A8L Quattro Sedan W12-6.0L (BSB) (2005)
Function Test
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Select the oxygen sensor test results and check whether the specified values are being reached => [ Diagnostic Mode 05 - Read Oxygen Sensor
Monitoring Test Results ] See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 -
09, Diagnostic mode 5: Check oxygen sensor test results.
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End diagnosis and switch ignition off.
If the specifications are not obtained:
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Check oxygen sensor wires to control module according to wiring diagram.
Checking Oxygen Sensor Wires to Control Module
Cylinder bank 1
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Connect test box to Engine Control Module (ECM) (J623) wiring harness on connecting test box for wiring test, refer to Repair Manual,
Cylinder bank 2
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Connect test box to Engine Control Module (ECM) 2 (J624) wiring harness on connecting test box for wiring test, refer to Repair Manual,
Cylinder bank 1 and 2
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Disconnect corresponding 6-pin harness connector to the oxygen sensor to be tested: Component location
‹› Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel.
‹› Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.
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Check wires between test box and 6-pin connector to Engine Control Module for open circuit according to wiring diagram. Wiring resistance:
max. 1.5 ohms
Oxygen sensor connector