. 8:15 Windshield washer nozzles, Washer fluid reservoir
Adjusting washer nozzles
The washer jets should spray the windshield as shown above. Use the edge of a small screwdriver to
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