Jetta L4-2.0L (BEV) (2004)
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Remove protective cover -1- and disconnect 6-pin harness connector (black) -3- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.
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Check resistance for sensor heater at connector to oxygen sensor terminal 3 + 4.
Specified value: 2.5 to 10.0 Ohms (at room temperature)
If specified value is not obtained:
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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.
If specified value is obtained:
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Check Ground (GND) activation of oxygen sensor heater.
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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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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 4 + socket 5
Wire resistance: max. 1.5 Ohms
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Check wires for short circuit to B+ and to Ground (GND).