Diagnostic Mode 5: Check Output of Oxygen Sensor Signals

Diagnostic mode 5: Check output of oxygen sensor signals

Function
The static values of the oxygen sensors are indicated via this diagnostic mode.

The values of the individual oxygen sensor signal outputs must reach the specified value or must be within the min.- and max.- limits.

Requirements
- Exhaust system must be properly sealed between catalytic converter module and cylinder head.
- There must not be any DTCs stored in DTC memory, Diagnostic mode 3: Check DTC memory. Diagnostic Mode 3: Check DTC Memory
- Coolant temperature must be at least 80 degrees C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. Diagnostic Mode 1: Check Measuring Values

Work procedure
- Connect diagnostic tester. Diagnostic Tester, Connecting
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 5: Check output of oxygen sensor signals".
- Select the desired output of oxygen sensor signals "Test-ID XX".

Test-ID: Evaluation of output of oxygen sensor signals
01 Bank 1 and 2, sensor 2: Rich to lean sensor barrier voltage
02 Bank 1 and 2, sensor 2: Lean to rich sensor barrier voltage
07 Bank 1 and 2, sensor 2: Minimum voltage at sensor for test cycle
08 Bank 1 and 2, sensor 2: Maximum voltage at sensor for test cycle
129 Bank 1 and 2, sensor 1: Actual value of oxygen sensor voltage
130 Bank 1 and 2, sensor 1: Control barrier voltage
131 Bank 1 and 2, sensor 1: Dynamic value
132 Bank 1 and 2, sensor 1: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) (bank 1 and 2, sensor 2)

NOTE:
- Bank 1 = Cylinder bank 1, in direction of travel, right
- Bank 2 = Cylinder bank 2, in direction of travel, left
- When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
- If either the VAG1551/1552 Scan Tool (ST) or VAS5051/5052 Vehicle Diagnostic, Testing and Information System is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing buttons 1, 2, 5 and 6:
- Button 1 = Bank 1 sensor 1,
- Button 2 = Bank 1 sensor 2,
- Button 5 = Bank 2 sensor 1,
- Button 6 = Bank 2 sensor 2.

- End diagnostic and switch ignition off.

Evaluation test-ID 01 Bank 1 and 2, sensor 2: Rich to lean sensor barrier voltage

Oxygen sensor Specified value:
Bank 1 sensor 2 Fixed value: 0.631 V
Bank 2 sensor 2 Fixed value: 0.631 V

If specified value is not obtained:
- Replace the respective oxygen sensor:
- Bank 1 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC)-G130-, item 6
- Bank 2 Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, item 10

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 02 Bank 1 and 2, sensor 2: Lean to rich sensor barrier voltage

Oxygen sensor Specified value:
Bank 1 sensor 2 Fixed value: 0.631 V
Bank 2 sensor 2 Fixed value: 0.631 V

If specified value is not obtained:
- Replace the respective oxygen sensor:
- Bank 1 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC)-G130-, item 6
- Bank 2 Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, item 10

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 07 Bank 1 and 2, sensor 2: Minimum voltage at sensor for test cycle

If the specified value is exceeded:
- Oxygen sensor not ready for operation
- Oxygen sensor heater faulty:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Oxygen Sensor Heater For O2 Sensors After (TWC), Checking

- Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensors and O2 Sensor Regulation After (TWC), checking

Evaluation test-ID 08 Bank 1 and 2, sensor 2: Maximum voltage at sensor for test cycle

If the specified value is not reached:
- Oxygen sensor not ready for operation
- Oxygen sensor heater faulty:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC). Oxygen Sensor Heater For O2 Sensors After (TWC), Checking

- Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensors and O2 Sensor Regulation After (TWC), checking

If the specified value is exceeded:
- Short circuit to B+ in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). Oxygen Sensors and O2 Sensor Regulation After (TWC), checking

Evaluation test-ID 129 Bank 1 and 2, sensor 1: Actual value of oxygen sensor voltage

If specified values are not obtained:
- Replace the respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-, item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-, item 9

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 130 Bank 1 and 2, sensor 1: Control barrier voltage

If specified values are not obtained:
- Replace the respective oxygen sensor:
- Bank 1 Heated Oxygen Sensor (HO2S) -G39-, item 3
- Bank 2 Heated Oxygen Sensor (HO2S) 2 -G108-, item 9

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 132 Bank 1 and 2, sensor 1: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) (bank 1 and 2, sensor 2)