volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor and Oxygen Sensor Control, Checking|Page 2489 > < Heated Oxygen Sensor and Oxygen Sensor Control, Checking|Page 2487
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Terminal 4 + socket 51

Wire resistance: max. 1.5ohms

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Also check the wire for short circuit to B+ and Ground (GND).

Specified value: infinite ohms

If no malfunctions are found in wires:

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Replace Engine Control Module (ECM) (J623) --> [ Engine Control Modules, Replacing ] See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Component Tests and General Diagnostics/Engine Control Modules, Replacing.

Oxygen Sensor Heater 2 (Z28) Test Sequence

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Disconnect 6-pin harness connector - A - to Heated Oxygen Sensor (HO2S) 2 (G108).

Heated Oxygen Sensor and Oxygen Sensor Control, Checking|Page 2489 > < Heated Oxygen Sensor and Oxygen Sensor Control, Checking|Page 2487