Operation CHARM: Car repair manuals for everyone.
Hosted by mcallihan.com
Home >> Audi >> 2007 >> RS4 Quattro Sedan (8EC) V8-4.2L (BNS) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Component Tests (SAE Code Tests) >> Oxygen Sensor (O2S) Behind (TWC) G130 and (O2S) Regulation Behind Catalytic Converter, Checking

Oxygen Sensor (O2S) Behind (TWC) G130 and (O2S) Regulation Behind Catalytic Converter, Checking



Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 And Oxygen Sensor Regulation Behind Catalytic Converter, Checking

The following procedure is used to diagnose Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 which is controlled by the Motronic Engine Control Module (ECM) J623.

NOTE: When servicing the electrical harness connector terminals of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 , use only gold-plated terminals.

Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.

Test requirements
- The Motronic Engine Control Module (ECM) J623 fuses OK.
- Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater Z29 OK.
- 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.

Function test
- Perform the function test located in diagnostic mode 06.

If specified values are obtained:
- End diagnosis and switch the ignition off.

If the specified values are not obtained:

Procedure
- Raise the vehicle.







- Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector - 1 -.

Checking primary voltage
- Crank the engine.







- Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 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.

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) J623 electrical harness connector T94 terminals for an open circuit.

Oxygen Sensor (O2S) Behind Motronic Engine Control
Three Way Catalytic Converter Module (ECM) J623
(TWC) G130 electrical harness electrical connector T94
connector terminals terminals or test box sockets
3 76
4 77

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, lose or broken terminals.
- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring:
- Replace the Motronic Engine Control Module (ECM) J623.

Final procedures
After repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.

- End of diagnosis.


Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 and oxygen sensor regulation behind catalytic converter, checking

The following procedure is used to diagnose Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 which is controlled by the Engine Control Module (ECM) 2 J624.

NOTE: When servicing the electrical harness connector terminals of the 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 Engine Control Module (ECM) 2 J624 fuses OK.
- Oxygen Sensor (O2S) 2 (behind Three Way Catalytic Converter (TWC)) Heater Z30 OK.
- 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.

Function test
- Perform the function test located in diagnostic mode 06.

If specified values are obtained:
- End diagnosis and switch the ignition off.

If the specified values are not obtained:

Procedure
- Raise the vehicle.







- Disconnect the 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) 2 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) 2 Behind Three Way Catalytic Converter (TWC) G131.

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 Engine Control Module (ECM) 2 J624.







- Using a Multimeter, check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector terminals to the Engine Control Module (ECM) 2 J624 electrical harness connector T94 terminals for an open circuit.

Oxygen Sensor (O2S) 2 Behind Engine Control Module
Three Way Catalytic Converter (ECM) 2 J624 electrical
(TWC) G131 electrical harness connector T94 terminals
connector terminals or test box sockets
3 76
4 77


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, lose or broken terminals.
- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring:
- Replace the Engine Control Module (ECM) 2 J624.

Final procedures
After repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.

- End of diagnosis.
pro multis · About Operation CHARM