New Beetle L4-2.0L (AZG) (2003)
-
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
-
Also check wires for short circuit to B+ and Ground (GND). Specified value: Infinite Ohms
If no malfunctions are found in wires:
-
Replace Heated Oxygen Sensor (HO2S) 1 Bank 1 -G39- before catalytic converter, item 9.
-
Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
-
Generate readiness code. See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Function test (Vehicles with engine code AVH, AZG, BDC)
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 the lambda test results and check whether the specified values are being reached, Diagnostic mode 5: Check output of oxygen sensor
signals.
-
End diagnosis and switch ignition off.
-
Test oxygen sensor wires.
Checking oxygen sensor wires
-
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/With Generic Scan Tool/Test Box, Connecting For Wiring
Test
-
Unscrew protective cover (arrows) and disconnect 6-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.
-
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
-
Terminal 6 + socket 52
-
Wire resistance: max. 1.5 Ohms