5000S Wagon L5-2226cc 2.22L SOHC (KZ) (1985)
Oxygen Sensor: Testing and Inspection
TEST CONDITIONS
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engine oil temperature min. 80°C (176°F)
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radiator fan must have come on at least once
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all electrical consumers switched OFF (radiator fan and A/C must not be running while adjusting)
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pressure gauge not connected
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exhaust system must be free of leaks
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oxygen sensor control function OK
WORK SEQUENCE
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unplug harness connector from differential pressure regulator
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attach hamess adapter VW 1315/A1 between open harness connector and differential pressure regulator
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attach US 1119 to harness adapter VW 1315/A1
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switch US 1119 to DCA 200
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start engine and run at idle for minimum of two minutes
NOTE: After approx. two minutes, exhaust gas warms up oxygen sensor.
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read differential pressure regulator current displayed on US 1119
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current reading must fluctuate
If NO
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check current reading at 3,000 RPM
If still NOT OK
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replace oxygen sensor