Home ReviewsRefund
Home/Audi/A4/Audi A4 B6 (2000-2006)/Repair manual/Exhaust/Exhaust System, Emission Controls, Generic Scan Tool (3.0l …
Contents Wiring diagrams Section: Exhaust All sections

Exhaust System, Emission Controls, Generic Scan Tool (3.0l Avk) Audi A4 B6

Exhaust 14 illustrations ~9596 words

Exhaust system components, removing and installing

Note. Always replace gaskets and self-locking nuts. After exhaust system repairs, make sure exhaust system is not under stress and is far enough from the body. If necessary, loosen clamps and align mufflers and exhaust pipes so that there is adequate distance to vehicle body, and weight is evenly distributed among the exhaust hangers. Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.

Exhaust system for vehicles with Front Wheel Drive (FWD) - Component overview

Note. The following list refers to (Scheme 41).

  1. Center muffler Factory-installed with rear muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  2. 23 N.m
  3. Suspended mount Replace if damaged
  4. 27 N.m Always replace
  5. Exhaust manifold for cylinder bank 1 (right)
  6. Gasket Always replace
  7. Heated Oxygen Sensor (HO2S) -G39- (before catalytic converter) Bank 1, sensor 1 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  8. Heated Oxygen Sensor (HO2S) 2 -G108- (before catalytic converter) Bank 2, sensor 1 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  9. Exhaust manifold for cylinder bank 2 (left)
  10. Gasket Always replace
  11. 27 N.m Always replace
  12. Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- Bank 2, sensor 2 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) . Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  13. Front exhaust pipe with catalytic converter for cylinder bank 2 (left) with decoupling element Decoupling element must not be kinked more than 10°, otherwise it may be damaged Protect from hit and impact stress Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Individual mounting components for vehicles with manual transmission. See «Individual left mounting components for vehicles with manual transmission»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) . Individual mounting components for vehicles with automatic transmission 01J. See «Individual left mounting components for vehicles with automatic transmission 01J»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) . Vehicles with manual transmission, removing and installing. 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) . Vehicles with automatic transmission 01J, removing and installing. 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) .
  14. Front clamping sleeve Before tightening ensure exhaust system is tension-free. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Installation position. See «INSTALLED POSITION OF FRONT CLAMPING SLEEVES»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__installed-position-of-front-clamping-sleeves) . Tighten bolts evenly
  15. 40 N.m
  16. Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- with Oxygen Sensor (O2S) Heater 1 -Z29- Bank 1, sensor 2 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  17. Front exhaust pipe with catalytic converter for cylinder bank 1 (right) with decoupling element Decoupling element must not be kinked more than 10°, otherwise it may be damaged Protect from hit- and impact stress Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Individual mounting components for vehicles with manual transmission. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) . Individual mounting components for vehicles with automatic transmission 01J. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01J»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) . Vehicles with manual transmission, removing and installing. 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) . Vehicles with automatic transmission 01J, removing and installing. 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) .
  18. Rear muffler for left side of vehicle Factory-installed with center muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  19. Suspended mount Replace if damaged
  20. 23 N.m
  21. Rear muffler for right side of vehicle Factory-installed with center muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  22. 23 N.m
  23. Rear clamping sleeve Used when center or rear muffler is replaced separately. Before tightening ensure exhaust system is tension-free. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Installed position. See «INSTALLED POSITION OF REAR CLAMPING SLEEVES»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__installed-position-of-rear-clamping-sleeves) . Tighten bolts evenly
  24. 40 N.m
  25. Suspended mount Replace if damaged
  26. 23 N.m

Exhaust system for vehicles with All Wheel Drive (AWD) - Component overview

Note. The following list refers to (Scheme 42).

  1. 23 N.m
  2. Suspended mount Replace if damaged
  3. Center muffler Factory-installed with rear muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  4. 27 N.m Always replace
  5. Exhaust manifold for cylinder bank 1 (right)
  6. Gasket Always replace
  7. Heated Oxygen Sensor (HO2S) -G39- (before catalytic converter) Bank 1, sensor 1 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  8. Heated Oxygen Sensor (HO2S) 2 -G108- (before catalytic converter) Bank 2, sensor 1 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  9. Exhaust manifold Cylinder bank 2 (left)
  10. Gasket Always replace
  11. 27 N.m Always replace
  12. Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- Bank 2, sensor 2 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) . Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  13. Front exhaust pipe with catalytic converter for cylinder bank 2 (left) with decoupling element Decoupling element must not be kinked more than 10°, otherwise it may be damaged Protect from hit- and impact stress Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Individual mounting components for vehicles with manual transmission. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) . Individual mounting components for vehicles with automatic transmission 01V. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01V»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) . Vehicles with manual transmission, removing and installing. 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) . Vehicles with automatic transmission 01V, removing and installing. 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) .
  14. Front clamping sleeve Before tightening ensure exhaust system is tension-free. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Installation position. See «INSTALLED POSITION OF FRONT CLAMPING SLEEVES»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__installed-position-of-front-clamping-sleeves) . Tighten bolts evenly
  15. 40 N.m
  16. Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- with Oxygen Sensor (O2S) Heater 1 -Z29- Bank 1, sensor 2 Removing and installing. 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) . The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Tighten to 55 N.m
  17. Front exhaust pipe with catalytic converter for cylinder bank 1 (right) with decoupling element Decoupling element must not be kinked more than 10°, otherwise it may be damaged Protect from hit- and impact stress Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Individual mounting components for vehicles with manual transmission. See «INDIVIDUAL LEFT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) . Individual mounting components for vehicles with automatic transmission 01V. See «INDIVIDUAL LEFT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01V»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) . Vehicles with manual transmission, removing and installing. 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) . Vehicles with automatic transmission 01V, removing and installing. 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) .
  18. Rear muffler for left side of vehicle Factory-installed with center muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  19. Suspended mount Replace if damaged
  20. 23 N.m
  21. Rear muffler for right side of vehicle Factory-installed with center muffler as one unit. If repair is necessary, replace separately Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .
  22. 23 N.m
  23. 40 N.m
  24. Rear clamping sleeve Used when center or rear muffler is replaced separately. Before tightening ensure exhaust system is tension-free. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . Installed position. See «INSTALLED POSITION OF REAR CLAMPING SLEEVES»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__installed-position-of-rear-clamping-sleeves) . Tighten bolts evenly

Installed position of front clamping sleeves

  1. Install double clamps so that the bolt ends do not project over lower edge of double clamp. Threaded connections face each other

Installed position of rear clamping sleeves

  1. Install double clamps so that the bolt ends do not project over lower edge of double clamp. Threaded connections point outward

Individual left mounting components for vehicles with manual transmission

  1. Self-locking nut (25 N.m)
  2. Spacer sleeve
  3. Strap
  4. Buffer
  5. Spacer sleeve
  6. Bolt (25 N.m)
  7. Washer
  8. Compression spring
  9. Spacer sleeve

Individual right mounting components for vehicles with manual transmission

  1. Spacer sleeve
  2. Strap
  3. Compression spring
  4. Washer
  5. Bolt (25 N.m)
  6. Spacer sleeve
  7. Buffer
  8. Spacer sleeve
  9. Self-locking nut (25 N.m)

Individual left mounting components for vehicles with automatic transmission 01V

  1. Bolt (25 N.m)
  2. Heat shield for selector lever cable
  3. Spacer sleeve
  4. Buffer
  5. Strap
  6. Spacer sleeve
  7. Bracket
  8. Self-locking nut (25 N.m)
  9. Compression spring
  10. Spacer sleeve
  11. Washer

Individual right mounting components for vehicles with automatic transmission 01V

  1. Washer
  2. Bolt (25 N.m)
  3. Spacer sleeve
  4. Buffer
  5. Strap
  6. Spacer sleeve
  7. Self-locking nut (25 N.m)
  8. Compression spring
  9. Spacer sleeve

Individual left mounting components for vehicles with automatic transmission 01J

  1. Bolt (25 N.m)
  2. Washer
  3. Compression spring
  4. Spacer sleeve
  5. Self-locking nut (25 N.m)
  6. Bolt (25 N.m)
  7. Spacer sleeve
  8. Buffer
  9. Strap
  10. Spacer sleeve

Individual right mounting components for vehicles with automatic transmission 01J

  1. Self-locking nut (25 N.m)
  2. Bolt (25 N.m)
  3. Spacer sleeve
  4. Buffer
  5. Strap
  6. Spacer sleeve
  7. Bolt (25 N.m)
  8. Washer
  9. Compression spring
  10. Spacer sleeve

Three Way Catalytic Converter (TWC), checking

  1. Perform the test in "Mode 6: Check test results of components that are not continuously monitored", as described under "Test-ID 01: Check catalytic converter". See «TEST-ID 01: CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) .

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) .

Recommended special tools and equipment

  1. 3337 wrench, 7-piece set

Scheme 41

Scheme 41: Removing
Scheme 41: Removing
  1. Disconnect electrical 6-pin harness connector -1- from Heated Oxygen Sensor (HO2S) -G39- (before catalytic converter) and Oxygen Sensor (O2S) Heater -Z19- (bank 1, sensor 1).
  2. Disconnect electrical 6-pin harness connector -4- from Heated Oxygen Sensor (HO2S) 2 -G108- (before catalytic converter) and Oxygen Sensor (O2S) Heater 2 -Z28- (bank 2, sensor 1). NOTE: To reach the harness connectors, the left cover in engine compartment must be removed, the line to Engine Coolant Level (ECL) Warning Switch at bottom on reservoir must be disconnected, and the bolt -arrow- of the coolant reservoir must be unscrewed and set aside. Coolant hoses -1- to -3- remain connected.
  3. Remove corresponding front exhaust pipe: 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) .
  4. Unscrew oxygen sensor e.g. using special tool 3337.

Installing

Installation is the reverse of removal, noting the following

Note. The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body. When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Wires of oxygen sensors must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

Tightening torque

ComponentN.m
Oxygen sensor to catalytic converter55

TIGHTENING TORQUE SPECIFICATION: HO2S BEFORE CATALYTIC CONVERTER

  1. 3337 wrench, 7-piece set

Removing left oxygen sensor behind catalytic converter

  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (left side).
  3. Remove coolant reservoir (arrow)
  4. Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom of reservoir.
  5. Tie up coolant reservoir with connected coolant hoses -1- to -3- to the side.

Vehicles with automatic transmission

  1. Disconnect vacuum hose to brake booster (arrows).

All

  1. Remove heat shield for harness connectors at left of bulkhead, if installed.
  2. Remove harness connectors -1- to -4- from bracket at left of bulkhead.
  3. Disconnect electrical harness connector -1-.
  4. Move wire to oxygen sensor clear.
  5. Unscrew oxygen sensor behind catalytic converter (arrow) e.g. using special tool 3337/7. NOTE: Illustration is shown with engine removed.

Removing right oxygen sensor behind catalytic converter

  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts (arrows). see scheme 24
  4. Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
  5. Remove air guide -2-.
  6. Remove air filter housing (arrows).
  7. Remove bolts for holding plate -3- for solenoid valves (arrows).
  8. Disconnect electrical harness connector at Mass Air Flow (MAF) sensor.
  9. Remove hose -4- of crankshaft housing ventilation from air duct -2-.
  10. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  11. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  12. Remove harness connectors -1- to -4- from bracket at right of bulkhead.
  13. Disconnect electrical harness connector -3-.
  14. Move wire to oxygen sensor clear.
  15. Unscrew oxygen sensor behind catalytic converter (arrow) using special tool 3337/7. NOTE: Illustration is shown with engine removed.

Installation is the reverse of removal, noting the following

Note. The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body. When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body. Wires of oxygen sensors must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

ComponentN.m
Oxygen sensor to catalytic converter55

TIGHTENING TORQUE SPECIFICATION: HO2S BEHIND CATALYTIC CONVERTER

Scheme 42

Scheme 42: Removing
Scheme 42: Removing
  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (left side).
  3. Remove coolant reservoir (arrow)
  4. Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom of reservoir.
  5. Tie up coolant reservoir with connected coolant hoses -1- to -3- to the side.
  6. Remove heat shield for harness connectors at left of bulkhead, if installed.
  7. Remove harness connectors -1- to -4- from bracket at left of bulkhead.
  8. Disconnect electrical harness connectors -1- and -4-.
  9. Guide wires to the oxygen sensors downward.
  10. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  11. Remove left front wheel.
  12. For vehicles with auxiliary heater, remove bolts (arrows) for exhaust pipe of parking heater/auxiliary heater on noise insulation.
  13. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  14. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  15. Remove front vehicle floor crossmember -1- to -4-. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  16. Disconnect exhaust system at left double clamp (left arrow).
  17. Remove heat shield -1- for left drive axle.
  18. Remove bracket for front exhaust pipe (arrow).
  19. Expose oxygen sensor wires.
  20. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  21. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Replace gaskets and self-locking nuts. Wires of oxygen sensors must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

  1. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with manual transmission. See «INDIVIDUAL LEFT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) .

Tightening torques

ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Drive axle protection to transmission23

TIGHTENING TORQUE SPECIFICATION: LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, MAN. TRANS.

Removing

  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts (arrows). see scheme 44
  4. Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
  5. Remove air guide -2-.
  6. Remove air filter housing (arrows).
  7. Remove bolts for holding plate -3- for solenoid valves (arrows).
  8. Disconnect electrical harness connector at Mass Air Flow (MAF) sensor.
  9. Remove hose -4- from air duct -2-.
  10. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  11. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  12. Remove harness connectors -1- to -4- from bracket at right of bulkhead.
  13. Disconnect electrical harness connectors -1- and -4-.
  14. Guide wires to the oxygen sensors downward.
  15. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  16. Remove right front wheel
  17. For vehicles with auxiliary heater, remove bolts (arrows) for exhaust pipe of parking heater/auxiliary heater on noise insulation.
  18. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  19. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  20. Remove front vehicle floor crossmember -1- to -4-. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  21. Disconnect exhaust system at right double clamp (right arrow).
  22. Remove heat shield -1- for right drive axle.
  23. Remove bracket for front exhaust pipe (arrow).
  24. Expose oxygen sensor wires.
  25. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  26. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Replace gaskets and self-locking nuts. Wires of oxygen sensors must always be secured in the same position when installing so that contact with the exhaust pipe is avoided.

  1. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with manual transmission. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) .
ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Drive axle protection to transmission23

TIGHTENING TORQUE SPECIFICATION: RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, MAN. TRANS.

  1. 3337 wrench, 7-piece set
  2. VAG1383A engine/transmission hoist
  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts for holding plate -3- for solenoid valves (arrows). see scheme 61
  4. Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
  5. Remove hose -4- from air duct -2-.
  6. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  7. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  8. Remove cover -1- in engine compartment (left side).
  9. Remove coolant reservoir (arrow)
  10. Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom of reservoir.
  11. Tie up coolant reservoir with connected coolant hoses -1- to -3- to the side.
  12. Disconnect vacuum hose to brake booster (arrows).
  13. Remove heat shield for harness connectors at left of bulkhead, if installed.
  14. Remove harness connectors -1- to -4- from bracket at left of bulkhead.
  15. Disconnect electrical harness connectors -1- and -4-.
  16. Move wires to oxygen sensors clear.
  17. Unscrew oxygen sensor behind catalytic converter (arrow) e.g. using special tool 3337/7. NOTE: Illustration is shown with engine removed.
  18. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  19. Remove left front wheel.
  20. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  21. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  22. Remove front vehicle floor crossmember -1- to -4-. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  23. Disconnect exhaust system at both double clamps -arrows-.
  24. Remove VAG1359/2 universal mount from VAG1383A engine/transmission jack and place a piece of wood -1- onto punch instead.
  25. Support rear crossmember using VAG1383A engine/transmission jack.
  26. First remove bolts -1- and -2-, then bolts -3- and -4-.
  27. Release slowly the rear crossmember using VAG1383A engine/transmission jack.
  28. Set aside VAG1383A engine/transmission jack.
  29. Remove nuts (arrows) and rear crossmember.
  30. Remove heat shield -1- for left drive axle.
  31. Remove bracket for front exhaust pipe (arrows).
  32. Expose oxygen sensor wire.
  33. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  34. Loosen several turns the lower nuts -1- on left and right of engine mount.
  35. Press transmission to the right.
  36. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Replace gaskets and self-locking nuts.

  1. Install oxygen sensor. 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) .
  2. Install subframe: See «SUBFRAME & BUSHINGS»(/audi/a4/b6-2000-2006/remont/suspension-front/#suspension-front) .
  3. Install engine free of stress.
  4. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with automatic transmission 01J. See «INDIVIDUAL LEFT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01J»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) .
ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Mounting straps to transmission25
Drive axle protection to transmission23
Engine mount to console23

TIGHTENING TORQUE SPECIFICATION: LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, WITH 01J AUTO. TRANS.

  1. 3337 wrench, 7-piece set
  2. VAG1383A engine/transmission hoist

Scheme 43

Scheme 43: Removing
Scheme 43: Removing
  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts (arrows). see scheme 83
  4. Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
  5. Remove air guide -2-.
  6. Remove air filter housing (arrows).
  7. Remove bolts for holding plate -3- for solenoid valves (arrows).
  8. Disconnect electrical harness connector at Mass Air Flow (MAF) sensor.
  9. Remove hose -4- from air duct -2-.
  10. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module. see scheme 86
  11. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  12. Remove harness connectors -1- to -4- from bracket at right of bulkhead.
  13. Disconnect electrical harness connectors -1- and -4-.
  14. Move wires to oxygen sensors clear.
  15. Unscrew oxygen sensor behind catalytic converter (arrow) e.g. using special tool 3337/7. NOTE: Illustration is shown with engine removed.
  16. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  17. Remove right front wheel
  18. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  19. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  20. Remove front vehicle floor crossmember -1- to 4 -. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  21. Disconnect exhaust system at both double clamps -arrows-.
  22. Remove VAG1359/2 universal mount from VAG1383A engine/transmission jack and place a piece of wood -1- onto punch instead.
  23. Support rear crossmember using VAG1383A engine/transmission jack.
  24. First remove bolts -1- and -2-, then bolts -3- and -4-.
  25. Release slowly the rear crossmember using VAG1383A engine/transmission jack.
  26. Set aside VAG1383A engine/transmission jack.
  27. Remove nuts (arrows) and rear crossmember.
  28. Remove heat shield -1- for right drive axle.
  29. Remove right drive axle. See «FRONT AXLE SHAFT»(/audi/a4/b6-2000-2006/remont/axle-shafts/#axle-shafts-front-rear__front-axle-shaft).
  30. Remove bracket for front exhaust pipe (arrows).
  31. Unbolt bracket for ATF lines (arrow). NOTE: Observe the rules of cleanliness for working on automatic transmissions: See «RULES FOR CLEANLINESS»(/audi/a4/b6-2000-2006/remont/automatic-trans/#automatic-transmission-overhaul-o1j-multitronic-cvt__rules-for-cleanliness).
  32. Place oil pan underneath.
  33. Remove bolt (arrow) and disconnect ATF lines from transmission.
  34. Tie up ATF lines off to side.
  35. Expose oxygen sensor wire.
  36. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  37. Loosen several turns the lower nuts -1- on left and right of engine mount.
  38. Press transmission to the left.
  39. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Oxygen sensor threads are coated with an assembly paste. This paste must not get into sensor openings. Replace gaskets and self-locking nuts.

  1. Install oxygen sensor. 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) .
  2. Secure ATF lines: See «ATF LINES & ATF COOLER FLUSHING»(/audi/a4/b6-2000-2006/remont/automatic-trans/#automatic-transmission-servicing-at-01j-multitronic-cvt) .
  3. Install subframe: See «SUBFRAME & BUSHINGS»(/audi/a4/b6-2000-2006/remont/suspension-front/#suspension-front) .
  4. Install drive shaft. See «DRIVESHAFT»(/audi/a4/b6-2000-2006/remont/driveshaft-universal-joints/#driveshaft-universal-joints-01v-awd-transaxle) .
  5. Install engine free of stress.
  6. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with automatic transmission 01J. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01J»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) .
  7. Check ATF level. See «CHECKING FLUID LEVELS»(/audi/a4/b6-2000-2006/remont/automatic-trans/#automatic-transmission-servicing-at-01j-multitronic-cvt__checking-fluid-levels) .
ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Mounting straps to transmission25
Drive axle protection to transmission23
Engine mount to console23

TIGHTENING TORQUE SPECIFICATION: RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, 01J AUTO. TRANS.

  1. 3337 wrench, 7-piece set
  2. VAG1383A engine/transmission hoist
  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts for holding plate -3- for solenoid valves (arrows). see scheme 106
  4. Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
  5. Remove hose -4- of crankshaft housing ventilation from air duct -2-.
  6. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  7. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  8. Remove cover -1- in engine compartment (left side).
  9. Remove coolant reservoir (arrow)
  10. Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom of reservoir.
  11. Tie up coolant reservoir with connected coolant hoses -1- to -3- to the side.
  12. Disconnect vacuum hose to brake booster (arrows).
  13. Remove heat shield for harness connectors at left of bulkhead, if installed.
  14. Remove harness connectors -1- to -4- from bracket at left of bulkhead.
  15. Disconnect electrical harness connectors -1- and -4-.
  16. Move wires to oxygen sensors clear.
  17. Unscrew oxygen sensor behind catalytic converter (arrow) e.g. using special tool 3337/7. NOTE: Illustration is shown with engine removed.
  18. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  19. Remove left front wheel.
  20. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  21. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  22. Remove front vehicle floor crossmember -1- to -4-. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  23. Disconnect exhaust system at both double clamps -arrows-.
  24. Remove heat shield above exhaust system.
  25. Remove heat shield for driveshaft from cover for Torsen differential (arrows).
  26. Remove bolts at flange of transmission/driveshaft.
  27. Push driveshaft and rear final drive together. The constant velocity joints can be adjusted axially.
  28. Rest driveshaft on exhaust system.
  29. Position engine/transmission jack V.A.G 1383 A directly behind ATF drip tray. Insert a wood block -1- to protect the transmission housing. CAUTION: The lock carrier must be installed.
  30. First remove bolts -2- and -3- and then mounting bolts -1- and -4- of subframe.
  31. Lower the transmission and subframe slightly using VAG1383A engine/transmission jack.
  32. Remove bolts -1- to -4- for transmission mounts.
  33. Unbolt both transmission supports -5- and -6- at transmission housing and remove transmission supports with transmission mounts.
  34. Lower transmission slowly.
  35. Remove heat shield -1- for left drive axle.
  36. Remove bracket for front exhaust pipe (arrow).
  37. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  38. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Oxygen sensor threads are coated with an assembly paste. This paste must not get into the sensor openings. Replace gaskets and self-locking nuts.

  1. Install oxygen sensor. 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) .
  2. Install transmission supports. See «TRANSMISSION, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/automatic-trans/#automatic-transmission-overhaul-01v__transmission-removing-and-installing) .
  3. Install subframe: See «SUBFRAME & BUSHINGS»(/audi/a4/b6-2000-2006/remont/suspension-front/#suspension-front) .
  4. Installing driveshaft: See «DRIVESHAFT»(/audi/a4/b6-2000-2006/remont/driveshaft-universal-joints/#driveshaft-universal-joints-01v-awd-transaxle) .
  5. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with automatic transmission 01V. See «INDIVIDUAL LEFT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01V»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-left-mounting-components-for-vehicles) .
ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Mounting straps to transmission25
Drive axle protection to transmission23

TIGHTENING TORQUE SPECIFICATION: LEFT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER WITH 01V AUTO. TRANS.

Special Tools and Equipment

  1. 3337 wrench, 7-piece set
  2. VAG1383A engine/transmission hoist

Scheme 44

Scheme 44: Removing
Scheme 44: Removing
  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts (arrows). see scheme 128
  4. Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
  5. Remove air guide -2-.
  6. Remove air filter housing (arrows).
  7. Remove bolts for holding plate -3- for solenoid valves (arrows). see scheme 130
  8. Disconnect electrical harness connector at Mass Air Flow (MAF) sensor.
  9. Remove hose -4- of crankshaft housing ventilation from air duct -2-.
  10. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  11. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  12. Remove harness connectors -1- to -4- from bracket at right of bulkhead.
  13. Disconnect electrical harness connectors -1- and -4-.
  14. Move wires to oxygen sensors clear.
  15. Unscrew oxygen sensor behind catalytic converter (arrow), e.g. using special tool 3337/7. NOTE: Illustration is shown with engine removed.
  16. Remove nut -2- which is accessible from top for exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  17. Remove right front wheel
  18. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  19. Remove quick-release screws -3- and remove rear noise insulation, if installed.
  20. Remove front vehicle floor crossmember -1- to 4 -. NOTE: Flex joint in front exhaust pipe must not be bent more than 10°, otherwise it may be damaged.
  21. Disconnect exhaust system at both double clamps -arrows-.
  22. Remove heat shield above exhaust system.
  23. Remove heat shield for driveshaft from cover for Torsen differential (arrows).
  24. Remove bolts at flange of transmission/driveshaft.
  25. Push driveshaft and rear final drive together. The constant velocity joints can be adjusted axially.
  26. Rest driveshaft on exhaust system.
  27. Position engine/transmission jack V.A.G 1383 A directly behind ATF drip tray. Insert a wood block -1- to protect the transmission housing. CAUTION: The lock carrier must be installed.
  28. First remove bolts -2- and -3- and then mounting bolts -1- and -4- of subframe.
  29. Lower slightly the transmission and subframe using VAG1383A engine/transmission jack.
  30. Remove bolts -1- to -4- for transmission mounts.
  31. Unbolt both transmission supports -5- and -6- at transmission housing and remove transmission supports with transmission mounts.
  32. Lower transmission slowly.
  33. Remove heat shield -1- for right drive axle.
  34. Remove right drive axle. See «FRONT AXLE SHAFT»(/audi/a4/b6-2000-2006/remont/axle-shafts/#axle-shafts-front-rear__front-axle-shaft).
  35. Remove bracket for front exhaust pipe (arrow).
  36. Unbolt bracket for ATF lines (arrow). NOTE: Observe the rules of cleanliness for working on automatic transmissions: See «RULES OF CLEANLINESS FOR WORKING ON AUTOMATIC TRANSMISSION»(/audi/a4/b6-2000-2006/remont/automatic-trans/#automatic-transmission-overhaul-01v__rules-of-cleanliness-for-working-on).
  37. Place oil pan underneath.
  38. Remove bolt (arrow) and disconnect ATF lines from transmission.
  39. Tie up ATF lines off to side.
  40. Expose oxygen sensor wire.
  41. Remove nuts -1- and -3- which are accessible from bottom for front exhaust pipe/exhaust manifold. NOTE: Illustration is shown with engine removed.
  42. Remove front exhaust pipe with catalytic converter.

Installation is the reverse of removal, noting the following

Note. All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation. Oxygen sensor threads are coated with an assembly paste. This paste must not get into the sensor openings. Replace gaskets and self-locking nuts.

  1. Install oxygen sensor. 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) .
  2. Install transmission supports. See «REMOVAL & INSTALLATION - A/T (01V - WITH 1.8L & 3.0L)»(/audi/a4/b6-2000-2006/remont/automatic-trans/#removal-installation-at-01v-with-18l-30l) .
  3. Install subframe: See «SUBFRAME & BUSHINGS»(/audi/a4/b6-2000-2006/remont/suspension-front/#suspension-front) .
  4. Install drive axle. See «FRONT AXLE SHAFT»(/audi/a4/b6-2000-2006/remont/axle-shafts/#axle-shafts-front-rear__front-axle-shaft) .
  5. Installing driveshaft: See «DRIVESHAFT»(/audi/a4/b6-2000-2006/remont/driveshaft-universal-joints/#driveshaft-universal-joints-01v-awd-transaxle) .
  6. Secure ATF lines
  7. Install exhaust system free of stress. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) . NOTE: Individual mounting components for exhaust system to transmission on vehicles with automatic transmission 01V. See «INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH AUTOMATIC TRANSMISSION 01V»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__individual-right-mounting-components-for-vehicles) .
  8. Check ATF level. See «CHECKING FLUID LEVELS»(/audi/a4/b6-2000-2006/remont/automatic-trans/#servicing-at-01v-with-18l-30l__checking-fluid-levels) .
ComponentN.m
Front exhaust pipe with catalytic converter to exhaust manifold27
Front exhaust pipe with catalytic converter to hanging strap25
Mounting straps to transmission25
Drive axle protection to transmission23

TIGHTENING TORQUE SPECIFICATION: RIGHT FRONT EXHAUST PIPE WITH CATALYTIC CONVERTER, WITH 01V AUTO. TRANS.

Align exhaust system tension-free (vehicles with front wheel drive)

Note. Align exhaust system when cold.

Scheme 45

Scheme 45: Align exhaust system tension-free (vehicles with front wheel drive)
Scheme 45: Align exhaust system tension-free (vehicles with front wheel drive)
  1. Remove front vehicle floor crossmember -1- to -4- (55 N.m). Vehicles without clamp between center and rear muffler
  2. Loosen double clamp mounting bolts. See item 14 in «EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__exhaust-system-for-vehicles-with-all) .
  3. Push exhaust system far enough forward (arrow) so that the pretension at the retaining loop at center muffler a = 5 to 9 mm.
  4. Tighten double clamp bolts uniformly to 40 Nm.
  5. Align end pipes. See «TAILPIPES, ALIGNING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__tailpipes-aligning) . Vehicles with clamp between center and rear muffler NOTE: Only for vehicles with double clamp between center and rear mufflers. The rear muffler must also be aligned.
  6. Loosen double clamp mounting bolts at front. See item 14 in «EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__exhaust-system-for-vehicles-with-all) . At rear see item 23 in «EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__exhaust-system-for-vehicles-with-all) .
  7. Push front part of exhaust system far enough forward (arrow) so that the pre-tension at the retaining loop at center muffler a = 5 to 9 mm.
  8. Tighten front double clamp mounting bolts evenly to 40 Nm. See item 14 in «EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__exhaust-system-for-vehicles-with-all) .
  9. Push rear part of exhaust system far enough forward (arrow) so that the pre-tension at rear retaining loops at rear muffler a = 7 to 11 mm.
  10. Align rear muffler horizontally.
  11. Tighten rear double clamp mounting bolts evenly to 40 Nm. See item 23 in «EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__exhaust-system-for-vehicles-with-all) .
  12. Align end pipes. See «TAILPIPES, ALIGNING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__tailpipes-aligning) .

Align exhaust system tension-free (vehicles with all wheel drive)

Note. Align exhaust system when cold.

Scheme 46

Scheme 46: Align exhaust system tension-free (vehicles with all wheel drive)
Scheme 46: Align exhaust system tension-free (vehicles with all wheel drive)
  1. Remove front vehicle floor crossmember -1- to -4- (55 N.m). Vehicles without clamp between center and rear muffler
  2. Loosen double clamp mounting bolts. See item 14 in «THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__three-way-catalytic-converter-twc-checking) .
  3. Push exhaust system far enough forward (arrow) so that the pretension at the right retaining loop at center muffler a = 5 to 9 mm.
  4. Tighten double clamp bolts uniformly to 40 Nm.
  5. Align end pipes. See «TAILPIPES, ALIGNING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__tailpipes-aligning) . Vehicles with clamp between center and rear muffler NOTE: Only for vehicles with double clamp between center and rear mufflers. The center muffler must also be aligned.
  6. Loosen double clamp mounting bolts. See item 14 in «THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__three-way-catalytic-converter-twc-checking) and item 24 in «THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__three-way-catalytic-converter-twc-checking) .
  7. Push front part of exhaust system far enough forward (arrow) so that the pre-tension at the retaining loop at center muffler a = 5 to 9 mm.
  8. Tighten front double clamp mounting bolts evenly to 40 Nm. See item 14 in «THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__three-way-catalytic-converter-twc-checking) .
  9. Push rear part of exhaust system far enough forward (arrow) so that the pre-tension at rear retaining loops at rear muffler a = 7 to 11 mm.
  10. Align rear muffler horizontally.
  11. Tighten rear double clamp mounting bolts evenly to 40 Nm. See item 24 in «THREE WAY CATALYTIC CONVERTER (TWC), CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__three-way-catalytic-converter-twc-checking) .
  12. Align end pipes. See «TAILPIPES, ALIGNING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__tailpipes-aligning) .

Tailpipes, aligning

  1. Check distance of end pipes at left and right to bumper: Dimension x left = dimension x right

If necessary, correct dimension x as follows

  1. Loosen nut (arrow) of brace between exhaust pipes.
  2. Change the distance of the rear mufflers relative to each other.
  3. Tighten nut to 23 Nm.
  4. Check distances -y- and -z- of end pipes to bumper: Dimension y = greater than 20 mm Dimension z = 9 to 14 mm
  5. If necessary, check whether the exhaust system is installed tension-free. See «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) and «ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH ALL WHEEL DRIVE)»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__align-exhaust-system-tension-free-vehicles-with) .

Check exhaust system for proper seal

  1. Start engine and let run at idle.
  2. Seal tailpipes with cloths or plug for the duration of the leak test.
  3. Check for leaks by listening at cylinder head/exhaust manifold, exhaust manifold/front exhaust pipe etc.
  4. Repair leaks.

Secondary air system

The Secondary Air Injection (AIR) system causes the catalytic converter to heat up more quickly, resulting in earlier operating readiness following cold start.

Principle

Due to over-enrichment of the mixture during the cold start phase, there is an increased amount of uncombusted carbon monoxide in the exhaust. Secondary Air Injection (AIR) improves secondary oxidation in the catalytic converter and therefore reduces emissions. The heat produced by secondary oxidation greatly reduces start-up time for the catalytic converter, therefore improving exhaust quality during the cold start phase significantly.

Scheme 47

Scheme 47: Principle
Scheme 47: Principle

Function

  1. In the cold start phase, the ECM -4- activates the secondary air injection pump -2- via the relay for secondary air injection pump -3-. Air reaches the combination valves for Secondary Air Injection (AIR) -5- and -9-.
  2. The Secondary Air Injection (AIR) valve -6- is activated in parallel, which allows the vacuum to reach the combination valves for Secondary Air Injection (AIR) -5- and -9-. The appropriate combination valve for Secondary Air Injection (AIR) thereby opens the path for secondary air to the exhaust channels of the cylinder head.

Component overview

Note. The following list refers to see scheme 160.

  1. from air filter housing
  2. Secondary Air Injection (AIR) Pump Motor -V101- Component location. See «COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__component-location-of-secondary-air-injection). Checking. 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). Removing and installing. See «SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101-, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk).
  3. Secondary Air Injection (AIR) pump relay -J299- Component location. See «COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__component-location-of-secondary-air-injection). Checking. See «SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- AND ACTIVATION, CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk).
  4. Motronic Engine Control Module (ECM) -J220
  5. Right combination valve for Secondary Air Injection (AIR) system Component location. See «COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__combination-valve-for-secondary-air-injection). Checking. See «COMBINATION VALVES FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk). Removing and installing. See «REMOVING AND INSTALLING RIGHT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__removing-and-installing-right-combination-valve).
  6. Secondary Air Injection (AIR) solenoid valve -N112- Component location. See «COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__component-location-of-secondary-air-injection). Checking. See «SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112-, CHECKING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk).
  7. Check-valve Installation position (light/dark side): Arrow points in direction of flow see scheme 160
  8. to Intake manifold
  9. Left combination valve for Secondary Air Injection (AIR) system Component location. See «COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__combination-valve-for-secondary-air-injection). Checking. See «COMBINATION VALVES FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk). Removing and installing. See «REMOVING AND INSTALLING LEFT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__removing-and-installing-left-combination-valve).
  10. Vacuum reservoir Component location: Under wheel housing liner in front left wheel housing

Component location of Secondary Air Injection (AIR) Solenoid Valve -N112

  1. Bolted to holding plate for solenoid valves at rear of engine (arrow).

Component location of Secondary Air Injection (AIR) Pump Motor -V101

  1. At front right in engine compartment below air filter housing - Secondary Air Injection (AIR) Pump Motor -V101- - Electrical harness connector for Secondary Air Injection (AIR) Pump Motor -V101

Component location of Secondary Air Injection (AIR) Pump Relay -J299

  1. In E-box, plenum chamber 3 - Secondary Air Injection (AIR) pump relay -J299- B - Fuse S130 for Secondary Air Injection (AIR) pump

Combination valve for Secondary Air Injection (AIR) system

  1. at rear of cylinder heads NOTE: Right valve is displayed in illustration.

Scheme 48

Scheme 48: Secondary Air Injection (AIR) Pump Motor -V101-, removing and installing
Scheme 48: Secondary Air Injection (AIR) Pump Motor -V101-, removing and installing
  1. Remove cover -1- in engine compartment (right side).
  2. Remove bolts (arrows). see scheme 166
  3. Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
  4. Remove air guide -2-.
  5. Remove air filter housing (arrows).
  6. Remove both bolts which are accessible from top on Secondary Air Injection (AIR) pump bracket.
  7. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  8. Disconnect electrical harness connector -3-.
  9. Disconnect air hoses -1- and -2-.
  10. Remove bolts which are accessible from bottom for secondary Air Injection (AIR) pump bracket.
  11. Remove Secondary Air Injection (AIR) Pump Motor -V101- with bracket.
  12. If necessary, separate Secondary Air Injection (AIR) Pump Motor -V101- from bracket.

Installation is performed in the reverse order of removal.

ComponentN.m
Motor for Secondary Air Injection (AIR) to bracket10
Bracket for motor for Secondary Air Injection (AIR) to chassis10

TIGHTENING TORQUE SPECIFICATION: SECONDARY AIR INJECTION (AIR) PUMP MOTOR

Removing and installing left combination valve for Secondary Air Injection (AIR) system

  1. Remove rear engine cover (arrows).
  2. Remove bolts for holding plate -3- for solenoid valves (arrows). see scheme 171
  3. Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
  4. Remove hose -4- of crankshaft housing ventilation from air duct -2-.
  5. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  6. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  7. Remove cover -1- in engine compartment (left side).
  8. Clamp coolant hose -2- using 3094 hose clamps and disconnect coolant hose from coolant reservoir.
  9. Remove coolant reservoir (arrow)
  10. Disconnect electrical wiring to Engine Coolant Level (ECL) Warning Switch -F66- at bottom of reservoir.
  11. Set coolant reservoir with connected coolant hoses -1- and -3- aside.
  12. Disconnect electrical harness connectors -1- and -2- at Camshaft Position (CMP) Sensor 2 -G163- and Camshaft Position (CMP) Sensor 4 -G301-.
  13. Disconnect hose -3- from crankcase ventilation at cylinder head cover.
  14. Remove bolts -1- at flange of combination valve for Secondary Air Injection (AIR) system.
  15. Loosen nut -3- by several turns.
  16. Remove bolts -2- and disconnect vacuum hose (arrow).
  17. Remove combination valve. NOTE: Illustration is shown with engine removed.

Installation is the reverse of removal, noting the following

Note. Replace gaskets and O-rings.

  1. Fill with coolant. See «COOLANT, DRAINING AND REFILLING»(/audi/a4/b6-2000-2006/remont/cooling-fan/#engine-cooling-30l-6-cylinder-5v-avk) .
ComponentN.m
Combination valve to cylinder head10
Connector tube to
Combination valve10
Coolant pipe10

TIGHTENING TORQUE SPECIFICATION: LEFT COMBINATION VALVE FOR SECONDARY AIR INJECTION SYSTEM

Removing and installing right combination valve for Secondary Air Injection (AIR) system

  1. Remove rear engine cover (arrows).
  2. Remove cover -1- in engine compartment (right side).
  3. Remove bolts for holding plate -3- for solenoid valves (arrows).
  4. Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
  5. Remove hose -4- of crankshaft housing ventilation from air duct -2-.
  6. Remove bolt (arrow) and disconnect air duct -2- at throttle valve control module.
  7. Disconnect hose -1- from air duct. NOTE: Illustration depicts air guide from rear with the engine removed.
  8. Remove bolts -1- and -2- and remove combination valve.
  9. Disconnect vacuum hose (arrow).

Installation is the reverse of removal, noting the following

Note. Replace gaskets.

ComponentN.m
Combination valve to cylinder head10
Connecting tube to combination valve10

TIGHTENING TORQUE SPECIFICATION: RIGHT COMBINATION VALVE FOR SECONDARY AIR INJECTION SYSTEM

Checking secondary air system for proper seal

  1. Check the connection pipes and hoses between Secondary Air Injection (AIR) pump motor and combination valves for proper seal. See «COMPONENT OVERVIEW»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__component-overview) .
  2. Check hoses and hose connections for secure seating.
  3. Check combination valves for Secondary Air Injection (AIR) system for proper seal. See «COMBINATION VALVES FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .

Final procedures

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. VAG1390 Hand Vacuum Pump

Test requirements

  1. No leaks in vacuum lines or hose connections.
  2. Vacuum lines not clogged.

Test sequence

  1. Remove rear engine cover (arrows).
  2. Remove bolts for holding plate for solenoid valves (arrows).
  3. Lift up holding plate and disconnect vacuum hose from Y-piece of combination valve to be checked.
  4. Connect e.g. V.A.G 1390 hand vacuum pump to vacuum hose of combination valve to be checked.
  5. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  6. Disconnect pressure hose (arrow) at Secondary Air Injection (AIR) pump motor and blow air in with light pressure (do not use pressurized air). Both combination valves must be closed, it must not be possible to blow through hose
  7. Operate hand vacuum pump. The relevant combination valve must open, it must be possible to blow through

If the relevant combination valve does not open

  1. Replace combination valve. See «REMOVING AND INSTALLING LEFT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__removing-and-installing-left-combination-valve) or «REMOVING AND INSTALLING RIGHT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk__removing-and-installing-right-combination-valve) .

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. VAG1526A multimeter
  2. V.A.G 1527 B Voltage Tester
  3. VAG1594A connector test kit
  4. VAG1598/31 test box
  1. Fuse for Secondary Air Injection (AIR) OK See appropriate System Wiring Diagrams article.
  2. Fuel Pump (FP) Relay OK; checking. See «FUEL PUMP (FP) RELAY -J17- AND ACTIVATION, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-30l-avk) .
  3. Ignition switched off. NOTE: Voltage is supplied to Secondary Air Injection (AIR) Solenoid Valve -N112- via the Fuel Pump (FP) relay.

Procedure

  1. Remove rear engine cover (arrows).

Checking internal resistance

  1. Disconnect harness connector from Secondary Air Injection (AIR) Solenoid Valve -N112- (arrow).
  2. Connect multimeter at valve for resistance measurement. Specified value: 25...35 ohm

If specified value is not obtained

  1. Replace Secondary Air Injection (AIR) Solenoid Valve -N112-.

If specified value is obtained

Scheme 49

Scheme 49: Checking voltage supply
Scheme 49: Checking voltage supply
  1. Connect VAG1527B voltage tester as follows: HARNESS CONNECTOR TERMINAL 1 SPECIFICATION (SECONDARY AIR INJECTION SOLENOID VALVE) Harness connector Terminal Measure to 1 Engine Ground (GND)
  2. Operate starter briefly. LED must light up.
  3. Switch ignition off.

If LED does not light up

  1. Check wire connection from harness connector terminal 1 to Fuel Pump (FP) Relay -J17- via fuse for open circuit according to wiring diagram. Specified value: Wire resistance max 1.5 ohm
  2. If necessary, repair wire connection.

If LED lights up

Scheme 50

Scheme 50: Checking control wire
Scheme 50: Checking control wire
  1. Connect test box to wiring harness of Engine Control Module (ECM). See «TEST BOX, CONNECTING FOR WIRING AND COMPONENT TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) ; ECM is not connected.
  2. Check the following wire connection for open circuit according to wiring diagram: HARNESS CONNECTOR TERMINAL 2 SPECIFICATION (SECONDARY AIR INJECTION SOLENOID VALVE) Harness connector Terminal Test box Socket 2 44 Specified value: Wire resistance max 1.5 ohm
  3. Also check the wire for short circuit to B+ and Ground (GND). Specified value: INFINITY ohm (no continuity)
  4. If necessary, repair wire connection.

If no malfunctions are found in wire

  1. Replace Engine Control Module (ECM).

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. VAG1526A multimeter
  2. V.A.G 1527 B Voltage Tester
  3. VAG1594A connector test kit
  4. VAG1598/31 test box
  1. Battery voltage at least 12.7 V
  2. Fuse for secondary air pump -S130- (40 A) in E-Box, plenum chamber (position B) OK.
  3. Fuse S234 (in fuse holder, position 34) OK.
  4. Ignition switched off.

Scheme 51

Scheme 51: Test sequence
Scheme 51: Test sequence
  1. Pull off rubber seal of plenum chamber cover in direction of arrow.
  2. Remove cover -1- toward front.
  3. Pry off both covers -3- using a screwdriver.
  4. Loosen hex-nuts -4- by several turns.
  5. Loosen wiper arm -2- from wiper axle by lightly tilting.
  6. Remove hex nuts completely and remove wiper arms.
  7. Disconnect securing clips -1- and remove cowl grill -5-.
  8. Remove cover for E-box, plenum chamber (arrows).
  9. Pry off Engine Control Module (ECM) retaining bracket (arrows) using a screwdriver and set control module aside.
  10. If installed, unclip Transmission Control Module (TCM) retaining bracket and set control module aside.
  11. Connect test box to wiring harness of Engine Control Module (ECM). See «TEST BOX, CONNECTING FOR WIRING AND COMPONENT TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) ; ECM is not connected.
  12. Using wires e.g. from connector test kit V.A.G 1594 A, bridge terminals 1 and 46 on test box.
  13. Switch ignition on. Secondary Air Injection (AIR) Pump Relay -3- (in E-box, plenum chamber) must engage and Secondary Air Injection (AIR) Pump Motor -V101- must run
  1. Secondary Air Injection (AIR) Pump Motor runs: Check voltage supply of the Secondary Air Injection (AIR) pump relay. See «CHECKING VOLTAGE SUPPLY OF SECONDARY AIR INJECTION (AIR) PUMP RELAY»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) . Check activation of the Secondary Air Injection (AIR) pump relay. See «CHECK ACTIVATION OF THE SECONDARY AIR INJECTION (AIR) PUMP RELAY»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-30l-avk) .
  2. Secondary Air Injection (AIR) Pump Motor does not run: Check voltage supply of the Secondary Air Injection (AIR) pump motor. 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) .

Scheme 52

Scheme 52: Checking voltage supply of Secondary Air Injection (AIR) pump relay
Scheme 52: Checking voltage supply of Secondary Air Injection (AIR) pump relay
  1. Remove Secondary Air Injection (AIR) pump relay -3-.
  2. Connect multimeter for voltage measurement as follows. TERMINAL 8 SPECIFICATION: SECONDARY AIR INJECTION PUMP RELAY Relay carrier in E-box, plenum chamber, position 3 Terminal Measure to 8 Engine Ground (GND) Specified value: approx. battery voltage

If specified value is not obtained

Scheme 53

Scheme 53
Scheme 53
  1. Check wire connection from battery + (terminal 30) via Fuse for secondary air pump -S130- to Secondary Air Injection (AIR) Pump Relay -J299- (in relay and fuse carrier in E-Box, plenum chamber, position 3) for open circuit according to wiring diagram. Specified value: Wire resistance max 1.5 ohm
  2. Connect multimeter for voltage measurement as follows. TERMINAL 4 SPECIFICATION: SECONDARY AIR INJECTION PUMP RELAY Relay carrier in E-box, plenum chamber, position 3 Terminal Measure to 4 Engine Ground (GND)
  3. Operate starter briefly. Specified value: approx. battery voltage
  4. Switch ignition off.

If specified value is not obtained

  1. Check wire connection from Secondary Air Injection (AIR) Pump Relay -J299- (in 3-socket relay carrier in E-box, plenum chamber) via fuse S234 (in fuse holder, position 34) to Fuel Pump (FP) relay for open circuit according to wiring diagram. Specified value: Wire resistance max 1.5 ohm

Scheme 54

Scheme 54: Check activation of the Secondary Air Injection (AIR) pump relay
Scheme 54: Check activation of the Secondary Air Injection (AIR) pump relay
  1. Remove Secondary Air Injection (AIR) pump relay -3-.
  2. Connect test box to wiring harness of Engine Control Module (ECM). See «TEST BOX, CONNECTING FOR WIRING AND COMPONENT TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) ; ECM is not connected.
  3. Check the following wire connection for open circuit according to wiring diagram: TERMINAL 6 SPECIFICATION: SECONDARY AIR INJECTION PUMP RELAY Relay carrier in E-box, plenum chamber, position 3 Terminal Test box Socket 6 46 Specified value: Wire resistance max 1.5 ohm
  4. Also check the wire for short circuit to B+ and Ground (GND). Specified value: INFINITY ohm (no continuity)

If no malfunctions are detected

  1. Replace Secondary Air Injection (AIR) Pump Relay -J299-.

Check voltage supply of the Secondary Air Injection (AIR) pump motor

  1. Remove bolts or quick-release screws -1- and -2- and remove front noise insulation.
  2. Disconnect electrical harness connector -2- at Secondary Air Injection (AIR) Pump Motor -V101- -Item 1-.
  3. Connect VAG1527B voltage tester between terminals 1 and 2
  4. Connect test box to wiring harness of Engine Control Module (ECM). See «TEST BOX, CONNECTING FOR WIRING AND COMPONENT TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-30l-avk) ; ECM is not connected.
  5. Bridge terminals 1 and 46 at test box using wires e.g. from V.A.G 1594 A adapter test kit. LED must light up.

If LED does not light up

  1. Check wire connection from terminal 2 of harness connector to Secondary Air Injection (AIR) Pump Relay -J299- (in relay carrier in E-Box, plenum chamber, position 3) for open circuit according to wiring diagram.
  2. Check wire connection from terminal 1 of harness connector to Ground (GND) for open circuit according to wiring diagram. Specified value: Wire resistance max 1.5 ohm

If no malfunctions are detected

  1. Replace Secondary Air Injection (AIR) Pump Motor -V101-.

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.

See also:
• CHECK OXYGEN SENSOR AND OXYGEN SENSOR CONTROL BEHIND CATALYTIC CONVERTER
• TEST-ID 01: CATALYTIC CONVERTER
• SUBFRAME & BUSHINGS
• FRONT AXLE SHAFT
• RULES FOR CLEANLINESS
• ATF LINES & ATF COOLER FLUSHING
• DRIVESHAFT
• CHECKING FLUID LEVELS
• TRANSMISSION, REMOVING AND INSTALLING
• RULES OF CLEANLINESS FOR WORKING ON AUTOMATIC TRANSMISSION
• REMOVAL & INSTALLATION - A/T (01V - WITH 1.8L & 3.0L)
• CHECKING FLUID LEVELS
• COOLANT, DRAINING AND REFILLING
• MODE 3: CHECK DTC MEMORY
• MODE 4: RESET/ERASE DIAGNOSTIC DATA
• FUEL PUMP (FP) RELAY -J17- AND ACTIVATION, CHECKING
• ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE)
• OXYGEN SENSORS BEFORE CATALYTIC CONVERTER, REMOVING AND INSTALLING
• Individual left mounting components for vehicles with manual transmission
• INSTALLED POSITION OF FRONT CLAMPING SLEEVES
• INDIVIDUAL RIGHT MOUNTING COMPONENTS FOR VEHICLES WITH MANUAL TRANSMISSION
• INSTALLED POSITION OF REAR CLAMPING SLEEVES
• EXHAUST SYSTEM FOR VEHICLES WITH ALL WHEEL DRIVE (AWD) - COMPONENT OVERVIEW
• TAILPIPES, ALIGNING
• THREE WAY CATALYTIC CONVERTER (TWC), CHECKING
• COMPONENT LOCATION OF SECONDARY AIR INJECTION (AIR) PUMP MOTOR -V101
• CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR
• COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM
• REMOVING AND INSTALLING RIGHT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM
• REMOVING AND INSTALLING LEFT COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM
• COMPONENT OVERVIEW

More articles — Engine