Ignition/glow Plug System, Generic Scan Tool (2.8l v6 Aha, Atq) Audi A6 C5

Ignition system, general notes

1. This section deals specifically with ignition -related components. The other components of the injection and ignition system. See «MULTIPORT FUEL INJECTION (MFI)»(/audi/a6/c5-1997-2001/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-28l-v6-aha-atq) .
2. For the electric components to work properly, a voltage of at least 11.5 V is required.
3. The battery must only be disconnected and connected with the ignition is switched off, since the Engine Control Module (ECM) can otherwise be damaged.
4. The Engine Control Module (ECM) is equipped with an On Board Diagnostic (OBD)
5. Components marked with * are tested via On Board Diagnostic (OBD). See «DIAGNOSTIC MODE 3: CHECK DTC MEMORY»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
6. It is possible that the control module will recognize a malfunction and store a DTC during some tests. Therefore the following work steps must be performed in the mentioned sequence after ending all tests and repairs. - Check DTC memory. See «DIAGNOSTIC MODE 3: CHECK DTC MEMORY»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) . - Erase DTC memory. See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) . - For completion, generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

Safety precautions, see SAFETY PRECAUTIONS .

Test data, spark plugs, see TEST DATA, SPARK PLUGS .

Parts of ignition, removing and installing

Note. Cylinder bank 1 is located on right side in direction of travel. Cylinder bank 2 is located on left side in direction of travel. Engine Control Module (ECM) with harness connectors. See COMPONENT LOCATIONS, OVERVIEW .

Note. The following list refers to items in (Scheme 88).

1. Spark plug, 30 Nm Type and spark plug gap. See «TEST DATA, SPARK PLUGS»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__test-data-spark-plugs) .
2. Spark plug connectors with ignition wires Check, see «IGNITION COIL, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__ignition-coil-checking)
3. Spacer sleeve
4. Rubber grommet
5. 10 Nm
6. Ignition Coil -N152- with power output stage with marking for ignition wires, do not interchange Checking, see «IGNITION COIL, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__ignition-coil-checking)
7. Connector black, 5 -pin
8. 3-pin harness connector Terminals are gold-plated
9. 20 Nm Tightening torque affects function of Knock Sensor (KS)
10. Knock Sensor (KS) 2 -G66-* Cylinder bank 2 Terminals of sensor and connector are gold-plated Checking. See «KNOCK SENSORS, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__knock-sensors-checking)
11. Knock Sensor (KS) 1 -G61-* Cylinder bank 1 Terminals of sensor and connector are gold-plated Checking, see «KNOCK SENSORS, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__knock-sensors-checking)
12. 10 Nm
13. Camshaft Position (CMP) Sensor 2 -G163-* Cylinder bank 2 Checking, see «CAMSHAFT POSITION (CMP) SENSOR, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq)
14. 25 Nm
15. Washer Conical
16. Face plate for Camshaft Position (CMP) sensor note position when installing
17. Connector black, 3 -pin for Camshaft Position (CMP) Sensor -G40- or Camshaft Position (CMP) Sensor 2 -G163
18. Camshaft Position (CMP) Sensor - G40-* Cylinder bank 1 Checking, see «CAMSHAFT POSITION (CMP) SENSOR, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq)

Exploded View Of Ignition System. Scheme 88

Camshaft adjustment, servicing

Cylinder head, removing and installing

See CYLINDER HEAD .

Valvetrain, servicing

See 2.8L V6 30-VALVE .

Note. Cylinder bank 1 is located on right side in direction of travel. Cylinder bank 2 is located on left side in direction of travel.

Note. The following list refers to items in (Scheme 89).

1. Double bearing cap
2. 10 Nm
3. Exhaust camshaft bearing cap
4. Exhaust camshaft
5. Cap Always replace
6. Intake camshaft bearing cap
7. Intake camshaft
8. Drive chain Mark direction of travel (installation position) before removing
9. Camshaft adjuster Check valves for camshaft adjustment. See «CAMSHAFT ADJUSTMENT VALVES, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__camshaft-adjustment-valves-checking) .
10. 10 Nm
11. Valve for camshaft adjustment only together with camshaft adjuster item 9, replacing Cylinder bank 1: Valve -1- for camshaft adjustment -N205-* Checking, see «CAMSHAFT ADJUSTMENT VALVES, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__camshaft-adjustment-valves-checking) Cylinder bank 2: Valve -2- for camshaft adjustment -N208-* Checking, see «CAMSHAFT ADJUSTMENT VALVES, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq__camshaft-adjustment-valves-checking)
12. Gasket Rubber/metal seal Always replace
13. Gasket Always replace
14. Cylinder head

Exploded View Of Camshafts And Camshaft Adjustment Components. Scheme 89

Safety precautions

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system, always observe the following

Scheme 90

1. Do not touch or disconnect ignition wires when engine is running or turning at starting RPM.
2. Only disconnect and reconnect wires for injection and ignition system, including test leads, when ignition is turned off. (Scheme 90): Disconnecting Connector -1- From Ignition Coil -N152 - (-2-)
3. To operate engine at starting RPM without starting, for example during the compression test, disconnect connector -1- from Ignition Coil -N152 - (-2-) and remove Fuel Pump (FP) fuse (28).

If special testing equipment is required during road test, note the following

1. Test equipment must always be secured to the rear seat and operated from there by a second person.

If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in the event of an accident involving deployment of the passenger-side airbag.

Test Data, Spark Plugs

TEST DATA, SPARK PLUGS

Recommended special tools and equipment

1. VAG1526 multimeter or VAG1715 multimeter
2. VAG1594 connector test kit
3. Wiring diagram

Scheme 91

1. The respective fuses of Motronic Engine Control Module (ECM) - J220- must be OK: (Scheme 91): Identifying Fuse Holder
2. Battery voltage must be at least 11.5 volts.
3. All electrical consumers like, for example, lights and rear window heating must be switched off.
4. Parking brake must be engaged or else daylight driving lights will be switched on.
5. Ground (GND) connections between engine and chassis must be OK.

Scheme 92

Scheme 93

1. Disconnect 3-pin connectors from hall sensors. The locations of the Camshaft Position (CMP) sensors are as follows: - Cylinder bank 1 Camshaft Position (CMP) Sensor -G40-Right front cylinder head - Cylinder bank 2 Camshaft Position (CMP) Sensor 2 -G163-Left rear cylinder head (Scheme 92): Disconnecting Pin Connectors From Hall Effect (CMP) Sensors NOTE: Cylinder bank 1 = in driving direction, right Cylinder bank 2 = in driving direction, left Before disconnecting harness connectors, mark allocation to component.
2. Connect multimeter between terminal 1 (B+) and 3 (Ground -GND-) for voltage measurement for the respective connector for hall sensor. (Scheme 93): Identifying CMP Sensor Harness Connector Terminals
3. Switch ignition on. Specified value: at least 9.0 V
4. Switch ignition off.

If there is no voltage

Scheme 94

1. Connect test box to control module wiring harness. See «TEST BOX, CONNECTING FOR WIRING TEST»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq). (Scheme 94): Identifying CMP Sensor Harness Connector Terminals
2. Check wires between test box and 3 -pin connector for open circuits according to wiring diagram.

Wire resistance: max: 1.5ohm

Vehicles with engine code AHA

CMP SENSOR CIRCUIT TEST - ENGINE CODE AHA

Vehicles with engine code ATQ

CMP SENSOR CIRCUIT TEST - ENGINE CODE ATQ

Continuation for all vehicles

1. Also check wires for short circuit to each other. Specified value: INFINITY ohm

If no malfunctions are found in the wires and there was voltage between terminals 1 + 3

1. Replace the respective hall sensor: Camshaft Position (CMP) Sensor -G40- cylinder bank 1 item 18 Camshaft Position (CMP) Sensor 2 -G163- cylinder bank 2, item 13
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

If no errors are found in wires and there was no voltage between terminals 1 + 3

1. Replace Engine Control Module (ECM). See «ENGINE CONTROL MODULE (ECM), REPLACING»(/audi/a6/c5-1997-2001/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-28l-v6-aha-atq__engine-control-module-ecm-replacing) .

Ignition coil, checking

Note. Ignition coils and power output stage are one component and are installed in ignition transformer. Primary resistance of ignition coils cannot be measured. Secondary resistance should be tested only with ignition wires connected to ignition coils. To do this, measurements must be made between spark plug connectors of appropriate ignition coil. This measurement also measures the interference-suppression resistors of all ignition wires.

1. VAG1526 multimeter or VAG1715 multimeter
2. VAG1527 voltage test lamp
3. VAG1594 connector test kit
4. Wiring diagram

Scheme 95

1. The respective fuses of Ignition Coil -N152- must be OK: (Scheme 95): Identifying Fuse Holder
2. Fuel Pump (FP) Relay -J17- must be OK, check
3. Battery voltage must be at least 11.5 volts.
4. All electrical consumers like, for example, lights and rear window heating must be switched off.
5. Parking brake must be engaged or else daylight driving lights will be switched on.
6. If vehicle is equipped with an A/C system, it must be switched off.
7. Ground (GND) connections between engine and chassis must be OK.
8. Engine speed (RPM) sensor must be OK. See «ENGINE SPEED (RPM) SENSOR -G28-, CHECKING»(/audi/a6/c5-1997-2001/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-28l-v6-aha-atq).
9. Camshaft Position (CMP) sensors must be OK. See «CAMSHAFT POSITION (CMP) SENSOR, CHECKING»(/audi/a6/c5-1997-2001/remont/ignition-system/#ignitionglow-plug-system-generic-scan-tool-28l-v6-aha-atq).
10. Ignition switched off.

Test sequence

1. Disconnect 5-pin connector -1- from Ignition Coil -N152 - (-2-).

Disconnecting Pin Connector From Ignition Coil -N152 - (-2-). Scheme 96

Checking ignition coils with ignition wires

1. Disconnect spark plug connectors.

1. Measure resistance between the two spark plug connectors of an ignition coil. Specified value: 18 to 25 k ohm

Measuring Resistance Between Spark Plug Connectors Of An Ignition Coil - Engine Code AHA. Scheme 97

Measuring Resistance Between Two Spark Plug Connectors Of An Ignition Coil - Engine Code ATQ. Scheme 98

1. Measure resistance between the two spark plug connectors of an ignition coil. Specified value: 16 to 27 k ohm

1. Repeat test on other two ignition coils.

If specified values are not obtained

1. Pull ignition wires off ignition coils.

1. Test resistance of ignition wires. Specified value: 4 to 6 kohm

1. Test resistance of ignition wires. Specified value: 3 to 7 kohm

If specified values are not obtained

1. Replace the respective spark plug connectors with the ignition wires.
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

If specified values are obtained

1. Check secondary resistance of ignition coils. Specified value: 8 to 14 k ohm

Checking Secondary Resistance Of Ignition Coils. Scheme 99

If specified values are not obtained

1. Replace Ignition Coil -N152-, item 6 .
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

If specified values are obtained

Scheme 100

1. Pull connectors -1- off connection -2- of all fuel injectors. (Scheme 100): Pulling Connectors Off Of All Fuel Injectors
2. Connect multimeter to terminals 1 + 2 of the disconnected connector for voltage measurement.
3. Operate starter Specified value: at least 11.5 V
4. Switch ignition off.

If there is no voltage

1. Check wire between 5 -pin connector terminal 1 and relay carrier for open circuits according to wiring diagram. Wire resistance: max: 1.5 ohm
2. Check for open circuit in wire between 5 -pin connector terminal 2 and Ground (GND) according to wiring diagram. Wire resistance: max: 1.5 ohm
3. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
4. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

If specified values are obtained

Scheme 101

Scheme 102

1. Pull connectors -1- off connection -2- of all fuel injectors. (Scheme 102): Pulling Connectors Off Of All Fuel Injectors
2. Connect VAG1527 diode test lamp to terminals 2 + 3 of connector. see scheme 16: Identifying Ignition Coil Harness Connector Terminals
3. Operate starter and test ignition signal from Engine Control Module (ECM). LED should flicker.
4. Repeat test between terminals 2 + 4 and 2 + 5.

If LED does not flicker

1. Connect test box to control module wiring harness. See «TEST BOX, CONNECTING FOR WIRING TEST»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

1. Check wires between test box and 5 -pin connector for open circuit according to wiring diagram. Terminal 3 + socket 71 Terminal 4 + socket 78 Terminal 5 + socket 70 Wire resistance: max: 1.5 ohm

Identifying Ignition Coil Harness Connector Terminals. Scheme 103

1. Check wires between test box and 5 -pin connector for open circuit according to wiring diagram. Terminal 3 + socket 102 Terminal 4 + socket 103 Terminal 5 + socket 94 Wire resistance: max: 1.5ohm

Identifying Ignition Coil Harness Connector Terminals. Scheme 104

1. Also check wires for short circuit to each other. Specified value: INFINITY ohm

If no errors are found in wires and there was voltage between terminals 1 + 2

1. Replace Engine Control Module (ECM). See «ENGINE CONTROL MODULE (ECM), REPLACING»(/audi/a6/c5-1997-2001/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-28l-v6-aha-atq__engine-control-module-ecm-replacing) .

If voltage supply and activation are OK

1. Replace Ignition Coil -N152-, item 6 .
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

Knock sensors, checking

Note. To remove and install Knock Sensors, intake manifold must be removed. See AIR FILTER, DISASSEMBLING AND ASSEMBLING , item 25. Contact surfaces between knock sensor and cylinder block must be free of corrosion, dirt and grease. For the Knock Sensors to function properly, it is important for tightening torque to be exactly 20 Nm. Use only gold -plated terminals when servicing terminals in harness connector of knock sensors.

1. VAG1526 multimeter or VAG1715 multimeter
2. VAG1594 connector test kit
3. Wiring diagram

Test requirements

1. Knock sensor securing bolt tightened to 20 Nm.
2. Ignition switched off.

Scheme 105

1. Disconnect 3-pin harness connector to knock sensors: (Scheme 105): Disconnecting 3-Pin Harness Connector To Knock Sensors - Knock Sensor (KS) 1 -G61- - Knock Sensor (KS) 2 -G66- NOTE: To reach the harness connector of Knock Sensor (KS) 2 -G66-, remove coolant reservoir securing screws and tilt coolant reservoir to the side. The coolant hoses remain connected. Cylinder bank 1 = in driving direction, right Cylinder bank 2 = in driving direction, left
2. Measure resistance between terminals 1 + 2, 1 + 3, and 2 + 3 at connectors to knock sensors. Specified value: INFINITY ohm (Scheme 106): Identifying Knock Sensor Terminals
3. Connect test box to control module wiring harness. See «TEST BOX, CONNECTING FOR WIRING TEST»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq). (Scheme 107): Identifying Knock Sensor Harness Connector Terminals
4. Check wires between test box and 3 -pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram. Wire resistance: max: 1.5 ohm

KNOCK SENSOR CIRCUIT TEST - ENGINE CODE AHA

1. Also test lines at socket 67 for shorts to sockets 60 and 68. Specified value: INFINITY ohm

KNOCK SENSOR CIRCUIT TEST - ENGINE CODE ATQ

1. Also check wires for short circuit to each other. Specified value: INFINITY ohm

If no malfunctions are found in wires

1. Replace the respective knock sensor: Knock Sensor (KS) 1 -G61- cylinder bank 1, item 11 Knock Sensor (KS) 2 -G66- cylinder bank 1, item 10
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

Camshaft adjustment valves, checking

Function

The camshaft adjustment is load - and RPM dependent. The electrical valves for camshaft adjustment switch oil pressure onto camshaft adjusters (mechanical adjustment mechanisms), which then adjust the camshafts.

1. VAG1526 multimeter or VAG1715 multimeter
2. VAG1594 connector test kit
3. Wiring diagram

Scheme 106

1. The respective fuses of the Valve -1- for camshaft adjustment - N205- and Valve -2- for camshaft adjustment -N208- must be OK: (Scheme 108): Identifying Fuse Holder
2. Fuel Pump (FP) Relay -J17- must be OK, check
3. Battery voltage must be at least 11.5 volts.
4. All electrical consumers like, for example, lights and rear window heating must be switched off.
5. Parking brake must be engaged or else daylight driving lights will be switched on.
6. If vehicle is equipped with an A/C system, it must be switched off.
7. Ground (GND) connections between engine and chassis must be OK.
8. Ignition switched off.

Scheme 107

1. Remove 2-pin harness connector -1- to the respective Valve -2- for camshaft adjustment: see scheme 23: Checking Pin Harness Connector To Camshaft Adjustment Valve

Note. Before disconnecting harness connectors, mark allocation to component.

Scheme 108

1. Measure resistance between terminals of the respective valve for camshaft adjustment. Specified value: 10 to 18 ohm see scheme 24: Measuring Resistance Between Terminals Of Camshaft Adjustment Valve

If specified value is not obtained

1. Replace the respective Valve -1- for camshaft adjustment -N205- Valve -2- for camshaft adjustment -N208-, item. 11 .
2. Erase DTC memory of Engine Control Module (ECM). See «DIAGNOSTIC MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .
3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

If specified value is obtained

1. Connect test box to control module wiring harness. See «TEST BOX, CONNECTING FOR WIRING TEST»(/audi/a6/c5-1997-2001/remont/testing-diagnostics/#on-board-diagnostic-obd-generic-scan-tool-28l-v6-aha-atq) .

1. Check wire between test box socket 55 + 2-pin connector terminal 2 for open circuit according to wiring diagram. Wire resistance: max: 1.5

Identifying Camshaft Adjustment Valve Harness Connector Terminals. Scheme 109

1. Check wire between test box socket 115 + 2 -pin connector terminal 2 for open circuit according to wiring diagram. Wire resistance: max: 1.5ohm

Identifying Camshaft Adjustment Valve Harness Connector Terminals. Scheme 110

1. Also check wires for short circuit to B+ and Ground (GND). Specified value: INFINITY ohm
2. Check wire between 2 -pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- for open circuit according to wiring diagram. Wire resistance: max: 1.5 ohm

If voltage supply and wires are OK

1. Replace Motronic Engine Control Module (ECM) -J220-. See «ENGINE CONTROL MODULE (ECM), REPLACING»(/audi/a6/c5-1997-2001/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-28l-v6-aha-atq__engine-control-module-ecm-replacing) .

See also:
• MULTIPORT FUEL INJECTION (MFI)
• DIAGNOSTIC MODE 3: CHECK DTC MEMORY
• COMPONENT LOCATIONS, OVERVIEW
• ENGINE CONTROL MODULE (ECM), REPLACING
• AIR FILTER, DISASSEMBLING AND ASSEMBLING
• SAFETY PRECAUTIONS
• TEST DATA, SPARK PLUGS
• IGNITION COIL, CHECKING
• KNOCK SENSORS, CHECKING
• CAMSHAFT POSITION (CMP) SENSOR, CHECKING
• CAMSHAFT ADJUSTMENT VALVES, CHECKING