On Board Diagnostic (OBD) - Generic Scan Tool - 4.2l v8 5v - Art, Awn, Bbd Audi S6 C5

Characteristics of On Board Diagnostic (OBD)

The Engine Control Module (Motronic Engine Control Module -J220-) is equipped with DTC memory.

Malfunction recognition

If malfunctions occur at the exhaust relevant systems or components, they are stored in DTC memory with a description of the malfunction type.

The stored malfunctions can be checked with a standard diagnostic tester. See MODE 3: CHECK DTC MEMORY .

The Engine Control Module (ECM) differentiates between different DTCs after evaluating the information. See DIAGNOSTIC TROUBLE CODE (DTC) TABLES .

If the ECM recognizes malfunctions that lead to a worsening of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (MIL) -K83- in the instrument cluster. See MALFUNCTION LAMP FOR ON BOARD DIAGNOSTIC (OBD)/MALFUNCTION INDICATOR LAMP (MIL) -K83- IN INSTRUMENT CLUSTER .

E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster. See ELECTRONIC POWER CONTROL (EPC) WARNING LAMP -K132- IN INSTRUMENT CLUSTER .

When disconnecting harness connectors from Engine Control Module (ECM) or when disconnecting battery, all adaptation values in the control module are erased. DTC memory content will remain intact however. After re - connecting harness connectors or battery, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Identification of Engine Control Module (ECM)

The control module version is displayed when "Mode 9: Vehicle information" under address word 33. See MODE 9: VEHICLE INFORMATION .

Engine Control Module (ECM) equipment

ENGINE IDENTIFICATION

Malfunction lamp for On Board Diagnostic (OBD)/Malfunction Indicator Lamp (MIL) -K83- in instrument cluster

If the ECM recognizes malfunctions that lead to a worsening of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (MIL) -K83- in the instrument cluster.

Function

After switching on the ignition, the ECM switches on the Malfunction Indicator Lamp (MIL) -K83-. Shortly after engine is started, the Malfunction Indicator Lamp (MIL) -K83- will go out. This requires, first of all, that the Engine Control Module (ECM) does not detect a malfunction that worsens the emissions values and, secondly, that activation of the lamp by the Engine Control Module (ECM) is OK.

Malfunction messages

If malfunctions that worsen emissions are recognized during operation of the engine, the ECM switches on the Malfunction Indicator Lamp (MIL) -K83-. An entry is made in DTC memory of ECM at the same time.

Malfunction Indicator Lamp (MIL) -K83- can be switched on to blinking or continuously lit. In any case the DTC memory must be checked and erased if necessary. See MODE 3: CHECK DTC MEMORY and MODE 4: RESET/ERASE DIAGNOSTIC DATA .

Continuously lit

There is a malfunction that causes increased emissions values. DTC memory of Engine Control Module (ECM) must be checked.

Blinking

There is a malfunction that causes damage to the catalytic converter in this driving condition (e.g. combustion misfire). In this case, vehicle must only be driven at reduced performance!

Note. Check DTC memory if there is a driveability problem or a customer complaint, but the Malfunction Indicator Lamp (MIL) -K83- is not lit. There may be DTCs stored that do not cause the exhaust MIL to light up immediately, but only after engine is started again and malfunction is recognized again.

Malfunction Indicator Lamp (MIL) function test

1. Switch ignition on. Warning lamp for On Board Diagnostic/Malfunction Indicator Lamp (MIL) -K83- must light up
2. Start engine. Shortly after engine is started, the Malfunction Indicator Lamp (MIL) -K83- will go out if there are no malfunctions stored in DTC memory that relate to emissions

If warning lamp does not light up at all

The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via wire connection or via CAN-Bus, depending on version.

1. Checking wire connections See appropriate System Wiring Diagram article.
2. Check terminal resistance for CAN-Bus. See «TERMINAL RESISTANCE FOR CAN-BUS, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__terminal-resistance-for-can-bus-checking) .

Electronic Power Control (EPC) Warning Lamp -K132- in instrument cluster

"EPC" is an abbreviation and stands for Electronic Power Control (E-gas).

Engine Control Module (ECM) checks all components that are important for function of the E-Gas system after ignition is switched on.

If malfunctions are recognized in the E-Gas system during operation of the engine, the Engine Control Module (ECM) switches on the Electronic Power Control (EPC) Warning Lamp -K132-. An entry is made in DTC memory of ECM at the same time.

1. Switch ignition on. Engine Control Module (ECM) switches EPC lamp on.
2. Start engine. Shortly after engine is started, the EPC warning lamp will go out if there are no malfunctions stored in DTC memory that relate to the E-gas system

If warning lamp does not light up at all

The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via wire connection or via CAN-Bus, depending on version.

1. Checking wire connections See appropriate System Wiring Diagram article.
2. Check terminal resistance for CAN-Bus. See «TERMINAL RESISTANCE FOR CAN-BUS, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__terminal-resistance-for-can-bus-checking) .

Safety precautions

If test and measuring equipment is required during road test, note the following

Special tools and equipment

1. Vehicle Diagnostic and Information System VAS 5052 with diagnostic wire VAS 5052/3

Test requirements

1. Fuses for engine electronics OK See appropriate Electrical Component Locator article.
2. Ground (GND) connections at engine and transmission OK
3. Battery voltage at least 12.7 V
4. Parking brake engaged.
5. Vehicles with automatic transmission: Selector lever in position "P" or "N".
6. Electrical consumers switched off (radiator fan must NOT run during test).
7. A/C switched off.

Work procedure

1. Switch ignition off.
2. Connect Vehicle Diagnostic and Information System VAS 5052 with diagnostic wire VAS 5052/3.

Note. If a malfunction message is displayed

See Operating instructions for Vehicle Diagnostic and Information System VAS 5052

Depending on the desired mode. See SELECT DIAGNOSTIC FUNCTION

1. Switch ignition on.
2. Start engine.

Select diagnostic function

1. After connecting the diagnostic tester and selecting diagnostic function "33 - OBD", several diagnostic modes can be selected.
2. The following diagnostic modes monitor all components and systems which influence the emission quality.

SELECTABLE DIAGNOSTIC MODES

Recommended special tools and equipment

1. VAG1598/31 test box

Scheme 127

Scheme 128

Scheme 129

1. Switch ignition off.
2. Pull off rubber seal of plenum chamber cover in direction of arrow.
3. Remove cover -1- toward front.
4. Remove cover for E-box, plenum chamber (arrows).
5. Using a screwdriver, carefully pry off retaining bracket (arrow).
6. Disengage connector catches (arrows) and disconnect harness connectors -1- and -2- from control module. NOTE: Adaptation values are erased when connector is disconnected from the Engine Control Module (ECM), DTC memory content remains intact.
7. Connect e.g. VAG1598/31 test box to connectors of wiring harness. Clamp test box Ground (GND) clip to Ground (GND) (arrow). Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box. CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test requirements.

Assembling

Assembly is performed in the reverse order of removal, noting the following

Final procedures

After connecting harness connectors to Engine Control Module (ECM), the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 1: Check measured values

In this diagnostic mode, all emissions -relevant measured values are displayed.

Test requirement

1. Coolant temperature at least 80 °C; "PID 05: Cooling fluid temperature".

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. In diagnostic function "33 - OBD", select "Mode 1: Check measuring values".
3. Select the desired measured value according to the PID (Parameter Identification), e.g. "PID 05. Cooling fluid temperature", via the following table.

Note. Specified values assigned to the measuring values are found in the corresponding component- and function tests. Bank 1 = cylinder bank 1 in direction of travel, right; Bank 2 = cylinder bank 2 in direction of travel, left. Measuring values of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and measuring values of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics".

DISPLAY MEASURING VALUES (MODE 1)

1. End diagnosis and switch ignition off.

Mode 2: Checking operating conditions

The operating conditions under which the Engine Control Module has detected and stored an emissions-relevant DTC are displayed in this diagnostic mode.

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. In diagnostic function "33 - OBD", select "Mode 2: Check operating conditions."
3. Select the desired operating condition via the following table according to the PID (Parameter Identification), e.g. "PID 05: Cooling fluid temperature".

Note. Bank 1 = cylinder bank 1 in direction of travel, right; Bank 2 = cylinder bank 2 in direction of travel, left. Measuring values of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and measuring values of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics".

DISPLAY OPERATING CONDITIONS (MODE 2)

If DTCs are displayed in "PID 02"

1. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

The following work steps must be performed in the described sequence after the malfunction(s) have been repaired

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 3: Check DTC Memory

This diagnostic mode indicates all stored DTCs of components and systems which are emission relevant.

Malfunction Indicator Lamp (MIL) -K83- in instrument cluster lights up for one DTC entry.

SAE Diagnostic Trouble Codes (DTCs)

The DTC consists of a 5-digit alpha-numeric value with the following meaning

SAE DIAGNOSTIC TROUBLE CODES

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle. NOTE: If the engine does not start up, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.
3. In diagnostic function "33 - OBD", select "Mode 3: Check DTC memory."

The number of stored malfunctions or "0 malfunctions detected" is displayed.

Note. The DTC tables are sorted by SAE code. Stored malfunctions of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and stored malfunctions of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics". In addition, "emission"-relevant malfunctions are indicated in the instrument cluster via the Malfunction Indicator Lamp (MIL) -K83-. E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster. In "Mode 2: Check operating conditions", it can be determined at which operating condition the Engine Control Module detected and stored a malfunction. See MODE 2: CHECKING OPERATING CONDITIONS .

SAE DIAGNOSTIC TROUBLE EXAMPLE

1. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

The following work steps must be performed in the described sequence after the malfunction(s) have been repaired

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 4: Reset/erase diagnostic data

The following functions are performed in this diagnostic mode

1. All emission relevant malfunctions in DTC memory will be erased.
2. The operating conditions at which a malfunction was stored will be reset. See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-2-checking-operating-conditions) .
3. All adaptation values will be reset.
4. All test results of the diagnostic functions of control module will be reset.

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle.
3. In diagnostic function "33 - OBD", first select "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
4. Then select "Mode 4: Reset/erase diagnostic data". Display: "Diagnostic data are being erased"

DTC memory is erased.

1. End diagnosis and switch ignition off.

Mode 5: Check oxygen sensor output signals

The static values of the oxygen sensors are indicated in this diagnostic mode.

The values of the individual oxygen sensor signal outputs must reach the specified value or must be within the min.- and max.- limits.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C. See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle.
3. In diagnostic function "33 - OBD", select "Mode 5: Check output of oxygen sensor signals".
4. 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".
5. 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.

TEST-ID EVALUATION (MODE 5)

1. End diagnosis and switch ignition off.

Evaluation test-ID 01: Rich to lean sensor barrier voltage

TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE VALUES

If specified value is not obtained

1. Replace respective oxygen sensor. See «OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Evaluation test-ID 02: Lean to rich sensor barrier voltage

TEST-ID 02: LEAN TO RICH SENSOR BARRIER VOLTAGE VALUES

If specified value is not obtained

1. Replace respective oxygen sensor. See «OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Evaluation test-ID 07: Minimum voltage at sensor for test cycle

TEST-ID 07: MINIMUM VOLTAGE AT SENSOR FOR TEST CYCLE VALUES

If the specified value is not reached

1. Short circuit to Ground (GND) in oxygen sensor or in wire.

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__oxygen-sensors-and-oxygen-sensor-control) .

If the specified value is exceeded

1. Oxygen sensor not ready for operation
2. Oxygen sensor heater faulty

1. Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire.

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__oxygen-sensors-and-oxygen-sensor-control) .

Evaluation test-ID 08: Maximum voltage at sensor for test cycle

TEST-ID 08: MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE VALUES

If the specification is exceeded or not reached

1. Oxygen sensor not ready for operation
2. Oxygen sensor heater faulty

1. Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire.

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__oxygen-sensors-and-oxygen-sensor-control) .

Evaluation test-ID 09: Time period between sensor shift procedures (half value)

TEST-ID 09: TIME PERIOD BETWEEN SENSOR SHIFT PROCEDURES (HALF VALUE) VALUES

If the specified value is not reached

1. Short circuit in oxygen sensor or in wire

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

If the specified value is exceeded

1. Oxygen sensor faulty

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. Oxygen sensor is aged

1. Replace respective oxygen sensor before catalytic converter. See «OXYGEN SENSORS BEFORE CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Evaluation test-ID 48: "Rich"-shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter

TEST-ID 48: RICH-SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VALUES

If the specified value is exceeded

1. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire.
2. Oxygen sensor faulty

1. Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__oxygen-sensors-and-oxygen-sensor-control) .

1. Mixture too lean

1. Check fuel pressure regulator and residual pressure. See «FUEL PRESSURE REGULATOR AND RESIDUAL PRESSURE, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check fuel injectors. See «FUEL INJECTORS, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
3. Check intake system for leaks (false air). See «CHECKING INTAKE SYSTEM FOR LEAKS (UNMETERED AIR)»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
4. Check Fuel Pump (FP). See «FUEL PUMP (FP), ELECTRICAL TESTING»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
5. Check exhaust system for proper seal. See «EXHAUST SYSTEM, CHECKING FOR PROPER SEAL»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd__exhaust-system-checking-for-proper-seal) .
6. Check Secondary Air Injection (AIR) system for proper seal. See «CHECKING SECONDARY AIR SYSTEM FOR PROPER SEAL»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd__checking-secondary-air-system-for-proper) .
7. Check vacuum lines for proper seal.

Evaluation test-ID 49: "Lean" -shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter

TEST-ID 49: LEAN-SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VALUES

If the specified value is exceeded

1. Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire.
2. Oxygen sensor faulty

1. Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd__oxygen-sensors-and-oxygen-sensor-control) .

1. Mixture too rich

1. Check fuel pressure regulator and residual pressure. See «FUEL PRESSURE REGULATOR AND RESIDUAL PRESSURE, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Check fuel injectors. See «FUEL INJECTORS, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
3. Check Evaporative Emission (EVAP) canister purge regulator valve -N80-. See «CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Evaluation test-ID 50: Time period between sensor shift procedures

TEST-ID 50: TIME PERIOD BETWEEN SENSOR SHIFT PROCEDURES

If the specified value is not reached

1. Short circuit in oxygen sensor or in wire

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

If the specified value is exceeded

1. Oxygen sensor faulty

1. Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. Oxygen sensor is aged

1. Replace respective oxygen sensor before catalytic converter. See «OXYGEN SENSORS BEFORE CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 6: Check test results of components that are not continuously monitored

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.

MODE 6 TEST-ID COMPONENTS

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C. See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test

1. Engine speed 1800 to 2200 RPM; "PID 12: Engine rotations per minute". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
2. Vehicle speed constant 90 km/h; "PID 13: Vehicle speed". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Let engine run at idle.
2. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
3. Select the "Test-ID 01: Catalytic converter".
4. 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.

CATALYTIC CONVERTER SPECIFIED VALUES

1. End diagnosis and switch ignition off.

If the specified values are exceeded

1. Replace the respective front exhaust pipe with catalytic converter: Left front exhaust pipe. See «LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd__left-front-exhaust-pipe-with-catalytic) . Right front exhaust pipe. See «RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd__right-front-exhaust-pipe-with-catalytic) .

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .

Let vehicle cool off with the ignition switched off until the following conditions are met

1. Intake air temperature 10 to 50 °C; "PID 15: Intake air temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
2. Coolant temperature approximately Intake Air Temperature (10 to 50° C); "PID 05: Cooling fluid temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle for at least 15 minutes.
3. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
4. Select the "Test-ID 03: Secondary Air Injection (AIR) system"
5. 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.

SECONDARY AIR INJECTION (AIR) SYSTEM SPECIFIED VALUES

1. End diagnosis and switch ignition off.

If the specified values are not reached

1. Check secondary air system for proper seal. See «CHECKING SECONDARY AIR SYSTEM FOR PROPER SEAL»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd__checking-secondary-air-system-for-proper) .
2. Check Secondary Air Injection (AIR) Pump Motor -V101-. See «CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR»(/audi/s6/c5-1999-2004/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. Coolant temperature 80 to 110 °C; "PID 05: Cooling fluid temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
3. Throttle valve angle 10.0 to 20.0 %; "PID 17: Throttle valve position (absolute)". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle for at least 15 minutes.
3. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
4. Select the "Test-ID 05: Tank ventilation system".
5. Check specified values at idle.

TANK VENTILATION SYSTEM SPECIFIED VALUES

1. End diagnosis and switch ignition off.

If the specified values are not reached

1. EVAP canister system, checking for proper seal. See «EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd__evap-canister-system-checking-for-proper) .
2. Check Leak detection pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 7: Check test results of components that are continuously; monitored

This diagnostic mode indicates all stored DTCs of components and systems which are continuously monitored.

Note. In "Mode 3: Check DTC memory", no DTC entry is indicated.

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle.

Note. If the engine does not start up, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.

1. In diagnostic function "33 - OBD", select "Mode 7: Check test results of components that are continuously monitored".

The number of stored malfunctions or "0 malfunctions detected" is displayed.

1. End diagnosis and switch ignition off.
2. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Note. The DTC tables are sorted by SAE code. In addition, "emission"-relevant malfunctions are indicated in the instrument cluster via the Malfunction Indicator Lamp (MIL) -K83-. E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster.

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 8: Tank leak test

This diagnostic mode checks the fuel system for leaks.

Note. The Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- and Leak detection pump (LDP) -V144- seal the tank system.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. Intake Air Temperature (IAT) maximum 60 °C; "PID 15: Intake air temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
3. Coolant temperature 80 to 110 °C; "PID 05: Cooling fluid temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
4. Throttle valve angle 10.0 to 20.0 %; "PID 17: Throttle valve position (absolute)". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

Test sequence

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle for at least 15 minutes.
3. In diagnostic function "33 - OBD", select "Mode 8: Tank leak test".
4. Select the "Test-ID 01: Tank leak test".
5. Check specified value of tank leak test at idle.

TANK LEAK TEST SPECIFIED VALUE

Note. If the accelerator pedal is depressed during the test, the test will be aborted. To repeat the tank leak test, switch ignition off and start engine again and let run at idle for at least 15 minutes.

If specified value is obtained

1. End diagnosis and switch ignition off.

If specified value is not obtained

1. EVAP canister system, checking for proper seal. See «EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd__evap-canister-system-checking-for-proper) .
2. Check Leak detection pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/s6/c5-1999-2004/remont/fuel-system/#fuel-supply-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

After repair work, the following work steps must be performed in the mentioned sequence

1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. End diagnosis and switch ignition off.

Mode 9: Vehicle information

As of software version H4, vehicle specific diagnostic data such as e.g. the control module versions will be displayed in this diagnostic mode.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Switch ignition on.
3. In diagnostic function "33 - OBD", select "Mode 9: vehicle information".
4. Via the following table, select the desired vehicle information according to Test-ID (Test Identification).

Display vehicle information

TEST-ID DIAGNOSTIC TEXT (MODE 9)

1. End diagnosis and switch ignition off.

The readiness code is an 8 digit number block that indicates the status of emission relevant diagnostics.

When the diagnostic for a system (e.g.: secondary air system) has run through successfully, the respective digit of the number block is set from 1 to 0.

Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an exhaust relevant system, the readiness code should be generated via a road test to ensure that these systems are working according to specifications. If a malfunction is recognized during the diagnostic, it is stored in DTC memory.

The readiness code is erased every time DTC memory is erased or when voltage supply is interrupted. DTC memory should therefore only be erased when there are DTCs stored.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C; "PID 05: Cooling fluid temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle.
3. In diagnostic function "33 - OBD", select "Mode 1: Checking measured values."
4. Select the desired measuring value "PID 01".
5. Observe the right 8-digit number block

If all diagnoses have run through successfully, the following specified value 8-digit number block must appear

1. Specified value: 0 0 0 0 0 0 0 0

Scheme 130

If a 1 is displayed instead of a 0 in the 8-digit number block

1. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

1. Fuses for engine electronics OK

1. Ground (GND) connections at engine and transmission OK
2. Battery voltage at least 12.7 V
3. Exhaust system free of leaks.
4. Vehicles with automatic transmission: Selector lever in position "P" or "N".
5. Electrical consumers switched off (radiator fan must NOT run during test).
6. A/C switched off.
7. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-3-check-dtc-memory) .
8. Throttle valve angle 10.0 to 20.0 %; "PID 17: Throttle valve position (absolute)". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

Let vehicle cool off with the ignition switched off until the following conditions are met

1. Intake air temperature 10 to 50 °C; "PID 15: Intake air temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
2. Coolant temperature approximately Intake Air Temperature (10 to 50° C); "PID 05: Cooling fluid temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .
2. Start engine and let run at idle for at least 15 minutes.
3. Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface. The following operating conditions must be met during this road test: Engine speed 1800 to 2200 RPM; "PID 12: Engine rotations per minute". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) . Vehicle speed constant 90 km/h; "PID 13: Vehicle speed". See «MODE 1: CHECK MEASURED VALUES»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd__mode-1-check-measured-values) .
4. Read readiness code. See «READ READINESS CODE»(/audi/s6/c5-1999-2004/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-42l-v8-5v-art-awn-bbd) .

Fuel and air mixture and additional emission regulations

DIAGNOSTIC TROUBLE CODE P0102-P0160

Ignition system

DIAGNOSTIC TROUBLE CODE P0300-P0308

DIAGNOSTIC TROUBLE CODE P0321-P0445

Speed and idle control

DIAGNOSTIC TROUBLE CODE P0501-P0507

Control module and output signals

DIAGNOSTIC TROUBLE CODE P0601-P0605

Fuel and air ratios

DIAGNOSTIC TROUBLE CODE P1102-P1127

Note. mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load.

DIAGNOSTIC TROUBLE CODE P1128

Note. mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load.

DIAGNOSTIC TROUBLE CODE P1129

Note. mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load.

DIAGNOSTIC TROUBLE CODE P1130-P1131

Note. mult. = multiplicative, means that malfunction is valid across entire range of engine speed and engine load.

DIAGNOSTIC TROUBLE CODE P1136

Note. add = additive, means that malfunction is only valid at closed throttle (idle).

DIAGNOSTIC TROUBLE CODE P1137

Note. add = additive, means that malfunction is only valid at closed throttle (idle).

DIAGNOSTIC TROUBLE CODE P1138

Note. add = additive, means that malfunction is only valid at closed throttle (idle).

DIAGNOSTIC TROUBLE CODE P1139-P1140

Note. add = additive, means that malfunction is only valid at closed throttle (idle).

DIAGNOSTIC TROUBLE CODE P1141-P1199

DIAGNOSTIC TROUBLE CODE P1201-P1208

DIAGNOSTIC TROUBLE CODE P1213-P1220

DIAGNOSTIC TROUBLE CODE P1225-P1232

DIAGNOSTIC TROUBLE CODE P1237-P1244

Additional exhaust regulation

DIAGNOSTIC TROUBLE CODE P1296

DIAGNOSTIC TROUBLE CODE P1325-P1332

DIAGNOSTIC TROUBLE CODE P1335-P1347

DIAGNOSTIC TROUBLE CODE P1386-P1388

DIAGNOSTIC TROUBLE CODE P1391-P1568

DIAGNOSTIC TROUBLE CODE P1603-P1626

DIAGNOSTIC TROUBLE CODE P1630-P1639

DIAGNOSTIC TROUBLE CODE P1640-P1693

See also:
• TERMINAL RESISTANCE FOR CAN-BUS, CHECKING
• OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING
• OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER, CHECKING
• OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER, CHECKING
• FUEL PUMP (FP), ELECTRICAL TESTING
• EXHAUST SYSTEM, CHECKING FOR PROPER SEAL
• CHECKING SECONDARY AIR SYSTEM FOR PROPER SEAL
• SAFETY PRECAUTIONS
• LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING
• RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING
• EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL
• INTAKE AIR TEMPERATURE (IAT) SENSOR -G42-, CHECKING
• ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING
• ENGINE COOLING - 4.2L V8 5V - ART, AWN, BBD
• IGNITION COILS WITH POWER OUTPUT STAGES, CHECKING
• CHECK CAMSHAFT POSITION (CMP) SENSOR
• THROTTLE VALVE CONTROL MODULE -J338-, CHECKING
• MODE 3: CHECK DTC MEMORY
• DIAGNOSTIC TROUBLE CODE (DTC) TABLES
• MALFUNCTION LAMP FOR ON BOARD DIAGNOSTIC (OBD)/MALFUNCTION INDICATOR LAMP (MIL) -K83- IN INSTRUMENT CLUSTER
• ELECTRONIC POWER CONTROL (EPC) WARNING LAMP -K132- IN INSTRUMENT CLUSTER
• MODE 4: RESET/ERASE DIAGNOSTIC DATA
• MODE 9: VEHICLE INFORMATION
• SAFETY PRECAUTIONS
• SELECT DIAGNOSTIC FUNCTION
• MODE 1: CHECK MEASURED VALUES
• MODE 2: CHECKING OPERATING CONDITIONS
• MODE 5: CHECK OXYGEN SENSOR OUTPUT SIGNALS
• MODE 6: CHECK TEST RESULTS OF COMPONENTS THAT ARE NOT CONTINUOUSLY MONITORED
• MODE 7: CHECK TEST RESULTS OF COMPONENTS THAT ARE CONTINUOUSLY; MONITORED
• MODE 8: TANK LEAK TEST
• Evaluation test-ID 01: Rich to lean sensor barrier voltage
• Evaluation test-ID 02: Lean to rich sensor barrier voltage
• Evaluation test-ID 07: Minimum voltage at sensor for test cycle
• Evaluation test-ID 08: Maximum voltage at sensor for test cycle
• Evaluation test-ID 09: Time period between sensor shift procedures (half value)
• EVALUATION TEST-ID 48: "RICH"-shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter
• EVALUATION TEST-ID 49: "LEAN" -shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter
• Evaluation test-ID 50: Time period between sensor shift procedures
• MALFUNCTION INDICATOR LAMP (MIL) FUNCTION TEST