Engine Controls - on Board Diagnostic (OBD), Generic Scan Tool - 3.0l Avk Audi A4 B6

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 .

Electronic Power Control (EPC) -relevant malfunctions are also indicated by the EPC Warning Lamp -K132- 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 "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

Identification of Engine Control Module (ECM)

The control module version is displayed when "Mode 9: Vehicle information" is selected. See MODE 9: VEHICLE INFORMATION .

Engine Control Module (ECM) equipment

ENGINE CONTROL MODULE (ECM) EQUIPMENT

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 power!

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 the Electronic Power Control (EPC) system

Note. The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-Bus. Check terminal resistance for CAN-Bus. See 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.

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

If malfunctions are recognized in the EPC 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 EPC

Note. The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-Bus. Check terminal resistance for CAN-Bus. See TERMINAL RESISTANCE FOR CAN-BUS, CHECKING .

Safety precautions

If special testing 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 System Wiring Diagrams 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.

Scheme 170

1. Switch ignition off.
2. Connect Vehicle Diagnostic and Information System VAS 5052 with diagnostic wire VAS 5052/3. CAUTION: Observe safety precautions. See «SAFETY PRECAUTIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__safety-precautions) . NOTE: If a malfunction indication is displayed

Depending on the desired mode "Selectable diagnostic modes" table. See SELECT DIAGNOSTIC FUNCTION

1. Switch ignition on. or
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 CHART Selectable diagnostic modes See Requirements Ignition on, engine standing Engine running at idle Vehicle in drive mode Mode 1: Check measuring values See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) . Yes Yes Yes Mode 2: Checking operating conditions See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-2-checking-operating-conditions) . Yes Yes Yes Mode 3: Check DTC Memory See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) . Yes (1) Yes Yes Mode 4: Reset/erase diagnostic data See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) . Yes Yes Yes Mode 5: Check output of oxygen sensor signals See «MODE 5: CHECK OXYGEN SENSOR OUTPUT SIGNALS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-5-check-oxygen-sensor-output) . Yes Yes Yes Mode 6: Check test results of components that are not continuously monitored See «MODE 6: CHECK TEST RESULTS OF COMPONENTS THAT ARE NOT CONTINUOUSLY MONITORED»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-6-check-test-results-of) . No Yes Yes Mode 7: Check test results of components that are continuously monitored See «MODE 7: CHECK TEST RESULTS OF COMPONENTS THAT ARE CONTINUOUSLY MONITORED»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-7-check-test-results-of) . Yes (1) Yes Yes Mode 8: Tank leak test See «MODE 8: TANK LEAK TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-8-tank-leak-test) . No Yes Yes Mode 9: Vehicle information See «MODE 9: VEHICLE INFORMATION»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-9-vehicle-information) . Yes Yes Yes (1) 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.

Recommended special tools and equipment

1. VAG1598/31 test box

Procedure

1. Switch ignition off.
2. Remove rubber seal for plenum chamber cover.
3. Remove plenum chamber cover -1- toward front (arrows).
4. Pry off both covers -3- using a screwdriver.
5. Loosen hex-nuts -4- by several turns.
6. Loosen wiper arm -2- from wiper axle by lightly tilting.
7. Remove hex nuts completely and remove wiper arms.
8. Disconnect securing clips -1- and remove cowl grill -5-.
9. Remove cover for E-box, plenum chamber (arrows).
10. Using a screwdriver, pry off retaining bracket (arrow).
11. Disengage connector catches (arrows) and disconnect harness connectors -1- and -2- from Engine Control Module (ECM). NOTE: Adaptation values are erased when connector is disconnected from the Engine Control Module (ECM), DTC memory content remains intact.
12. Connect e.g. VAG1598/31 test box to connectors of wiring harness. Connect Ground (GND) clip at test box (not visible in illustration) to Ground (GND). 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 "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

Mode 1: Check measuring values

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

Test requirement

1. Coolant temperature at least 80 °C. See "PID 05: Coolant temperature".

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 - Coolant temperature", via the «DISPLAY MEASURING VALUES PID 01-56 (MODE 1)»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) 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 PID 01-56 (MODE 1) PID (1) Display measuring values 01: Monitoring status since erasing DTC memory 03: Condition of the fuel system 04: Calculated load condition value 05: Coolant temperature 06: Short time gasoline-air ratio bank 1 07: Gasoline-air ratio bank 1 08: Short time gasoline-air ratio bank 2 09: Gasoline-air ratio bank 2 12: Engine rotations per minute (RPM) 13: Vehicle speed 14: Valve timing adjustment at 1. cyl. to "advance" 15: Intake Air Temperature (IAT) 16: Air flow quantity at Mass Air Flow (MAF) sensor 17: Throttle valve position (absolute) 18: Availability status of secondary air 19: Available oxygen B1 to B2-S1 to S4 (present or not present) 21: Sensor voltage Bank 1 - sensor 2 25: Sensor voltage Bank 2 - sensor 2 28: OBD-requirement for which this vehicle is designed - OBD and OBD II 52: Current output of oxygen sensor signal value Bank 1 - sensor 1 56: Current output of oxygen sensor signal value Bank 2 - sensor 1 (1) PIDs that are not relevant are not listed.
4. 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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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: Coolant 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 PID 02-13 (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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P3xxx-DTCs. See «SAE P3XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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

Identifying SAE Diagnostic Trouble Codes

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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-. EPC relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- 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 .

INDICATION EXAMPLE CHART (MODE 3)

1. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P3xxx-DTCs. See «SAE P3XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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 page "Mode 2: Check operating conditions". See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-2-checking-operating-conditions) .
3. All adaptation values will be reset.
4. All test results of the diagnostic functions will be reset.

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__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 "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 the Vehicle Diagnostic, Testing and Information System VAS 5051 or the Vehicle Diagnostic and Information System VAS 5052 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. DIAGNOSTIC TEST-ID 01-132 CHART (MODE 5) Test-ID (1) Diagnostic text Evaluation 01: Rich to lean sensor barrier voltage See «EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-01-rich-to-lean) . 02: Lean to rich sensor barrier voltage See «Evaluation test-ID 02: Lean to rich sensor barrier voltage»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-02-lean-to-rich) . 07: Minimum voltage at sensor for test cycle See «EVALUATION TEST-ID 07: MINIMUM VOLTAGE AT SENSOR FOR TEST CYCLE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-07-minimum-voltage-at) . 08: Maximum voltage at sensor for test cycle See «EVALUATION TEST-ID 08: MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-08-maximum-voltage-at) . 129: Current value of oxygen sensor signal See «EVALUATION TEST-ID 129: CURRENT VALUE OF OXYGEN SENSOR SIGNAL»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-129-current-value-of) . 130: Specified value of oxygen sensor signal See «EVALUATION TEST-ID 130: SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-130-specified-value-of) . 131: Dynamic value See «EVALUATION TEST-ID 130: SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-130-specified-value-of) . 132: Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter See «EVALUATION TEST-ID 132: SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VIA OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__evaluation-test-id-132-shift-of-oxygen) . (1) Test IDs that are not relevant are not listed.
6. End diagnosis and switch ignition off.

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

RICH TO LEAN SENSOR BARRIER VOLTAGE SPECIFICATIONS

If specified value is not obtained

1. Replace respective oxygen sensor behind catalytic converter. See «OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .

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

LEAN TO RICH SENSOR BARRIER VOLTAGE SPECIFICATIONS

If specified value is not obtained

1. Replace respective oxygen sensor behind catalytic converter. See «OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .

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

MINIMUM VOLTAGE AT SENSOR FOR TEST CYCLE SPECIFICATIONS

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 behind Three Way Catalytic Converter (TWC). See «CHECK OXYGEN SENSOR AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk__check-oxygen-sensor-and-oxygen-sensor) .

If the specified value is exceeded

1. Oxygen sensor not ready for operation
2. Oxygen sensor heating faulty Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
3. 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). See «CHECK OXYGEN SENSOR AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk__check-oxygen-sensor-and-oxygen-sensor) .

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

MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE SPECIFICATIONS

If the specification is exceeded or not met

1. Oxygen sensor not ready for operation
2. Oxygen sensor heating faulty Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
3. Short circuit to Ground (GND) or 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). See «CHECK OXYGEN SENSOR AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk__check-oxygen-sensor-and-oxygen-sensor) .

Evaluation test-ID 129: Current value of oxygen sensor signal

CURRENT VALUE OF OXYGEN SENSOR SIGNAL SPECIFICATIONS

If the specification is exceeded or not met

1. Oxygen sensor not ready for operation
2. Oxygen sensor heating faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
3. Short circuit to Ground (GND) or B+ or open circuit in wiring in oxygen sensor or in wire.
4. Oxygen sensor faulty Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «CHECK OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .

Evaluation test-ID 130: Specified value of oxygen sensor signal

SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL

If the specification is exceeded or not met

1. Replace Engine Control Module (ECM).

Evaluation test-ID 131: Dynamic value

DYNAMIC VALUE SPECIFICATIONS

If the specified value is not reached

1. Oxygen sensor is aged Replace respective oxygen sensor before catalytic converter. See «OXYGEN SENSORS BEFORE CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .

Evaluation test-ID 132: Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter

SHIFT OF OXYGEN SENSOR REGULATION SPECIFICATIONS

If the specified value is not reached

1. Oxygen sensor not ready for operation
2. Oxygen sensor heating faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
3. Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire.
4. Oxygen sensor faulty Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «CHECK OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
5. Mixture too rich Check fuel pressure regulator and residual pressure. See «FUEL PRESSURE REGULATOR AND RESIDUAL PRESSURE, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) . Check fuel injectors. See «CHECK FUEL INJECTORS»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) . Check Evaporative Emission (EVAP) canister purge regulator valve -N80-. See «CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk) .

If the specified value is exceeded

1. Oxygen sensor not ready for operation
2. Oxygen sensor heating faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEFORE THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
3. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire.
4. Oxygen sensor faulty Check Oxygen Sensors (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «CHECK OXYGEN SENSORS AND OXYGEN SENSOR CONTROL BEFORE CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
5. Mixture too lean Check fuel pressure regulator and residual pressure. See «FUEL PRESSURE REGULATOR AND RESIDUAL PRESSURE, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) . Check fuel injectors. See «CHECK FUEL INJECTORS»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) . Check intake system for leaks (false air). See «CHECKING INTAKE SYSTEM FOR LEAKS (UNMETERED AIR)»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) . Check Fuel Pump (FP). See «FUEL PUMP (FP), ELECTRICAL TESTING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk) for front wheel drive. See «FUEL PUMP (FP), ELECTRICAL TESTING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk) for all wheel drive. Check exhaust system for proper seal. See «CHECK EXHAUST SYSTEM FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__check-exhaust-system-for-proper-seal) . Check Secondary Air Injection (AIR) system for proper seal. See «CHECKING SECONDARY AIR SYSTEM FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__checking-secondary-air-system-for-proper) . Check vacuum lines for proper seal.

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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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.

COMPONENTS CHART (TEST-ID 01, 03, 05, 09)

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 "Mode 1: Check measuring values"; "PID 12: Engine rotations per minute". See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
2. Vehicle speed constant 90 km/h. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-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" off.
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 CONVERSION (TEST-ID 01) Catalytic conversion Specified value min. max. Bank 1 0.2031 0.8516 Bank 2 0.2031 0.8516
5. 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 - vehicles with manual transmission. See «LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH MANUAL TRANSMISSION)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Right front exhaust pipe - vehicles with manual transmission. See «RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH MANUAL TRANSMISSION)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Left front exhaust pipe - vehicles with automatic transmission 01J. See «LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH AUTOMATIC TRANSMISSION 01J)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Right front exhaust pipe - vehicles with automatic transmission 01J. See «RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH AUTOMATIC TRANSMISSION 01J)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Left front exhaust pipe - vehicles with automatic transmission 01V. See «LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH AUTOMATIC TRANSMISSION 01V)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Right front exhaust pipe - vehicles with automatic transmission 01V. See «RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, REMOVING AND INSTALLING (VEHICLES WITH AUTOMATIC TRANSMISSION 01V)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__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. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
2. Coolant temperature approximately Intake Air Temperature (10 to 50 °C). See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 CHART Secondary Air Injection (AIR) system Specified value Very low secondary air mass Bank 1 min: 0.5 Bank 2 min: 0.5
6. 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/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__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/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__check-voltage-supply-of-the-secondary) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. Coolant temperature 80 to 110 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
3. Throttle valve angle 12.0 to 16.0 %. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 VALUES Tank ventilation system Specified value Deviation of oxygen sensor control in direction "lean" min: 0.05 Deviation of oxygen sensor control in direction "rich" min: 0.05
6. 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/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk__evap-canister-system-checking-for-proper) .
2. Check Leak detection pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
2. Perform a road test until a coolant temperature of 80 to 100 °C is reached. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
3. Switch ignition off.
4. Start engine at a coolant temperature of 80 to 90 °C and let it run at idle.
5. Perform a 5 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. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
2. Vehicle speed constant 90 km/h. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-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 09: Engine Coolant Temperature (ECT) sensor/coolant regulator".
4. Check specified values at idle. ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-/COOLANT REGULATOR SPECIFICATIONS Engine Coolant Temperature (ECT) Sensor -G62-/coolant regulator Specified value min. max. Coolant temperature 70 °C 115 °C
5. End diagnosis and switch ignition off.

If specified value is not obtained

1. Check Engine Coolant Temperature (ECT) Sensor -G62-. See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
2. Check coolant regulator (thermostat): See «COOLANT THERMOSTAT, REMOVING, INSTALLING AND CHECKING»(/audi/a4/b6-2000-2006/remont/cooling-fan/#engine-cooling-30l-6-cylinder-5v-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data" «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . SAE P3xxx-DTCs. See «SAE P3XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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-. Electronic Power Control (EPC) -relevant malfunctions are also indicated by the EPC Warning Lamp -K132- in the instrument cluster.

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . 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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. Intake Air Temperature (IAT) maximum 60 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
3. Coolant temperature 80 to 110 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
4. Throttle valve angle 12.0 to 16.0%. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

Test sequence

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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 CHART Tank leak test Specified value Test function active Test function is being initiated, please wait Test off Test function aborted Test OK 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/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk__evap-canister-system-checking-for-proper) .
2. Check Leak Detection Pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-30l-avk) .

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

1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-4-reseterase-diagnostic-data) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) . End diagnosis and switch ignition off.

Mode 9: Vehicle information

In this diagnostic mode, vehicle specific diagnostic data such as e.g. the control module versions will be displayed.

1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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

DISPLAY VEHICLE INFORMATION (TEST-ID 04 & 06)

1. End diagnosis and switch ignition off.

The readiness code is an 8 digit number block that indicates the results of an emission relevant On Board Diagnostic (OBD).

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.

On Board 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 check, 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/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
2. Coolant temperature at least 80 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
2. Start engine and let run at idle.
3. In diagnostic function "33 - OBD", select "Mode 1: Checking measuring 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 171

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

1. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .

1. Fuses for engine electronics OK See appropriate System Wiring Diagram article.
2. Ground (GND) connections at engine and transmission OK
3. Battery voltage at least 12.7 V
4. Exhaust system free of leaks.
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.
8. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-3-check-dtc-memory) .
9. Throttle valve angle 12.0 to 16.0%. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

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

1. Intake air temperature 10 to 50 °C. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
2. Coolant temperature approximately Intake Air Temperature (10 to 50 °C). See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .
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

1. Engine speed 1800 to 2200 RPM. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .
2. Vehicle speed constant 90 km/h. See «MODE 1: CHECK MEASURING VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk__mode-1-check-measuring-values) .

1. Read readiness code. See «READ READINESS CODE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .

Fuel and air mixture and additional emission regulations

DIAGNOSTIC TROUBLE CODE P0010-P0058

Fuel and air ratios

DIAGNOSTIC TROUBLE CODE P0101-P0175

DIAGNOSTIC TROUBLE CODE P0201-P0277

Ignition system

DIAGNOSTIC TROUBLE CODE P0300-P0393

Additional exhaust regulation

DIAGNOSTIC TROUBLE CODE P0413-P0492

Speed and idle control

DIAGNOSTIC TROUBLE CODE P0501-P0507

Control module and output signals

DIAGNOSTIC TROUBLE CODE P0601-P0688

Transmission

DIAGNOSTIC TROUBLE CODE P0704

DIAGNOSTIC TROUBLE CODE P1176-P1177

DIAGNOSTIC TROUBLE CODE P2096-P2099

DIAGNOSTIC TROUBLE CODE P2101-P2181

DIAGNOSTIC TROUBLE CODE P2400-P2404

DIAGNOSTIC TROUBLE CODE P3081

See also:
• TERMINAL RESISTANCE FOR CAN-BUS, CHECKING
• OXYGEN SENSORS BEHIND CATALYTIC CONVERTER, REMOVING AND INSTALLING
• CHECK OXYGEN SENSOR AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER
• OXYGEN SENSOR HEATER FOR OXYGEN SENSORS BEHIND THREE WAY CATALYTIC CONVERTER (TWC), CHECKING
• CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80
• CHECK EXHAUST SYSTEM FOR PROPER SEAL
• CHECKING SECONDARY AIR SYSTEM FOR PROPER SEAL
• SAFETY PRECAUTIONS
• CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR
• EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL
• COOLANT THERMOSTAT, REMOVING, INSTALLING AND CHECKING
• THROTTLE VALVE CONTROL MODULE -J338-, CHECKING
• IGNITION COILS WITH POWER OUTPUT STAGES, CHECKING
• CHECK CAMSHAFT POSITION (CMP) SENSOR
• 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 MEASURING 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 129: CURRENT VALUE OF OXYGEN SENSOR SIGNAL
• EVALUATION TEST-ID 130: SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL
• EVALUATION TEST-ID 132: SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VIA OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER