Passat GLX V6 V6-2.8L (ATQ) (2001)
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connected.
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Use auxiliary wires from VAG 1594 to connect multimeter with terminals 3 + 4 of appropriate 4-way connector (going to control module) to make
voltage measurement.
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Switch ignition on and measure primary voltage.
Specification: 0.40-0.50 V
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Switch ignition off.
If expected value is not obtained on one or both Heated Oxygen Sensors (HO2S):
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Test oxygen sensor wires.
If specified values are obtained:
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Replace appropriate Heated Oxygen Sensor (HO2S) before catalytic converter.
Checking Oxygen Sensor Wires
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Connect VAG 1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
