Touareg V8-4.2L (BHX) (2004)
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Select the output of oxygen sensor signals and check whether the specified values are being reached , Diagnostic mode 5: Check output of oxygen
sensor signals.
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End diagnosis and switch ignition off.
If specified values are not obtained:
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Check oxygen sensor wires according to wiring diagram.
Checking oxygen sensor wires
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Connect test box to control module wiring harness , connect test box for wiring test.
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Disconnect 6-pin harness connector to the respective oxygen sensor:
‹› Heated Oxygen Sensor (HO2S) (G39), bank 1, 6-pin harness connector - 2 -,
‹› Heated Oxygen Sensor (HO2S) 2 (G108), bank 2, 6-pin harness connector - 4 -.
‹› Bank 1 = Cylinder bank 1, in direction of travel, right
‹› Bank 2 = Cylinder bank 2, in direction of travel, left
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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Wire resistance: max. 1.5 ohms