Diagnostic Mode 5: Check Output of Oxygen Sensor Signals

Diagnostic Mode 5: Check Output Of Oxygen Sensor Signals

NOTE: This diagnostic mode can only be selected with Module number 10 - Engine Electronics.

Function
The static values of the oxygen sensors are indicated via this diagnostic mode.
The values of the individual oxygen sensor test results must reach the specified value or must be within the min.- and max.- limits.

Requirements
- Exhaust system must be properly sealed between catalytic converter 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 measured values; PID 5, Coolant temperature. Diagnostic Mode 1: Check Measured 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 desired output of oxygen sensor signals "Test-ID XX".

NOTE:
- When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
- If either the V.A.G 1551/1552 Scan Tool (ST) or the VAS 5051/5052 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 and 2:
- Button 1 = Bank 1 sensor 1,
- Button 2 = Bank 1 sensor 2,

Evaluation of output of oxygen sensor signals:
- Test-ID 01 Bank 1 Sensor 2
- Test-ID 02 Bank 1 Sensor 2
- Test-ID 07 Bank 1 Sensor 2
- Test-ID 08 Bank 1 Sensor 2
- Test-ID 129 Bank 1 Sensor 1
- Test-ID 130 Bank 1 Sensor 1
- Test-ID 131 Bank 1 Sensor 1
- Test-ID 132 Bank 1 Sensor 1

- End diagnosis and switch ignition off.

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

Vehicles with engine Vehicles with engine
code AWD code AWP, AWW
Specified value: Specified value:
smaller than 0.652 V smaller than 0.652 V

If specified values are not obtained:
- Replace Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G130- bank 1, item 10.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

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

Vehicles with engine Vehicles with engine
code AWD code AWP, AWW
Specified value: Specified value:
larger than 0.652 V larger than 0.652 V

If specified values are not obtained:
- Replace Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G130- bank 1.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

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

If specified value is not reached:
- Short circuit to Ground (GND) in oxygen sensor or in wire:
- Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC).

If 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).

- 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).

Evaluation test-ID 08 Bank 1 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).

If 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).

Evaluation test-ID 129 Bank 1 Sensor 1: Actual value of oxygen sensor voltage

If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) -G39- bank 1 before catalytic converter.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 130 Bank 1 Sensor 1: Control barrier voltage

If specified values are not obtained:
- Replace Heated Oxygen Sensor (HO2S) 1 -G39- bank 1 before catalytic converter.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Evaluation test-ID 131 Bank 1 Sensor 1: Dynamic value

If specified values are not obtained:
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

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