Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
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Switch multimeter to Voltage measurement range
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Connect Multimeter between terminals 3 + 4 of ECM connector using jumper wires from VW 1594 adaptor kit
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Start engine and measure basic Voltage.
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Specification: 0.40 to 0.50 Volts
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Switch OFF ignition.
If specification not obtained
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Check Oxygen sensor wiring.
If specification obtained
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Replace Oxygen sensor G39 (before Three Way Catalyst).
Oxygen sensor wiring, checking
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Connect VAG 1598/22 Test Box to Engine Control Module harness connector.
