Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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The respective fuses of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- and Oxygen Sensor (O2S) 2 Behind Three
Way Catalytic Converter (TWC) -G131- must be OK.
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Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) must be OK.
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Battery voltage must be at least 11.5 Volts.
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All electrical consumers such as, for example, lights and rear window defroster must be switched off.
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Parking brake must be engaged or else daylight driving lights will be switched on.
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For vehicles with automatic transmission, selector lever must be in position -P-or -N-.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
Test sequence
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Disconnect 4-pin harness connector to the respective oxygen sensor:
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Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, bank 1 4-pin harness connector (black) -3-,
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Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, bank 2 4-pin harness connector (brown) -4-.
NOTE:
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Bank 1 = Cylinder bank 1, in direction of travel, right
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Bank 2 = Cylinder bank 2, in direction of travel, left
Checking voltage supply and wiring to control module