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 test results must reach the specified value or must be within the min.- and max.- limits.
Requirement
Coolant temperature must be at least 80 degree C, Diagnostic mode 1: Check measured values; PID 5, Coolant temperature.
Procedure
- Connect diagnostic tester Scan Tool 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".
Output of oxygen sensor signals
- Select desired output of oxygen sensor signals "Test-ID XX".
*) V = Voltage in Volts (oxygen sensor signal)
**) t = Time in seconds
- End diagnosis and switch ignition off.
Evaluation Test-ID 01: Rich To Lean Sensor Barrier Voltage
If specified value is not obtained:
- Replace respective oxygen sensor:
- Heated Oxygen Sensor (HO2S) -G39-, bank 1
- Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, bank 2
- Heated Oxygen Sensor (HO2S) 2 -G108-, bank 1
- Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, bank 2
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Readiness Code
Evaluation Test-ID 02: Lean To Rich Sensor Barrier Voltage
If specified value is not obtained:
- Replace respective oxygen sensor:
- Heated Oxygen Sensor (HO2S) -G39-, bank 1
- Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, bank 2
- Heated Oxygen Sensor (HO2S) 2 -G108-, bank 1
- Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, bank 2
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Readiness Code
Evaluation test-ID 07: Minimum voltage at sensor for test cycle
If the specified value is not reached:
- Short circuit to Ground (GND) or open circuit in wiring:
- Check oxygen sensor and oxygen sensor control:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor and oxygen sensor control before catalytic converter, checking.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor and oxygen sensor control behind catalytic converter, checking. Testing and Inspection
If the specified value is exceeded:
- Oxygen sensor not ready for operation
- Oxygen sensor heater faulty.
- Check oxygen sensor heater:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor heater for oxygen sensor before catalytic converter.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor heater for oxygen sensor behind catalytic converter, checking.
- Short circuit to B+ or open circuit in wiring:
- Check oxygen sensor and oxygen sensor control:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor and oxygen sensor control before catalytic converter.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor and oxygen sensor control behind catalytic converter.
Evaluation Test-ID 08: 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:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor heater for oxygen sensor before catalytic converter, checking.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor heater for oxygen sensor behind catalytic converter.
- Short circuit to Ground (GND) or open circuit in wiring:
- Check oxygen sensor and oxygen sensor control:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor and oxygen sensor control before catalytic converter,.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor and oxygen sensor control behind catalytic converter.
If the specified value is exceeded:
- Short circuit to B+ or open circuit in wiring:
- Check oxygen sensor and oxygen sensor control:
- Bank 1 sensor 1 and Bank 2 sensor 1, oxygen sensor and oxygen sensor control before catalytic converter.
- Bank 1 sensor 2 and Bank 2 sensor 2, oxygen sensor and oxygen sensor control behind catalytic converter.