Jetta L4-1.8L Turbo (AWP) (2004)
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Connect multimeter for voltage measurement to terminals 3 + 4 of connector to Engine Control Module (ECM) and measure primary voltage.
Specified value: 0.40 to 0.50 Volts
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Switch ignition off.
If specified value is not obtained:
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Test oxygen sensor wires
If specified value is obtained:
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Replace Heated Oxygen Sensor (HO2S) -G39- Bank 1 before catalytic converter, item 8
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. See: 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: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking oxygen sensor wires
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Connect test box to control module wiring harness, connect test box for wiring test. See: Testing and Inspection/Reading and Clearing Diagnostic
Trouble Codes/Scan Tool Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test
Vehicles with engine code AWD
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Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 3 + socket 51
Terminal 4 + socket 70
Wire resistance: max: 1.5 Ohms
Vehicles with engine code AWP, AWW