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 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".

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

If specified values are not obtained:
- Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-.
- 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

If specified values are not obtained:
- Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-.
- 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 the 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 the specified value is exceeded:
- Oxygen sensor not ready for operation
- Oxygen sensor heater malfunctioning:
- 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). Oxygen Sensor and Oxygen Sensor Control Behind Three Way Catalytic Converter (TWC), Checking

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 malfunctioning:
- Check oxygen sensor heater for Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC).
- 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 Sensor and Oxygen Sensor Control Behind Three Way Catalytic Converter (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 Sensor and Oxygen Sensor Control Behind Three Way Catalytic Converter (TWC), Checking

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-.
- 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