Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results

Diagnostic Modes 01 - 09

Diagnostic Mode 05 - Read Oxygen Sensor Monitoring Test Results

The information provided in Modes 01 through 09 displays the various levels of emission related data that may be monitored, as well as the ability to retrieve and read stored DTC trouble codes, erase stored DTC trouble codes, generate readiness codes, and select the various PIDs and Test-IDs used within the modes to monitor the engine, and emission related component parameters.

• Depending on scan tool and protocol used, the information in diagnostic mode 01 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), or On-Board Diagnostic Monitor Identifier (OBDMID).

• Mode 05 may not be supported on all systems. On systems where Diagnostic Mode 05 is not supported, refer to Diagnostic Mode 6 for Oxygen Sensor Monitoring Test Results. Diagnostic Mode 06 - Read Test Results For Specific Diagnostic Functions

• This diagnostic mode can only be selected with module number "10 - Engine electronics" and "11 - Engine electronics II".

Requirements

• Exhaust system must be properly sealed between catalytic converters and cylinder heads.

• There must not be any DTCs stored in DTC memory => [ Diagnostic Mode 03 - Read DTC Memory ] , Diagnostic mode 3: Check DTC memory.

• Coolant temperature must be at least 80° C => [ Diagnostic Mode 01 - Read Current System Data ] , Diagnostic mode 1: Check measured values; PID 05, Coolant temperature.

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.

Work Procedure

- Connect diagnostic tester.

- Start engine and let run at idle.

- Under address word 33, select "Diagnostic mode 5: Check Lambda test results".

- Select desired lambda test results "Test-ID XX".

• Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel.

• Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.

- End diagnosis and switch ignition off.

Evaluation Test 07 - Minimum Voltage At Sensor for Test Cycle Evaluation Test 07 - Minimum Voltage At Sensor for Test Cycle

If specification is exceeded:

• Oxygen sensor not ready for operation

• Oxygen sensor heater faulty:

- Oxygen sensor heating for sensor behind catalytic converter, checking => [ Oxygen Sensor Heaters After Catalytic Converter, Checking ] Component Tests (VAG Code Tests).

• Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire:

- Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking => [ Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking ] Component Tests (VAG Code Tests).

Evaluation Test 08 - Maximum Voltage At Sensor for Test Cycle

If specification is not obtained:

• Oxygen sensor not ready for operation

• Oxygen sensor heater faulty:

- Oxygen sensor heating for sensor behind catalytic converter, checking => [ Oxygen Sensor Heaters After Catalytic Converter, Checking ] Component Tests (VAG Code Tests).

• Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire:

- Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking => [ Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking ] Component Tests (VAG Code Tests).

If specification is exceeded:

• Short circuit to B+ in oxygen sensor or in wire:

- Heated Oxygen Sensor (HO2S) and oxygen sensor control after catalytic converter, checking => [ Oxygen Sensors and Oxygen Sensor Regulation after Catalytic Converter, Checking ] Component Tests (VAG Code Tests).

Evaluation Test 129 - Oxygen Sensor Value

If specifications are not obtained:

- Replace respective oxygen sensor. Refer to Repair Information.

- Erase DTC memory of Engine Control Module => [ Diagnostic Mode 04 - Erase DTC Memory ] , Diagnostic mode 4: Reset/erase diagnostic data.

- Generate readiness code => [ Readiness Code, Generating ] Monitors, Trips, Drive Cycles and Readiness Codes.

Diagnostic Mode 6 - Checking Test Results of Components Not Continuously Monitored

• This diagnostic mode can only be selected with module number "10 - Engine electronics" and "11 - Engine electronics II".

Function

This diagnostic mode displays the test results of emission relevant components and systems which are not continuously monitored.

The values of the individual test results must reach the specified value or must be within the min.- and max.- limits.

• Cylinder bank 1 with cylinders 1 through 6 is located at right in direction of travel.

• Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.