New Beetle L4-2.0L (AVH) (2005)
-
Check wires between test box and 4-pin connector (to control module) for open circuit according to wiring diagram.
Terminal 3 + socket 25
Terminal 4 + socket 26
Wire resistance: max. 1.5 Ohms
-
Check wires for short circuit to B+ and to Ground (GND).
Specified value: Infinite Ohms
If no malfunctions are found in wires:
-
Replace Heated Oxygen Sensor (HO2S) -G39-.
-
Erase DTC memory of Engine Control Module (ECM) => page ST-29. 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
Function test (Vehicles with engine code AVH, AZG, BDC, BEV, BGD)
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.
-
Select output of oxygen sensor signals and check whether the specified values are being reached => page ST-31. Diagnostic mode 5: Check output
of oxygen sensor signals.
-
End diagnosis and switch ignition off.
If specified values are not obtained:
-
Test oxygen sensor wires => page 24-180.
Checking oxygen sensor wires
-
Connect test box to control module wiring harness => page ST-11. 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
-
Remove protective cover (arrows) and disconnect 6-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) G39- before catalytic
converter.