Jetta L4-2.0L (BEV) (2004)
Terminal 4 + socket 26
Wire resistance: max. 1.5 Ohms
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Check wires for short circuit to B+ and to Ground (GND).
Specified value: Infinite Ohms
If no malfunctions are found in wires:
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Replace Heated Oxygen Sensor (HO2S) 1 -G39- bank 1 before catalytic converter.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase Diagnostic Data
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Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.
Work sequence (vehicles with engine code AVH, AZG, BEV)
NOTE: The oxygen sensor before catalytic converter has a static regulation and can be differentiated from the oxygen sensor behind catalytic converter
via a 6-pin connector.
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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. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan
Tool/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.
Checking oxygen sensor wires
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Connect test box to control module wiring harness, connect test box for wiring test. See: Computers and Control Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test
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Remove protective cover (arrows) and disconnect 6-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) - G39- before catalytic
converter.
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Check wires between test box and 6-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 1 + socket 70
Terminal 2 + socket 71
Terminal 5 + socket 51