Diagnostic mode 5: Check output of oxygen sensor signals: Notes
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 outputs of oxygen sensor signals 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. Refer to Diagnostic mode 3: Check DTC Memory
- Coolant temperature must be at least 80 ° C. Refer to Diagnostic mode 1: Check measured values
Work procedure
- Connect diagnostic tester. Refer to 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".
NOTE:
- When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1".
Vehicles with engine codes AFP and BDF:
- 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.
Vehicles with engine code BJS:
- If the Vehicle Diagnostic, Testing and Information System VAS 5051 or the Vehicle Diagnostic and Information System VAS 5052 is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing button 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.
| Test-ID: | Evaluation of oxygen sensor signal outputs |
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| 01 | Rich to lean sensor barrier voltage | Refer to Evaluation test-ID 01: Rich to lean sensor barrier voltage ST-35 | |||||||||
| 02 | Lean to rich sensor barrier voltage | Refer to Evaluation test-ID 02: Lean to rich sensor barrier voltage ST-37 | |||||||||
| 07 | Minimum voltage at sensor for test cycle | Refer to Evaluation test-ID 07: Minimum voltage at sensor for test cycle ST-38 | |||||||||
| 08 | Maximum voltage at sensor for test cycle | Refer to Evaluation test-ID 08: Maximum voltage at sensor for test cycle ST-40 | |||||||||
| Test-ID: | Evaluation of oxygen sensor signal outputs |
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| 129 | Actual value of oxygen sensor voltage | Refer to Evaluation test-ID 129: Actual value of oxygen sensor voltage ST-41 | |||||||||
| 130 | Control barrier voltage | Refer to Evaluation test-ID 130: Control barrier voltage ST-43 | |||||||||
| 131 | Dynamic value | Refer to Evaluation test-ID 131: Dynamic value ST-44 | |||||||||
| 132 | Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) | Refer to Evaluation test-ID 132: Oxygen sensor shift via oxygen sensor control behind Three Way Catalytic Converter (TWC) ST-46 | |||||||||
- End diagnosis and switch ignition off.