Beetle L4-1781cc 1.8L Turbo (APH) (1999)
-
Select the following output of oxygen sensor signals and check whether the specified values are being reached, Diagnostic mode 5: Check output
of oxygen sensor signals. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Read Measuring Value
Blocks (Function 08)/With Generic Scan Tool/Diagnostic Mode 5: Check Output of Oxygen Sensor Signals
If specified values are obtained:
-
End diagnosis and switch ignition off.
If specified values are not obtained:
-
Test oxygen sensor wires.
Checking oxygen sensor wires
-
Unscrew protective cover (arrows) and disconnect 6-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic
converter.
-
Connect test box to control module wiring harness, connect test box for wiring test.
-
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
-
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) -G39- Bank 1 before catalytic converter, item 8
-
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/Read Measuring Value Blocks (Function 08)/With Generic Scan
Tool/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