Mode 5: Check oxygen sensor output signals: Procedure
- Connect diagnostic tester. See DIAGNOSTIC TESTER, CONNECTING .
- Start engine and let run at idle.
- In diagnostic function "33 - OBD", select "Mode 5: Check output of oxygen sensor signals".
- Via the following table, select the desired output of oxygen sensor signals according to Test ID (Test Identification), e.g. "01: Rich to lean sensor barrier voltage".
- Check specified values at idle.
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 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.
MODE 5: OXYGEN SENSOR SIGNALS
| Test-ID(1) | Diagnostic text | Evaluation | ||
|---|---|---|---|---|
| 01: | Rich to lean sensor barrier voltage | EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE | ||
| 02: | Lean to rich sensor barrier voltage | EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE | ||
| 07: | Minimum voltage at sensor for test cycle | EVALUATION TEST-ID 07: MINIMUM VOLTAGE AT SENSOR FOR TEST CYCLE | ||
| 08: | Maximum voltage at sensor for test cycle | EVALUATION TEST-ID 08: MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE | ||
| 129: | Current value of oxygen sensor signal | |||
| 130: | Specified value of oxygen sensor signal | |||
| 131: | Dynamic value | |||
| 132: | Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter | |||
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- End diagnosis and switch ignition off.