Oxygen Sensor Behind Three Way Catalytic Converter G130, Checking
Oxygen Sensor Behind Three Way Catalytic Converter G130, Checking
The following procedure is used to diagnose both Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131
NOTE:
- Vehicle must be raised before the electrical connector of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 is accessible.
- When servicing terminals 3 and 4 in the electrical harness connector of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131, use only gold-plated terminals.
Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.
Test requirements
- The Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 fuses OK.
- Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater Z29 and Oxygen Sensor (O2S) 2 (behind Three Way Catalytic Converter (TWC)) Heater Z30 OK. Refer to.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, selector lever in position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Exhaust system between catalytic converter and cylinder head properly sealed.
- Coolant Temperature at least 80 degrees C.
Test procedure
- Perform a preliminary check to verify the customers complaint. Preliminary Check
Function test
- Perform the function test in Diagnostic Mode 06. Diagnostic Mode 06 - Read Test Results For Specific Diagnostic Functions
- End diagnosis and switch ignition off.
If the specified values are not obtained:
Start diagnosis
- Disconnect the brown Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector - 1 - or Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 - 3 -.
Checking primary voltage
- Switch the ignition on.
- Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 or Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector terminals 3 to 4 for voltage.
Specified value: 0.400 to 0.500 Volts
- Switch the ignition off.
If the specified value was obtained:
- Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 or Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 Engine Mechanical, Fuel Injection Ignition.
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
- Install the test box.
If the manufacturers test box is not being used. Perform the following step.
- Remove the Motronic Engine Control Module (ECM) J623.
- Using a Multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 or Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector T94 terminals for an open circuit.
Oxygen Sensor (O2S) G130 Motronic Engine Control Module
electrical harness connector (ECM) J623 electrical connector
terminals T94 terminals or test box sockets
3 76
4 77
Oxygen Sensor (O2S) 2 G131 Motronic Engine Control Module
electrical harness connector (ECM) J623 electrical connector
terminals T94 terminals or test box sockets
3 54
4 55
Specified value: 1.5 Ohms Max.
If the specification was not obtained:
- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
- Erase the DTC memory. Diagnostic Modes 01 - 09.
- Perform a road test to verify repair.
If the DTC does not return:
- Repair complete, Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
- End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
- Replace the Motronic Engine Control Module (ECM) J623.
- Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory. Diagnostic Modes 01 - 09
2. If necessary, erase the DTC memory. Diagnostic Modes 01 - 09
3. If the DTC memory was erased, generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
End of Diagnosis