Passat L4-1.8L Turbo (AWM) (2004)
-
Use adapter cables from V.A.G 1594 to connect multimeter to terminals 3 + 4 (ECM connector) for voltage measurement.
-
Switch on ignition and measure primary voltage.
Specified value: 0.40 to 0.50 Volts
-
Switch ignition off.
Continued for all vehicles
If specified value is not obtained:
-
Test oxygen sensor wires
If specified value is obtained:
-
Replace Heated Oxygen Sensor (HO2S) -G39- before catalytic converter.
-
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
-
Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking oxygen sensor wires
-
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/Test Box, Connecting For Wiring Test
Vehicles with engine code AEB
-
Disconnect 4-pin harness connector (brown) to Heated Oxygen Sensor (HO2S) -G39- (-1-).