3.0l v6 5v Engine Controls - Generic Scan Tool, Engine Codes: Avk, Bgn Audi A4 B6

Fuel Supply System

The following table provides quick links to all chapters in this section.

For all fuel supply system component locations. Refer to 20 - FUEL SUPPLY SYSTEM .

For all fuel supply system removal/installation procedures and torque specifications. Refer to 20 - FUEL SUPPLY SYSTEM .

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool. The manufacturers test box Test Box 105 Pin VAG1598/31 is available for purchase or rental.

> Safety Precautions

> Clean Working Conditions

> Transfer Fuel Pump (FP) G6 Electrical, Checking

> Fuel Delivery, Checking

Safety Precautions

Perform the following steps before beginning work on the Fuel system

1. Disconnect the battery Ground (GND) cable with the ignition switched off.
2. Open the fuel filler flap briefly and then close again.

When removing and installing components from full or partially full fuel tanks, observe the following

1. The fuel tank must only be partially full. How much fuel can remain in the fuel tank may be read in the respective work description. Empty the fuel tank if necessary.
2. Before starting work, switch on the exhaust extraction system and place an extraction hose close to the installation opening of the fuel tank to extract escaping fuel fumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m 3 /h can be used.
3. Prevent fuel from contacting the skin! Wear fuel-resistant gloves!

Clean Working Conditions

When working on the fuel supply/injection system, pay careful attention to the following rules of cleanliness

1. Thoroughly clean all connections and the surrounding area before disconnecting.
2. Place parts that have been removed on a clean surface and cover them. Do not use fluffy cloths!
3. Carefully cover over opened components or seal, if repairs are not performed immediately.
4. Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored unpacked (e.g. in tool boxes etc.).

1. When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely necessary.

Transfer Fuel Pump (FP) G6 Electrical, Checking

Special tools, testers and auxiliary items required

1. Hand held remote control (jumper).
2. Multimeter.
3. Electrical connector test lead set.

Test conditions

1. Battery voltage 12.5 V.
2. Fuse S228 OK.
3. Fuse S132 OK.
4. Fuse S134 OK.

1. Fuel Pump (FP) Relay J17 OK.
2. Fuel filter OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Start diagnosis

TT Coupe

1. Remove the rear seat bench. Refer to --> «72 - SEAT - FRAMES»(/audi/a4/b6-2000-2006/remont/gauges-instrument-panels/#body-interior) «72 - SEAT - FRAMES»(/audi/a4/b6-2000-2006/remont/gauges-instrument-panels/#body-interior-cabriolet) for BODY INTERIOR - CABRIOLET .

TT Roadster

1. Remove the right rear side trim panel. Refer to --> «70 - INTERIOR TRIM»(/audi/a4/b6-2000-2006/remont/gauges-instrument-panels/#body-interior) «70 - INTERIOR TRIM»(/audi/a4/b6-2000-2006/remont/gauges-instrument-panels/#body-interior-cabriolet) for BODY INTERIOR - CABRIOLET .

All vehicles

Scheme 590

1. Remove the cover retainers - arrows - from the right sealing flange.

Scheme 591

1. Press both latches in direction of - arrow - and remove the engine compartment E-box cover.

Scheme 592

1. Remove Fuse SB1 from "fuse carrier ST2" - 2 -.

Scheme 593

1. Connect a Hand held remote control (jumper) to the terminal on Fuse SB1 and to battery "+".
2. Press the switch on the Hand held remote control (jumper).

Note. The Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.

1. Listen for an operating noise from the Transfer Fuel Pump (FP) G6.

If no operating noise is heard

1. Remove the fuel delivery unit. Refer to --> «20 - FUEL SUPPLY SYSTEM»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-system) .

Scheme 594

1. Using a Multimeter , check the Transfer Fuel Pump (FP) G6 electrical connector terminals 1 to 4 for continuity.

Specified value: 0 ohms.

If the specification was not obtained

1. Check the Transfer Fuel Pump (FP) G6 electrical harness connector terminal 1 to 4 for a short circuit to Battery positive (+) or an open circuit.
2. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and the resistance value was not OK

1. Replace the Transfer Fuel Pump (FP) G6. Refer to «20 - FUEL SUPPLY SYSTEM»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-system) .

If no malfunction is detected in the wiring and the resistance value was OK

If an operating noise is heard

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the Transfer Fuel Pump (FP) G6 electrical harness connector terminal 1 to Ground (GND) for voltage.
3. Switch the ignition off.

Specified value: Battery voltage.

If the specification was not obtained

1. Check the Transfer Fuel Pump (FP) G6 electrical harness connector terminal 1 to the Fuel Pump (FP) Relay J17 socket 23/87 for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specification was obtained

Checking Ground (GND)

1. Using a Multimeter , check the Transfer Fuel Pump (FP) G6 electrical harness connector terminal 5 to the Ground (GND) connection on right lower A-pillar for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the Transfer Fuel Pump (FP) G6 electrical harness connector terminal 4 to the Ground (GND) connection on right lower A-pillar for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Replace the Fuel Pump (FP) Relay J17.
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Fuel Delivery, Checking

Special tools, testers and auxiliary items required

1. Hand held remote control (jumper).
2. Multimeter.
3. Electrical connector test lead set.
4. Measuring container, fuel-resistant.

Test conditions

1. Battery voltage 12.5 V
2. Fuel filter OK
3. Fuel tank at least 1 / 4 filled.
4. Fuel pressure regulator OK.

1. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Start diagnosis

1. Open cover from fuse box at left side of instrument cluster.
2. Remove fuse 28 at fuse holder.
3. Connect remote control connection at right terminal of socket of fuse S28.
4. Connect alligator clip to vehicle battery B+.

1. Remove the fuel filler cap from fuel filler.

Scheme 595

1. Remove the bolt - 1 - and the cover above reservoir - arrow -.

Scheme 596

1. Disconnect the fuel return line - 1 - from the line connection - 2 - by pressing the release button.
2. Connect the Fuel pressure test set (high pressure) onto the disconnected fuel return line.
3. Press switch on remote control for 15 Sec.

Scheme 597

1. Compare quantity of fuel delivered with minimum delivery rate in the diagram (cm 3 /15s).

Note. Voltage at the fuel pump with engine stopped and fuel pump running is approx. 2 volts less than battery voltage.

If minimum delivery quantity is not obtained, the following malfunctions may be present

1. Fuel lines pinched.
2. Fuel filter clogged.
3. Fuel pump faulty.

Assembly is performed in reverse order of removal.

End of procedure

EVAP System

The following table provides quick links to all chapters in this section.

For all EVAP system component locations and hose routing. Refer to --> 20 - FUEL SUPPLY SYSTEM .

For the EVAP system hose routing. Refer to 20 - FUEL SUPPLY SYSTEM .

For all EVAP system removal/installation procedures and torque specifications. Refer to 20 - FUEL SUPPLY SYSTEM .

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool.

> EVAP System, Detecting Leaks

> EVAP System, Checking for Leaks

> EVAP Canister Purge Regulator Valve N80, Checking

> Leak Detection Pump V144, Checking

EVAP System, Detecting Leaks

Function

The leak detection system recognizes leaks in the complete fuel system, including the fuel tank, EVAP canister and the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80.

On the mechanical side, the leak detection system consists mainly of a vacuum-driven diaphragm pump equipped with a reed contact on the actuation rod of the pump diaphragm. The pump is supplied with vacuum by the engine intake stroke.

1. When leak detection is activated, the diaphragm pump pumps the fuel system up to 20 30 mbar. The pump diaphragm is then moved out so that the reed contact at the operating rod remains in the "open" position.
2. During the leak diagnosis, the reed contact is monitored to check if it remains open within 10 Sec. This indicates the system is sealed.
3. If the pressure falls (indicating a leak), the diaphragm moves back and the reed contact closes.
4. If the reed contact closes within 10 Sec of leak detection time, a further test is performed: In this case the diaphragm pump pumps four times again. The Motronic Engine Control Module (ECM) J220 measures the time for each of the four pumps until the reed contact is closed again. From that, the control module can recognize a "small leak" (greater than 1 mm in diameter) or a "large leak".

Leak diagnosis is activated automatically shortly following every engine start. If a malfunction is determined, an entry is made to the Diagnostic Trouble Code (DTC) memory. The Malfunction Indicator Lamp (MIL) K83 in the instrument cluster lights up if the malfunction is recognized for two subsequent starts.

EVAP System, Checking for Leaks

Special tools, testers and auxiliary items required

1. Smoke tester.
2. EVAP and Fuel Supply System Vacuum hose and line routing diagram.

Note. Secure all hose connections using hose clamps appropriate for the model type Replace seals and gaskets when performing repair work.

Leak checking

1. Using a Smoke tester , check the Evaporative Emission (EVAP) canister system for leaks.

Note. Always follow the manufacturers directions for the proper installation and operation of the Smoke tester being used.

If a leak is detected

1. Check the fuel filler cap seal for damage and for proper installation. Replace if necessary.
2. Check the seals under the locking flanges and the union nuts are properly tightened on the fuel tank.
3. Check all hose connections of the fuel supply system and replace or repair any leaking lines.
4. Check all hose connections of the EVAP system and replace or repair any leaking lines.

1. Repair or replace any damaged component.

If no leaks are found in the EVAP and Fuel Supply System

1. Erase the DTC memory if a DTC was set. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If a DTC was set and does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no leaks are found in the EVAP and Fuel Supply System

1. Check the DTC memory for any DTC codes pertaining to the EVAP and Fuel Supply Systems. If a DTC is stored, perform the diagnostic test procedure for the suspected component. Refer to --> «Diagnostic Mode 03 - Interrogating Fault Memory»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-03-interrogating-fault) .

End diagnosis.

If the DTC does return and no leaks are found in the EVAP and Fuel Supply System

1. Check the DTC memory for any DTC codes pertaining to the EVAP and Fuel Supply Systems. If a DTC is stored, perform the diagnostic test procedure for the suspected component. Refer to --> «Diagnostic Mode 03 - Interrogating Fault Memory»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-03-interrogating-fault) .

End diagnosis.

EVAP Canister Purge Regulator Valve N80, Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S234 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. The ignition switched off.

Note. Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 is supplied by the Fuel Pump (FP) Relay J17.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector.

Checking internal resistance

Scheme 598

1. Using a Multimeter , check the resistance between terminals 1 and 2 of the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80.

Specified value: 22.0 to 30.0 ohms.

If the specified value was not obtained

1. Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80.

If the specification is obtained

Checking voltage supply

Scheme 599

1. Using a Multimeter , check the electrical harness connector terminal 1 to Ground (GND) for voltage.

1. Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the wiring connection from the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical harness connector terminal 1 to the Fuel Pump (FP) Relay J17 terminal 19/86 for an open circuit or a short circuit to Battery positive (+).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 electrical connector terminal 2 to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 64 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

1. Check the wiring for a short circuit to Battery positive (+), Ground (GND) or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If the specification was obtained

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Leak Detection Pump V144, Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S234 OK.
2. The Fuel Pump (FP) Relay J17 OK.
3. The ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .
2. Remove the left rear wheel housing liner. Refer to «66 EXTERIOR EQUIPMENT»(/audi/a4/b6-2000-2006/remont/door-locks-anti-theft-systems/#body-exterior) «66 - EXTERIOR EQUIPMENT»(/audi/a4/b6-2000-2006/remont/door-locks-anti-theft-systems/#body-exterior-cabriolet) for BODY EXTERIOR - CABRIOLET .

Start diagnosis

1. Remove the right front wheel.
2. Remove the right front wheel housing liner.

Scheme 600

1. Disconnect the Leak Detection Pump (LDP) V144 electrical harness connector - 3 -.

Checking internal resistance

Scheme 601

1. Using a Multimeter , check the Leak Detection Pump (LDP) V144 for resistance as follows

If any of the specifications are not obtained

1. Replace the Leak Detection Pump (LDP) -V144-. Refer to «20 - FUEL SUPPLY SYSTEM»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-system) .

If the specified values are obtained

Checking voltage supply

Note. The voltage for the Leak Detection Pump (LDP) -V144- is supplied by the Fuel Pump (FP) Relay J17.

Scheme 602

1. Using a Multimeter , check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 3 for voltage.

1. Operate the starter briefly.

Specified value: battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Using a Multimeter , check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 3 to the Fuel Pump (FP) Relay J17 socket 2 for resistance.

Specified value: 1.5 ohms max

If the specification was not obtained

1. Check the wiring for a short circuit to Battery positive (+) or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a Multimeter , check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 1 to Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 80 for resistance.

1. Using a Multimeter , check the Leak Detection Pump (LDP) -V144- electrical harness connector terminal 2 to Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 25 for resistance.

Specified value: 1.5 ohms max.

If the specification is not obtained

1. Check the wiring for a short circuit to Battery positive (+), Ground (GND) or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Electronic Engine Power Control

The following table provides quick links to all chapters in this section.

> Electronic Power Control System

> Throttle Position Sensor G79 and Accelerator Pedal Position Sensor 2 G185, Checking

Electronic Power Control System

For "EPC" , the throttle valve is not operated by a cable from the accelerator pedal. There is no mechanical connection between the accelerator pedal and the throttle valve.

The position of the accelerator pedal is communicated to Motronic Engine Control Module (ECM) J220 by Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 (variable resistances; stored in one housing) that are connected with the accelerator pedal.

The accelerator pedal position (drivers intention) is a main input unit for the Motronic Engine Control Module (ECM) J220.

Operation of the throttle valve occurs by an electric motor in the Throttle Valve Control Module J338. This is true across the entire engine speed and engine load spectrum.

Throttle valve is operated by Accelerator Pedal Position Sensor 2 G185 according to specifications of Motronic Engine Control Module (ECM) J220.

With engine off and ignition switched on, Motronic Engine Control Module (ECM) J220 controls the Throttle Valve Control Module J338 exactly according to specifications of Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. This means, if the accelerator pedal is depressed half way, the Accelerator Pedal Position Sensor 2 G185 opens the throttle valve to the same degree; i.e. throttle valve is then opened approx. half way.

With engine running (under load), Motronic Engine Control Module (ECM) J220 can open or close the throttle valve independently of Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185.

This means, for example, that the throttle valve could be fully opened even though the accelerator pedal has only been depressed half way. This has the advantage of preventing torque losses at the throttle valve.

In addition to this, it results in significantly better values relative to emissions and consumption under certain load conditions.

It would be incorrect to think that "EPC" consists of only one or two components. "EPC" is much more of a system containing all components that contribute to recognizing, controlling and monitoring the position of the throttle valve.

1. Observe Safety Precautions.
2. Observe Clean Working Conditions.

Throttle Position Sensor G79 and Accelerator Pedal Position Sensor 2 G185, Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram

Test requirement

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.

Note. Sensors are contained within one housing. Use only gold-plated terminals when servicing the electrical harness connector terminals in Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Scheme 603

1. Release the tabs - arrows - and remove the steering column cover.

Start diagnosis

Scheme 604

1. Disconnect the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 electrical harness connector - 2 -.

Checking voltage supply and wiring

1. Switch the ignition on.

Scheme 605

1. Using a Multimeter , check the following wiring connections for voltage.

1. Switch the ignition off.

If the specification is not obtained

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical connector for resistance.

Specified value: 1.5 ohms max.

If the specification is not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. sensors are contained within one housing.

If no malfunction is detected in the wiring and if the voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Fuel Injection System, Servicing

The following table provides quick links to all chapters in this article.

For all Motronic fuel injection system component locations. Refer to 24 MULTIPORT FUEL INJECTION (MFI) .

For all Motronic fuel injection system removal/installation procedures and torque specifications. Refer to 24 MULTIPORT FUEL INJECTION (MFI) .

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool. The manufacturers test box Test Box 105 Pin VAG1598/31 is available for purchase or rental.

> Safety Precautions

> Clean Working Conditions

> Technical Data

To reduce the risk of personal injury and/or damage to the fuel injection and ignition system. Note the following

1. Always switch off ignition before disconnecting or connecting lines of the fuel injection and ignition system, including test leads.
2. During some of the tests, a Diagnostic Trouble Code (DTC) may be recognized and stored by the control module. At the end of all tests and repairs, the DTC memory should be checked and, if necessary, erased. After erasing the DTC memory, a readiness code must be generated for the engine control module.
3. Always switch ignition off before cleaning engine.

Observe the following if test and measuring instruments are required during a test drive

Even minor contaminations can lead to malfunctions in the fuel injection system. When working on the fuel supply/injection system, pay careful attention to the following rules for cleanliness

1. Thoroughly clean all unions and adjacent areas with engine or brake cleaner and dry before disconnecting.
2. Plug open lines and connections immediately with appropriate protective caps.
3. Place removed parts on a clean surface and cover. Use lint-free cloths.
4. Install clean components: Remove replacement parts immediately prior to installation. Do not use parts that have been stored unpacked (e.g. in tool boxes etc.).

1. When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely necessary.
2. Separated electrical connectors: Protect from dirt and moisture. Make sure connections are dry when reconnecting.

Technical Data

Components, Checking

The following table provides quick links to all chapters in this section.

> Oxygen Sensor (O2S) Heater before Catalytic Converter, Checking

> Oxygen Sensor Heater behind Three Way Catalytic Converter (TWC) , Checking

> Mass Air Flow (MAF) Sensor G70 , Checking

> Throttle Valve Control Module J338 , Checking

> Engine Coolant Temperature (ECT) Sensor G62 , Checking

> Engine Coolant Temperature (ECT) Gauge Sensor G2 , Checking

> Engine Speed (RPM) Sensor G28 , Checking

> Intake Manifold Tuning (IMT) Valve N156 , Checking

> Fuel Injector , Checking

Oxygen Sensor (O2S) Heater Z19 , Checking

Note. Oxygen Sensor (O2S) Heater Z19 is part of Heated Oxygen Sensor (HO2S) G39 and cannot be replaced separately. When servicing electrical harness connector terminals for the Heated Oxygen Sensor (HO2S) , use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse (on fuse panel) S243 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Remove the engine cover with air filter. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

Checking internal resistance

Scheme 606

1. Disconnect the Heated Oxygen Sensor (HO2S) G39 electrical harness connector - 2 -.

Scheme 607

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) terminals 3 to 4 for an open circuit.

Specified value: 2.5 to 10.0 ohms (at approx. 20°C)

If the specification was not obtained

1. Replace the Heated Oxygen Sensor (HO2S) G39.

If the specification was obtained

Checking voltage supply

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) electrical harness connector terminal 4 to ground (GND) for voltage.

Scheme 608

1. Turn key on.

Specified value: Battery voltage.

If the specification was not obtained

1. Check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector terminal 3 to the Fuel Pump (FP) Relay J17 socket 23/87 for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specification was obtained

Checking Ground (GND) activation

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Oxygen Sensor (O2S) 2 Heater Z28 , Checking

Note. Oxygen Sensor (O2S) 2 Heater Z28 is part of Heated Oxygen Sensor (HO2S) 2 G108 and cannot be replaced separately. When servicing electrical harness connector terminals for the Heated Oxygen Sensor (HO2S) , use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse (on fuse panel) S243 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Remove the engine cover with air filter. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

Checking internal resistance

1. Disconnect the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector - 1 -.

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) 2 G108 terminals 3 to 4 for resistance.

Specified value: 2.5 to 10.0 ohms (at approx. 20°C)

If the specification was not obtained

1. Replace the Heated Oxygen Sensor (HO2S) 2 G108. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specification was obtained

Checking voltage supply

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector terminal 4 to ground (GND) for voltage.

1. Turn key on.

Specified value: Battery voltage.

If the specification was not obtained

1. Check the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector terminal 3 to the Fuel Pump (FP) Relay J17 socket 23/87 an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specification was obtained

Checking Ground (GND) activation

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater Z29 , Checking

Note. Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater Z29 is part of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 and cannot be replaced separately. When servicing electrical harness connector terminals for the Heated Oxygen Sensor (HO2S) , use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse (on fuse panel) S243 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 609

1. Remove the retaining screws - 1 and 2 - and the cover.

Checking internal resistance

Scheme 610

1. Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector - 1 -.

Scheme 611

1. Using a multimeter , check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 terminals 1 to 2 for resistance.

Specified value: 1.0 to 20.0 ohms (at approx. 20°C)

If the specification was not obtained

1. Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specification was obtained

Checking voltage supply

1. Using a multimeter , check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminal 1 to ground (GND) for voltage.

Scheme 612

1. Turn the key on.

Specified value: Battery voltage.

If the specification was not obtained

1. Check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminal 1 to the Fuel Pump (FP) Relay J17 socket 23/87 an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specification was obtained

Checking Ground (GND) activation

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a multimeter , check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Oxygen Sensor (O2S) 2 (behind Three Way Catalytic Converter (TWC)) Heater Z30 , checking

Note. Oxygen Sensor (O2S) 2 (behind Three Way Catalytic Converter (TWC)) Heater Z30 is part of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 and cannot be replaced separately. When servicing electrical harness connector terminals for the Heated Oxygen Sensor (HO2S) , use only gold-plated terminals.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse (on fuse panel) S243 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Remove the retaining screws - 1 and 2 - and the cover.

Checking internal resistance

1. Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector - 2 -.

1. Using a multimeter , check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 terminals 1 to 2 for resistance.

Specified value: 1.0 to 20.0 ohms (at approx. 20°C)

If the specification was not obtained

1. Replace the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specification was obtained

Checking voltage supply

1. Using a multimeter , check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector terminal 1 to ground (GND) for voltage.

1. Turn the key on.

Specified value: Battery voltage.

If the specification was not obtained

1. Check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminal 1 to the Fuel Pump (FP) Relay J17 socket 23/87 an open circuit, a short circuit to each other, Battery (+), or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specification was obtained

Checking Ground (GND) activation

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a multimeter , check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Mass Air Flow (MAF) Sensor G70 , Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) Sensor G70.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse (on fuse panel) S243 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Coolant Temperature at least 80°C.

1. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Connect the scan tool.
2. Start engine and let it run at idle.
3. Using the scan tool, Check the air flow quantity of the Mass Air Flow (MAF) Sensor G70 at idle

1. End diagnosis and switch ignition off.

If the specified value was obtained, but the DTC memory has a DTC concerning the Mass Air Flow (MAF) Sensor G70

1. Check the voltage supply of the Mass Air Flow (MAF) Sensor G70.

If specified value was not obtained

1. Check the wiring of the Mass Air Flow (MAF) Sensor G70.

Checking voltage supply

Scheme 613

1. Disconnect the Mass Air Flow (MAF) Sensor G70 electrical harness connector - 1 -.
2. Start the engine and let it run at idle.

Scheme 614

1. Using a multimeter , check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminal 2 to engine Ground (GND).

Specified value: battery voltage.

1. Switch the ignition off.

If specified value was not obtained

1. Check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminal 2 to the Fuel Pump (FP) 2 Relay J49 terminal 2/87 for an open circuit, a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

Checking electrical circuit

If the manufacturers test box is being used, perform the following step.

1. Install the Test Box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a multimeter , check the Mass Air Flow (MAF) Sensor G70 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and if the voltage supply was OK

1. Replace Mass Air Flow (MAF) Sensor G70. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Throttle Valve Control Module J338 , Checking

Note. Use only gold-plated terminals when servicing terminals in harness connector of Throttle Valve Control Module J338.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Throttle valve must not be damaged or dirty.
4. Coolant Temperature at least 80°C.

Function

Throttle valve operation occurs by an electric motor (Accelerator Pedal Position Sensor 2 G185) in Throttle Valve Control Module J338. It is operated by Motronic Engine Control Module (ECM) J220 according to specifications of Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185.

Components of Throttle Valve Control Module J338

1. Throttle Position (TP) Sensor G79
2. Accelerator Pedal Position Sensor 2 G185

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Start diagnosis

1. Connect the scan tool.
2. Switch ignition on.
3. Using the scan tool, check the throttle valve position (absolute) at idle stop

1. Slowly depress the accelerator pedal to Wide Open Throttle (WOT) stop while observing the percentage display. The percentage display must increase uniformly.
2. Using the scan tool, check the throttle valve position (absolute) at Wide Open Throttle (WOT) stop

1. End diagnosis and switch ignition off.

If the specified values are not obtained

1. Remove the air hose - arrows -.

Scheme 615

1. Disconnect the Throttle Valve Control Module J338 electrical harness connector - 3 -.

Checking internal resistance

1. Using a multimeter , check the Accelerator Pedal Position Sensor 2 G185 at the Throttle Valve Control Module J338 terminals 3 to 5 for resistance.

Specified value: 1.0 to 5.0 ohms (at 20°C)

If the specification was not obtained

1. Replace the Throttle Valve Control Module J338. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specification was obtained

1. Check the voltage supply of the Throttle Valve Control Module J338 to the Motronic Engine Control Module (ECM) J220 «Checking voltage supply and wiring»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__checking-voltage-supply-and-wiring) .

Checking voltage supply and wiring

1. Switch the ignition on.

Scheme 616

1. Using a Multimeter , check the Accelerator Pedal Position Sensor 2 G185 at the Throttle Valve Control Module J338 electrical harness connector terminals 2 to 6 for voltage.

Specified value: at least 4.5 V

1. Switch the ignition off.

If the specification was obtained

1. Replace the Throttle Valve Control Module J338. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specification was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Accelerator Pedal Position Sensor 2 G185 at Throttle Valve Control Module J338 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms max.

If the specification is not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.
3. Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If no malfunction is detected in the wiring and if the voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Engine Coolant Temperature (ECT) Sensor G62 , Checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connector of Engine Coolant Temperature (ECT) Sensor G62.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Jumper wire.
3. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.
4. Engine cold.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Connect the scan tool.
2. Switch the ignition on.
3. Using the scan tool, check the coolant temperature

If the specified value is not obtained

1. Continue test according to the following table

If the specified value was obtained

1. Start the engine and let it run at idle.

The temperature value must increase uniformly in increments of 1.0°C.

If the engine shows problems in certain temperature ranges and if the temperature does not climb uniformly, the temperature signal is intermittent.

1. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

Checking internal resistance

Scheme 617

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.

Scheme 618

1. Using a multimeter , check the Engine Coolant Temperature (ECT) Sensor G62 terminals 1 to 2 for resistance.

Use the chart below for the specified values

1. Area A: Resistance values 0 to 50°C.
2. Area B: Resistance values 50 to 100°C.

Scheme 619

Specified values

1. Range A, 30°C equals a resistance of 1.5 to 2.0 kohms
2. Range B, 80°C equals a resistance of 275 to 375ohms

If any of the specified values was not obtained

1. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

Testing if display is approx. - 40.0°C

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.
2. Using a jumper wire , connect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector terminals 1 to 2.

Scheme 620

1. Check the value indicated on the scan tool display.

If the value jumps to approx. 140.0°C

1. End diagnosis and switch the ignition off.
2. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

If indication remains at approx. -40.0°C

Testing if display approx. 140.0°C

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.

If indication jumps to approx. -40.0°C

1. End diagnosis and switch ignition off.
2. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

If indication remains at approx. 140.0°C

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Engine Coolant Temperature (ECT) Gauge Sensor G2 , Checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connector of Engine Coolant Temperature (ECT) Gauge Sensor G2.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Jumper wire.
3. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.
4. Engine cold.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Connect the scan tool.
2. Switch the ignition on.
3. Using the scan tool, check the coolant temperature

If the specified value is not obtained

1. Continue test according to the following table

If the specified value was obtained

1. Start the engine and let it run at idle.

The temperature value must increase uniformly in increments of 1.0°C.

If the engine shows problems in certain temperature ranges and if the temperature does not climb uniformly, the temperature signal is intermittent.

1. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

Checking internal resistance

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.

1. Using a multimeter , check the Engine Coolant Temperature (ECT) Sensor G62 terminals 1 to 2 for resistance.

Use the chart below for the specified values

1. Area A: Resistance values 0 to 50°C.
2. Area B: Resistance values 50 to 100°C.

Specified values

1. Range A, 30°C equals a resistance of 1.5 to 2.0 kohms
2. Range B, 80°C equals a resistance of 275 to 375ohms

If any of the specified values was not obtained

1. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

Testing if display is approx. - 40.0°C

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.
2. Using a jumper wire , connect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector terminals 1 to 2.

1. Check the value indicated on the scan tool display.

If the value jumps to approx. 140.0°C

1. End diagnosis and switch the ignition off.
2. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

If indication remains at approx. -40.0°C

Testing if display approx. 140.0°C

1. Disconnect the Engine Coolant Temperature (ECT) Sensor G62 electrical harness connector - arrow -.

If indication jumps to approx. -40.0°C

1. End diagnosis and switch ignition off.
2. Replace the Engine Coolant Temperature (ECT) Sensor G62. Refer to «19 ENGINE - COOLING SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

If indication remains at approx. 140.0°C

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Engine Coolant Temperature (ECT) Gauge Sensor G2 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Engine Speed (RPM) Sensor G28 , Checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connector of the Engine Speed (RPM) Sensor G28.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Start diagnosis

The Engine Speed (RPM) Sensor G28 detects RPM and reference marks. Without an engine speed signal, the engine will not start. If the engine speed signal fails while the engine is running, the engine will stop immediately.

Function test

1. Connect the scan tool.
2. Switch the ignition on.
3. Using the scan tool, check the engine speed

1. End diagnosis and switch ignition off.

If the specified value was not obtained

Checking internal resistance

Scheme 621

1. Disconnect the Engine Speed (RPM) Sensor G28 electrical harness connector.

Scheme 622

1. Using a multimeter , check the Engine Speed (RPM) Sensor G28 terminals 2 to 3 for resistance.

Specified value: 0.7 to 1000 kohms

1. Check Engine Speed (RPM) Sensor G28 terminals 1 to 2 and 1 to 3 for short circuits.

Specified value: infinity (infinity)

If any of the specified values are not obtained

1. Replace the Engine Speed (RPM) Sensor G28. Refer to «13 ENGINE - CRANKSHAFT, CYLINDER BLOCK»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn)

If the specified values are obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the Adapter Cable (121-pin) VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

1. Using a Multimeter , check the Engine Speed (RPM) Sensor G28 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector T121 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for an open circuit, short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Remove the Engine Speed (RPM) Sensor G28 and check the sensor wheel for proper seating, damage and run-out. Refer to «13 ENGINE - CRANKSHAFT, CYLINDER BLOCK»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

If the sensor wheel is OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End diagnosis.

Intake Manifold Tuning (IMT) Valve N156 , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse SB7 OK.
2. The Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. The parking brake engaged.
4. The battery voltage at least 12.5 V.

1. The selector lever of automatic transmission in position "P" or "N".
2. All electrical consumers switched off (radiator fan must NOT run during test).
3. A/C switched off.
4. The fuel tank at least 1 / 4 filled.

1. The ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 623

1. Disconnect the Intake Manifold Tuning (IMT) Valve N156 electrical harness connector - arrow -.

Checking internal resistance

Scheme 624

1. Using a Multimeter , check the Intake Manifold Tuning (IMT) Valve N156 terminals 1 to 2 for resistance.

Specified value: 450 to 1000 ohms.

If the specified value was not obtained

1. Replace the Intake Manifold Tuning (IMT) Valve N156.

If the specified value was obtained

Checking voltage

Crank the engine.

1. Using a Multimeter , check the Intake Manifold Tuning (IMT) Valve N156 electrical harness connector terminal 1 to ground (GND) for voltage.

Specified value: battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check the wiring from the Intake Manifold Tuning (IMT) Valve N156 electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 for a short circuit to Ground (GND), or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a multimeter , check the Intake Manifold Tuning (IMT) Valve N156 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 48 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Fuel Injector , Checking

The following test procedure is used to diagnose Fuel Injectors N30, N31, N32, N33, N83, N84.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Diode test lamp (12V).
3. Wiring diagram.

Test requirements

1. Fuel Injector Fuse OK.
2. Motronic Engine Control Module (ECM) J220 Fuse OK.
3. Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
4. Battery voltage at least 12.5 volts.

1. All electrical consumers such as, lights and rear window defroster, switched off.
2. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
3. A/C switched off.
4. Ground (GND) connections between engine/transmission/chassis OK.

1. Ignition switched off.

1. Observe Safety Precautions.
2. Observe rules for cleanliness.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 625

1. Remove the Fuel Injector electrical harness retaining screws - arrows -.

Scheme 626

1. Remove the Fuel Injector electrical harness - arrows - from the fuel rail.
2. Disconnect the Fuel Injector electrical harness connectors - 1,2,3,4,5,6 - from the Fuel Injectors.

Checking internal resistance

Scheme 627

1. Using a multimeter , check the Fuel Injector electrical terminals 1 to 2 for resistance.

Specified value: 12.0 to 20.0 ohms (at approx. 20°C)

If the specified value was not obtained

1. Replace the faulty Fuel Injector. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specified value was obtained

Checking activation

Scheme 628

1. Connect a diode test lamp (12V) to the electrical harness connector terminals 1 and 2 of the Fuel Injector to be tested.
2. Operate the starter and test the activation of the Fuel Injector.

LED should flicker.

1. Switch the ignition off.

If LED flickers

1. Replace the faulty Fuel Injector. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If LED does not flicker

Checking voltage

1. Using a Multimeter , check the Fuel Injector electrical harness connector terminal 1 to ground (GND) for voltage.
2. Operate the starter.

Specified value: Battery voltage.

If the specification is not obtained

Scheme 629

1. Check the wiring from the Fuel Injector electrical harness connector terminal 1 to the Battery (+) 1 in the interior wiring harness for a short circuit to Ground (GND), or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Fuel Injector electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification is not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Function tests

The following table provides quick links to all chapters in this section.

> Heated Oxygen Sensor (HO2S) before Catalytic Converter, Checking

> Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) , Checking

Heated Oxygen Sensor (HO2S) G39 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Heated Oxygen Sensor (HO2S) G39.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S243 OK.
2. Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Perform the function test in Diagnostic Mode 06. Refer to --> «Diagnostic Mode 06: Checking test results of components that are not continuously monitored»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-06-checking-test-results) .

If specified values are obtained

1. End diagnosis and switch the ignition off.

If the specified values are not obtained

Checking primary voltage

1. Disconnect the Heated Oxygen Sensor (HO2S) G39 electrical harness connector - 2 -.

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector terminals 1 to 5 for voltage.

Specified value: 0.400 to 0.500 V

1. Switch the ignition off.

If the specified value was not obtained

1. Replace the Heated Oxygen Sensor (HO2S) G39. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Heated Oxygen Sensor (HO2S) G39 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Heated Oxygen Sensor (HO2S) 2 G108 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Heated Oxygen Sensor (HO2S) 2 G108.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S243 OK.
2. Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Perform the function test in Diagnostic Mode 06. Refer to --> «Diagnostic Mode 06: Checking test results of components that are not continuously monitored»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-06-checking-test-results) .

If specified values are obtained

1. End diagnosis and switch the ignition off.

If the specified values are not obtained

Checking primary voltage

1. Disconnect the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector - 1 -.

1. Using a multimeter , check the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector terminals 1 to 5 for voltage.

Specified value: 0.400 to 0.500 V

1. Switch the ignition off.

If the specified value was not obtained

1. Replace the Heated Oxygen Sensor (HO2S) 2 G108. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Heated Oxygen Sensor (HO2S) 2 G108 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130.

Test requirements

1. Fuse S243 OK.
2. Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Perform the function test in Diagnostic Mode 06. Refer to --> «Diagnostic Mode 06: Checking test results of components that are not continuously monitored»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-06-checking-test-results) .

If specified values are obtained

1. End diagnosis and switch the ignition off.

If the specified values are not obtained

1. Remove the retaining screws - 1 and 2 - and the cover.

Checking primary voltage

1. Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector - 1 -.
2. Switch the ignition on.

1. Using a multimeter , check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminals 3 to 4 for voltage.

Specified value: 0.400 to 0.500 V

1. Switch the ignition off.

If the specified value was obtained

1. Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specified value was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) G130 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131.

Test requirements

1. Fuse S243 OK.
2. Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Perform the function test in Diagnostic Mode 06. Refer to --> «Diagnostic Mode 06: Checking test results of components that are not continuously monitored»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-06-checking-test-results) .

If specified values are obtained

1. End diagnosis and switch the ignition off.

If the specified values are not obtained

1. Remove the retaining screws - 1 and 2 - and the cover.

Checking primary voltage

1. Disconnect the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector - 2 -.
2. Switch the ignition on.

1. Using a multimeter , check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector terminals 3 to 4 for voltage.

Specified value: 0.400 to 0.500 V

1. Switch the ignition off.

If the specified value was obtained

1. Replace the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the specified value was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) G131 electrical harness connector terminals to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Motronic Engine Control Module (ECM) J220

The following table provides quick links to all chapters in this section.

> Function

> Voltage Supply, Checking

> Motronic Engine Control Module (ECM) J220 , Replacing

Function

Motronic Engine Control Module (ECM) J220 regulates fuel injection, Throttle Valve Control Module J338 , oxygen sensor regulation, ignition, knock control, Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 , engine speed limitation through fuel injectors or Fuel Pump (FP) Relay J17 as well as On Board Diagnostic (OBD).

Voltage Supply, Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagrams.

Test requirements

1. Fuse S132 OK.
2. Fuse S134 OK.
3. Fuse S138 OK.
4. Fuse S237 OK.

1. The Ground (GND) connections at the engine and transmission OK.
2. The battery voltage at least 12.5 V.
3. The generator OK.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

If the manufacturers test box is being used, perform the following step.

1. Install the Adapter Cable (121-pin) VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

Checking voltage supply

1. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5 V

If the specified value was not obtained

1. Check the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 23 to Motronic Engine Control Module (ECM) Power Supply Relay J271 terminal 4/86 for an open circuit or short to Ground (GND).
2. Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

1. Switch the ignition on.
2. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5 V

1. Switch the ignition off.

If the specified value was not obtained

1. Check the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 62 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 8/87 for an open circuit or short to Ground (GND).
2. Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking Ground (GND)

1. Using a Multimeter , check the following wiring connections for resistance.

Specified value: 1.5 ohms.

If any of the specified values are not obtained

1. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
2. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring and the voltage supply was OK

1. Perform a road test to verify any electrical repairs.

If the fault does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End of diagnosis.

If the fault does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Motronic Engine Control Module (ECM) J220 , Replacing

Removing

Special tools, testers and auxiliary items required

1. Heat gun.

Note. When the Motronic Engine Control Module (ECM) J220 electrical harness connectors are disconnected, the adaptation values are erased and the DTC memory content remains intact.

Work procedure

Check the identification of the previous Motronic Engine Control Module (ECM) J220 as follows

1. Connect the scan tool.
2. Switch the ignition on.
3. Using the scan tool, select "Vehicle information".
4. Select " Calibration Identification" in vehicle information.

The electronic control module identification number will be displayed, e.g. 06A906032NA 4983

1. Record the electronic control module identification number.
2. End diagnosis and switch the ignition off.

Procedure

1. Switch the ignition on.
2. Actuate the touch-wipe function to allow the wipers to move to the end position.

Note. The wiper arms will now move into the line of view on the windshield (service position).

1. Remove the wiper arms caps.

Scheme 630

1. Loosen the wiper arm nuts - arrows - several turns.
2. Loosen the wiper arms from the wiper axle by rocking slightly.

Note. Do not force wiper arms off. If the wiper arms cannot be removed, use a standard puller.

1. Remove the wiper arms nuts and the wiper arms from the wiper axles.

Scheme 631

1. Remove the rubber seal - 1 - and the plenum chamber cover - 2 -.
2. Disconnect the electrical connectors for windshield washer heating.
3. Unclip the cover - 2 - to the Motronic Engine Control Module (ECM) J220.

Scheme 632

1. Disconnect the Motronic Engine Control Module (ECM) J220 electrical harness connector - 1 - and - 3 -.

Motronic Engine Control Module (ECM) J220 installation

Installation is performed in reverse order of removal. Note the following

Motronic Engine Control Module (ECM) J220 reprogramming

1. The new Motronic Engine Control Module (ECM) J220 and immobilizer must be activated.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of procedure

Additional Signals, Checking

The following table provides quick links to all chapters in this section.

> Motronic Engine Control Module (ECM) Power Supply Relay J271 , Checking

> Fuel Pump (FP) Relay J17 , Checking

> Speed Signal, Checking

> CAN-Bus Terminal Resistance, Checking

Motronic Engine Control Module (ECM) Power Supply Relay J271 , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagrams.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Fuse S132 OK.
3. Fuse S134 OK.
4. Fuse S237 OK.

1. The Ground (GND) connections at the engine and transmission OK.
2. The battery voltage at least 12.5 V.
3. The generator OK.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5 V

If the specified value was not obtained

1. Check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/30 to the Battery A for an open circuit or short to Ground (GND).
2. Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

1. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5 V

If the specified value was not obtained

1. Check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 4/86 to Battery A (+) for an open circuit or short to Ground (GND).
2. Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking Ground (GND)

If the manufacturers test box is being used, perform the following step.

1. Install the Adapter Cable (121-pin) VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a Multimeter , check the following wiring connection for resistance.

Specified value: 1.5 ohms.

If the specified value was not obtained

1. Check the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 4/86 to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 23 for an open circuit or a short to Battery (+).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) Power Supply Relay J271.
2. Perform a road test to verify repair.

If the fault does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the fault does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End diagnosis.

Fuel Pump (FP) Relay J17 , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S132 OK.
2. Fuse S134 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, selector lever in position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Start diagnosis

1. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5 V

If the specified value was not obtained

1. Check the Fuel Pump (FP) Relay J17 socket 1 to the Battery A B (+) terminal for an open circuit or short to Ground (GND).
2. Check the electrical harness connectors for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the following wiring connection for voltage.

Specified value: 12.5. battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check for an open circuit or short to Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking Ground (GND)

1. Using a Multimeter , check the Fuel Pump (FP) Relay J17 socket 16/Mot to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 65 for resistance.

Specified value: 1.5 ohms.

If the specified value was not obtained

1. Check the Fuel Pump (FP) Relay J17 socket 16/Mot to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 65 for an open circuit or a short to Battery (+).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If no malfunctions are found in the wiring and the voltage supply was OK

1. Replace the Fuel Pump (FP) Relay J17.
2. Perform a road test to verify repair.

If the fault does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the fault does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End diagnosis.

Speed Signal, Checking

The following procedure requires a test drive. Observe all Safety Precautions.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Speedometer G21 OK.
2. The Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Connect the scan tool.
2. Perform a road test with a vehicle speed greater than 5 Km/h.
3. Using the scan tool, Check the vehicle speed

1. Compare the vehicle speed on the scan tool to the Speedometer G21.

Specified value: a difference of no greater than 10%.

If the specified value was not obtained or no speed was displayed

1. Check the wiring from the Motronic Engine Control Module (ECM) J220 to the Instrument Cluster Control Module J285 for an open circuit, Short to Battery (+), or to Ground (GND).
2. Check the wiring connection for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

CAN-Bus Terminal Resistance, Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirement

1. A CAN-Bus malfunction was recognized.
2. The Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Function

The Engine Control Module (ECM) communicates with other CAN-Bus capable control modules.

The control modules are connected by two data bus wires which are twisted together (CAN_High and CAN_Low), and exchange information (messages). Missing information on the CAN-bus is recognized as a malfunction by the Engine Control Module (ECM) and the other control modules connected to the CAN-bus.

Trouble-free operation of the CAN-Bus requires that it have a terminal resistance. This central terminal resistance is located in the Engine Control Module (ECM).

If the CAN-Bus communication is interrupted. Communication from the scan tool to the Engine Control Module (ECM) may not be possible.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the Instrument Cluster Control Module J285 Data Bus On Board Diagnostic Interface J533 electrical harness connector.

Note. The Engine Control Module (ECM) J220 must remain connected for the following step.

1. Using a Multimeter , check the Instrument Cluster Control Module J285 electrical harness connector terminals T32a13 to T32a12 for resistance.

Specified value: 60 to 72 ohms (at approx. 20°C)

If the specified value was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a Multimeter , check the Data Bus On Board Diagnostic Interface J533 electrical harness connector T32b to the Engine Control Module (ECM) J220 electrical harness connector T94 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the wiring connection for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End of diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Exhaust System Components, Removing and Installing

The following table provides quick links to all chapters in this section.

For all Exhaust System, Emission control component locations. Refer to 26 EXHAUST SYSTEM, EMISSION CONTROLS .

For all Exhaust System, Emission control removal/installation procedures and torque specifications. Refer to 26 EXHAUST SYSTEM, EMISSION CONTROLS .

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool.

> Three Way Catalytic Converter, Checking

Three Way Catalytic Converter, Checking

Test requirements

1. Battery voltage at least 12.5 volts.
2. Oxygen Sensors OK.
3. No leaks or damage to exhaust system.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Function test

1. Perform the function test in Diagnostic Mode 06. Refer to --> «Diagnostic Mode 06: Checking test results of components that are not continuously monitored»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-06-checking-test-results) .
2. End diagnosis and switch the ignition off.

If the specified values are exceeded

1. Check the exhaust system for leaks.
2. If necessary, repair the leak in the exhaust system.
3. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
4. Perform a road test to verify Repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If no leaks are found in the exhaust system

1. Replace the catalytic converter including front exhaust pipe. Refer to «26 EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

Final procedures

After the Repair work, the following work steps must be performed in the following sequence

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Secondary Air Injection (AIR) System

The following table provides quick links to all chapters in this section.

> Principle and Function

> Combination Valve for Secondary Air Injection (AIR), Checking Function

> Secondary Air Injection (AIR) Solenoid Valve -N112- , Checking

> Secondary Air Injection (AIR) Pump Relay J299 , Checking

> Secondary Air Injection (AIR) Pump Motor V101 , Checking

Principle and Function

Principle

Due to the rich mixture during the cold start phase, the exhaust emissions contain an increased level of unburned hydrocarbons. The Secondary Air Injection (AIR) system improves the secondary oxidation within the catalytic converter, thereby reducing harmful emissions. The heat released by secondary oxidation shortens the startup time of the catalytic converter considerably, as well as significantly improves emissions quality during the cold-running phase.

Function

1. During cold start (with coolant temperatures +15 to +35°C), the Secondary Air Injection (AIR) system blows air behind the exhaust valve for approx. 65 Sec. This produces an oxygen rich exhaust gas, causes the after burning and reduces the heating-up phase of the catalytic converter.
2. In addition, the Secondary Air Injection (AIR) system is switched on with a delay of approx. 20 Sec during idle for 5 Sec after every subsequent engine start up to max. 80°C coolant temperature and is checked by On Board Diagnostic (OBD).

Combination Valve for Secondary Air Injection (AIR), Checking Function

The following procedure is used to test all combination valves.

Special tools, testers and auxiliary items required

1. Hand vacuum pump

Test conditions

1. Vacuum lines and hose connections free of leaks.
2. Vacuum lines not plugged.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Remove the vacuum hose from the combination valve.

Scheme 633

1. Connect the hand vacuum pump to combination valve vacuum connection.

Scheme 634

1. Disconnect the Secondary Air Injection hose - arrow -.
2. Inject a light air pressure into the in Secondary Air Injection hose to close the combination valve. (do not use compressed air).

1. The combination valve should close and seal. Air should not be able to pass through the combination valve.

1. Operate the hand vacuum pump.

1. The combination valve should open. Air should be able to pass through the combination valve.

If combination valve does not open

1. Replace the faulty combination valve. Refer to «26 EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .

End of procedure.

Secondary Air Injection (AIR) Solenoid Valve -N112- , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S73 OK.
2. The ignition switched off.

Note. Voltage for the Secondary Air Injection (AIR) Solenoid Valve -N112- is supplied by the Fuel Pump (FP) Relay J17.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical harness connector.

Checking internal resistance

Scheme 635

1. Using a Multimeter , check the Secondary Air Injection (AIR) Solenoid Valve -N112- terminals 1 and 2 for resistance.

Specified value: 25 to 35 ohms.

If the specified value is not obtained

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

If the specification is obtained

Checking voltage supply

Scheme 636

1. Using a Multimeter , check the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical harness connector terminal 1 to Ground (GND) for voltage.

1. Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the wiring connection from the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical harness connector terminal 1 to Fuel Pump Relay J17 socket 30/87F for an open circuit or a short to Battery positive (+).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If the specified value was obtained

Check Ground (GND) activation

1. Using a Multimeter , check the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical harness connector terminal 2 to Battery (+) for voltage.

1. Operate the starter briefly.

Specified value: battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check the wiring connection from the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 44 for an open circuit or a short to Battery positive (+).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a Multimeter , check the Secondary Air Injection (AIR) Solenoid Valve -N112- electrical connector terminal 2 to Motronic Engine Control Module (ECM) J220 electrical connector terminal 44 for an open circuit.

Specified value: 1.5 ohms max.

If the specification is not obtained

1. Check the wiring for a short circuit to each other, to Battery positive (+), Ground (GND) or an open circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the wiring connection.
4. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .

1. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End diagnosis.

Secondary Air Injection (AIR) Pump Relay J299 , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse S131 OK.
2. Fuse S234 OK.
3. Fuel Pump (FP) Relay J17 OK.
4. Battery voltage at least 12.5 V.

1. All electrical consumers switched off (radiator fan must NOT run during test).
2. A/C switched off.
3. The ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Remove the Secondary Air Injection (AIR) Pump Relay J299.

Checking voltage

1. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay J299 socket 8/87 to Ground (GND).

Specified value: battery voltage.

If the specified value was not obtained

1. Check the Secondary Air Injection (AIR) Pump Relay J299 socket 8/87 to Battery A (+) for an open circuit or a short circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

1. Switch the ignition on.
2. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay J299 socket 2/30 to Ground (GND) for voltage.

Specified value: battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check the Secondary Air Injection (AIR) Pump Relay J299 socket 4/86 to the Fuel Pump (FP) Relay J17 socket 2 for an open circuit or a short circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Relay J299 socket 6/T to the Motronic Engine Control Module (ECM) J220 electrical harness connector terminal 46 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Secondary Air Injection (AIR) Pump Relay J299.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Secondary Air Injection (AIR) Pump Motor V101 , Checking

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Secondary Air Injection (AIR) Pump Relay J299 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 V.
4. All electrical consumers switched off (radiator fan must NOT run during test).

1. A/C switched off.
2. The ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the secondary air injection hose - arrow -.

Scheme 637

1. Remove the center noise insulation fasteners - 1, 2, 3, 4 - and the center noise insulation panel.

Scheme 638

1. Disconnect the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector - 3 -.

Checking voltage

1. Start engine momentarily.

1. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminals 1 to 2 for voltage.
2. Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

1. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 2 to Ground (GND).

Specified value: battery voltage.

If the specified value was not obtained

1. Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay J299 socket 2/30 to the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 2 for an open circuit or a short circuit.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking Ground (GND)

1. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 1 to Ground (GND) connection 2 (on left front long member) for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 1 to Ground (GND) connection 2 (on left front long member) for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace Secondary Air Injection (AIR) Pump Motor V101. Refer to «26 EXHAUST SYSTEM, EMISSION CONTROLS»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-mechanical-engine-codes-avk-bgn) .
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK

1. Replace the Secondary Air Injection (AIR) Pump Relay J299.
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Ignition, Servicing

The following table provides quick links to all chapters in this section.

> General Information

> Safety Precautions

> Test Data, Spark Plugs

> Camshaft Position (CMP) Sensor , Checking

> Camshaft Adjustment Valve , Checking

> Knock Sensor (KS) , Checking

> Ignition Coils with Power Output Stage , Checking

General Information

For all Ignition/Glow plug system component locations. Refer to 28 IGNITION/GLOW PLUG SYSTEM .

For all Ignition/Glow plug system removal/installation procedures and torque specifications. Refer to 28 IGNITION/GLOW PLUG SYSTEM .

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool. The manufacturers test box Test Box 105 Pin VAG1598/31 is available for purchase or rental.

Test Data, Spark Plugs

Camshaft Position (CMP) Sensor G40 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor G40.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 639

1. Disconnect the Camshaft Position (CMP) Sensor G40 electrical harness connector - 1 -.
2. Switch the ignition on.

Scheme 640

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor G40 electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

1. Switch the ignition off.

If the specification was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

Scheme 641

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor G40 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connections for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Position (CMP) Sensor G40.

If no malfunction is found in the wiring and voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Position (CMP) Sensor 2 G163 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor 2 G163.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 642

1. Disconnect the Camshaft Position (CMP) Sensor 2 G163 electrical harness connector - 2 -.
2. Switch the ignition on.

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 2 G163 electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

1. Switch the ignition off.

If the specification was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 2 G163 electrical harness connector to the Engine Control Module (ECM) electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Position (CMP) Sensor 2 G163.

If no malfunction is found in the wiring and voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Position (CMP) Sensor 3 G300 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor 3 G300.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the Camshaft Position (CMP) Sensor 3 G300 electrical harness connector - 2 -.
2. Switch the ignition on.

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 3 G300 electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

1. Switch the ignition off.

If the specification was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 3 G300 electrical harness connector to the Engine Control Module (ECM) electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Position (CMP) Sensor 3 G300.

If no malfunction is found in the wiring and voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Position (CMP) Sensor 4 G301 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor 4 G301.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Battery voltage at least 12.5 volts.
3. All electrical consumers such as, lights and rear window defroster, switched off.
4. Vehicles with automatic transmission, shift selector lever into position "P" or "N".

1. A/C switched off.
2. Ground (GND) connections between engine/transmission/chassis OK.
3. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect the Camshaft Position (CMP) Sensor 4 G301 electrical harness connector - 2 -.
2. Switch the ignition on.

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 4 G301 electrical harness connector terminals 1 to 3 for voltage.

Specified value: about 5.0 V

1. Switch the ignition off.

If the specification was not obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Position (CMP) Sensor 4 G301 electrical harness connector to the Engine Control Module (ECM) electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Position (CMP) Sensor 4 G301.

If no malfunction is found in the wiring and voltage supply was not OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Adjustment Valve 1 N205 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 1 N205.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Motronic Engine Control Module (ECM) J220 Fuses OK.
2. ] Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 643

1. Disconnect Camshaft Adjustment Valve 1 N205 electrical harness connector - 3 -.

1. Using a Multimeter , check the Camshaft Adjustment Valve 1 N205 electrical terminals 1 to 2 for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20°C)

If the specified value was not obtained

1. Replace the Camshaft Adjustment Valve 1 N205.

If the specified value was obtained

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 2 to Ground (GND) for voltage.
3. Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 5/87A for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Adjustment Valve 1 N205.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Adjustment Valve 2 N208 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 2 N208.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Motronic Engine Control Module (ECM) J220 Fuses OK.
2. ] Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect Camshaft Adjustment Valve 2 N208 electrical harness connector - 4 -.

1. Using a Multimeter , check the Camshaft Adjustment Valve 2 N208 electrical terminals 1 to 2 for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20°C)

If the specified value was not obtained

1. Replace the Camshaft Adjustment Valve 2 N208.

If the specified value was obtained

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the Camshaft Adjustment Valve 2 N208 electrical harness connector terminal 2 to Ground (GND) for voltage.
3. Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the Camshaft Adjustment Valve 2 N208 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 5/87A for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Adjustment Valve 2 N208 electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Adjustment Valve 2 N208.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Adjustment Valve 1 (exhaust) N318 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 1 (exhaust) N318.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse SB7 OK.
2. ] Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect Camshaft Adjustment Valve 1 (exhaust) N318 electrical harness connector - 3 -.

1. Using a Multimeter , check the Camshaft Adjustment Valve 1 (exhaust) N318 electrical terminals 3 to 2 for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20°C)

If the specified value was not obtained

1. Replace the Camshaft Adjustment Valve 1 (exhaust) N318.

If the specified value was obtained

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the Camshaft Adjustment Valve 1 (exhaust) N318 electrical harness connector terminal 2 to Ground (GND) for voltage.
3. Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the Camshaft Adjustment Valve 1 (exhaust) N318 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 2/87 for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Adjustment Valve 1 (exhaust) N318 electrical harness connector terminal 3 to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Adjustment Valve 1 (exhaust) N318.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Camshaft Adjustment Valve 2 (exhaust) N319 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 2 (exhaust) N319.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse SB7 OK.
2. Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

1. Disconnect Camshaft Adjustment Valve 2 (exhaust) N319 electrical harness connector - 4 -.

1. Using a Multimeter , check the Camshaft Adjustment Valve 2 (exhaust) N319 electrical terminals 3 to 2 for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20°C)

If the specified value was not obtained

1. Replace the Camshaft Adjustment Valve 2 (exhaust) N319.

If the specified value was obtained

Checking voltage

1. Switch the ignition on.
2. Using a Multimeter , check the Camshaft Adjustment Valve 2 (exhaust) N319 electrical harness connector terminal 2 to Ground (GND) for voltage.
3. Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

1. Check the Camshaft Adjustment Valve 2 (exhaust) N319 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 5/87A for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Camshaft Adjustment Valve 2 (exhaust) N319 electrical harness connector terminal 3 to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK

1. Replace the Camshaft Adjustment Valve 2 (exhaust) N319.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis.

Knock Sensor (KS) 1 G61 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Knock Sensor (KS) 1 G61.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The mounting bolt of Knock Sensor (KS) 1 G61 tightened to 20 Nm.
2. The Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 644

1. Disconnect the Knock Sensor (KS) 1 G61 electrical harness connector - 2 -.

Checking internal resistance

Scheme 645

1. Using a Multimeter , check the Knock Sensor (KS) 1 G61 terminals 1 to 2 for an internal short.

Specified value: infinity (Infinity).

If the specified value was not obtained

1. Replace Knock Sensor (KS) 1 G61.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

Scheme 646

1. Using a Multimeter , Check the Knock Sensor (KS) 1 G61 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace Knock Sensor (KS) 1 G61.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Knock Sensor (KS) 2 G66 , checking

Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Knock Sensor (KS) 2 G66.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The mounting bolt of Knock Sensor (KS) 2 G66 tightened to 20 Nm.
2. The Motronic Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.

1. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
2. A/C switched off.
3. Ground (GND) connections between engine/transmission/chassis OK.
4. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 647

1. Disconnect the Knock Sensor (KS) 2 G66 electrical harness connector - arrow -.

Checking internal resistance

1. Using a Multimeter , check the Knock Sensor (KS) 2 G66 terminals 1 to 2 for an internal short.

Specified value: infinity (Infinity).

If the specified value was not obtained

1. Replace the Knock Sensor (KS) 2 G66.

If the specified value was obtained

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Knock Sensor (KS) 2 G66 electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace Knock Sensor (KS) 2 G66.
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

Ignition Coils with Power Output Stage , Checking

The following procedure is used to diagnose Ignition Coils with Power Output Stage N70, N127, N291, N292, N323, N324.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Diode test lamp.
3. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) J220 fuses OK.
2. Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
3. Engine Speed (RPM) Sensor G28 OK.
4. Camshaft Position (CMP) Sensor G40 OK.

1. Battery voltage at least 12.5 volts.
2. All electrical consumers such as, lights and rear window defroster, switched off.
3. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
4. A/C switched off.

1. Ground (GND) connections between engine/transmission/chassis OK.
2. Ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check) .

Start diagnosis

Scheme 648

1. Disconnect the Ignition Coils with Power Output Stage electrical harness connectors - 1 through 6 - from the Ignition Coils with Power Output Stage.

Checking voltage supply

1. Switch the ignition on.

1. Using a Multimeter , check the Ignition Coil electrical harness connector terminals 1 to 4 for voltage.

Specified value: battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check the Ignition Coil electrical harness connector terminal 1 to battery (+) connection 1 for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified values were obtained

Checking activation

1. Disable the power supply to the Fuel Injectors by removing Fuse SB6.

1. Using a diode test lamp , check the Ignition Coil electrical harness connector terminals 2 to 3 for voltage.
2. Operate the starter.

The LED should flicker.

1. Switch the ignition off.

If the LED flickers and the voltage was OK

1. Replace the faulty Ignition Coils with Power Output Stage. Refer to «28 IGNITION/GLOW PLUG SYSTEM»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the LED does not flicker

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the test box VAG1598/31. Refer to «24 MULTIPORT FUEL INJECTION (MFI)»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-6-cyl-5v-engine-controls-fuel-injection-ignition-engine-codes-avk-bgn) .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .

1. Using a Multimeter , Check the Ignition Coil electrical harness connector to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
2. Check the wiring connection for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified values were obtained

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Motronic Engine Control Module (ECM) J220. Refer to --> «Motronic Engine Control Module (ECM) J220 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__motronic-engine-control-module-ecm-j220) .
2. Assembly is performed in the reverse of the removal.

Final procedures

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

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

End of diagnosis

5 Spd. Automatic Transmission 01V Front and All Wheel Drive, Checking

The following table provides quick links to all chapters in this section.

For all Automatic Transmission- Gears, Hydraulic controls component locations. Refer to

1. «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V
2. «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING

Component locations.

For all Automatic Transmission- Gears, Hydraulic controls removal/installation procedures and torque specifications. Refer to

1. «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V
2. «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING

Removal and Installation procedures.

Check the Technical Bulletins for information that may supersede any information included in this article.

Note. All manufacturers special tools as well as common tools may contain a manufacturer specific part number. These tools may be substituted with an equivalent aftermarket tool or are available for purchase through Audi. Manufacturers special tools as well as common tools that contain a manufacturer specific part number may be referenced in the test procedure illustrations showing the tool use or installation. If the manufacturer specific tool is not being used, an equivalent aftermarket tool may be installed in the same manner as the manufacturers special tool. The manufacturers test box Test Box 105 Pin VAG1598/31 is available for purchase or rental. Certainly you have received an electrical shock once before when touching something made out of metal. The reason for this is the electrostatic charge of the human body. This charge can lead to functional problems by touching the electrical components of the transmission and selector lever mechanism. Touch a grounded object, e.g. a water pipe or a hoist, before working on the electrical components! Do not make direct contact on electrical harness connector terminals! If special testing equipment is required during road test, note the following

Safety precautions

> Multi-Function Transmission Range (TR) Switch F125 , Checking

> Tiptronic Switch F189 , Checking

> Transmission Fluid Temperature Sensor G93 , Checking

> Transmission Input Speed (RPM) Sensor G182 , Checking

> Transmission Output Speed (RPM) Sensor G195 , Checking

> Solenoid Valves in Valve Body , Checking

Multi-Function Transmission Range (TR) Switch F125 , Checking

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. Fuse S231 OK.
2. The Control Module with indicator unit in the Instrument Cluster Control Module J285 must be OK.
3. The selector lever cable adjustment OK.
4. The battery voltage must be at least 12.5 Volts.

1. All electrical consumers must be switched off.
2. The parking brake must be engaged.
3. The selector lever must be in the "P" position.
4. The Ground (GND) connections to transmission must be OK.

Procedure

1. Switch the ignition on.
2. Depress the brake pedal and maintain depressed.
3. Shift the selector lever into all positions.

The selector lever position must correspond with the Tiptronic Switch F189 indicator display unit.

1. Switch the ignition off.

If the selector lever position does not correspond with the Tiptronic Switch F189 indicator display unit

Scheme 649

1. Disconnect the Multi-Function Transmission Range (TR) Switch F125 electrical harness connector - 1 -.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking voltage

1. Switch the ignition on.
2. Using a multimeter , check the Multi-Function Transmission Range (TR) Switch F125 electrical harness connector terminal 7/B to Ground (GND) for voltage.

Specified value, Battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. Check the wiring from the Multi-Function Transmission Range (TR) Switch F125 electrical harness connector terminal 7/B to the Ignition/starter switch for an open circuit, short to ground (GND) or a short to Battery (+).
2. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking Ground (GND)

1. Using a multimeter , check the Multi-Function Transmission Range (TR) Switch F125 electrical harness connector terminal 10/31 to Ground (GND) connection for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was OK

Checking wiring

If the manufacturers test box is being used. Perform the following step.

Test Box 105 Pin VAG1598/31

If the manufacturers test box is not being used. Perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Scheme 650

1. Using a multimeter , check the Multi-Function Transmission Range (TR) Switch F125 electrical harness connector terminals to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was not OK

1. Replace the Multi-Function Transmission Range (TR) Switch F125. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE , Multi-Function Transmission Range (TR) Switch F125 , Removing and Replacing.

If no malfunction is found in the wiring and the resistance was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Tiptronic Switch F189 , Checking

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. Fuse S231 OK.
2. The Control Module with indicator unit in the Instrument Cluster Control Module J285 must be OK.
3. The selector lever cable adjustment OK.
4. The battery voltage must be at least 12.5 Volts.

1. All electrical consumers must be switched off.
2. The parking brake must be engaged.
3. The selector lever must be in the "P" position.
4. The Ground (GND) connections to transmission must be OK.

Procedure

1. Switch the ignition on.
2. Depress the brake pedal and maintain depressed.
3. Shift the selector lever into all positions.

The selector lever position must correspond with the Tiptronic Switch F189 indicator display unit.

1. Switch the ignition off.

If the selector lever position does not correspond with the Tiptronic Switch F189 indicator display unit

1. Disconnect the Tiptronic Switch F189 electrical harness connector - 1 -.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking voltage

1. Switch the ignition on.
2. Using a multimeter , check the Tiptronic Switch F189 electrical harness connector terminal T10/7 to Ground (GND) for voltage.

Specified value, Battery voltage.

1. Switch the ignition off.

If the specified value was not obtained

1. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking Ground (GND)

1. Using a multimeter , check the Tiptronic Switch F189 electrical harness connector terminal 10/31 to Ground (GND) connection for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was OK

Checking wiring

If the manufacturers test box is being used, perform the following step.

Test Box 105 Pin VAG1598/31

If the manufacturers test box is not being used, perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

1. Using a multimeter , check the Tiptronic Switch F189 electrical harness connector terminals to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was not OK

1. Replace the Tiptronic Switch F189. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE , Tiptronic Switch F189 , Removing and Replacing.

If no malfunction is found in the wiring and the resistance was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Transmission Fluid Temperature Sensor G93 , Checking

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. The Transmission Fluid Temperature Sensor G93 fuse OK.
2. The battery voltage must be at least 12.5 Volts.
3. All electrical consumers must be switched off.
4. The parking brake must be engaged.

1. The selector lever must be in the "P" position.
2. The Ground (GND) connections to transmission must be OK.

Procedure

Scheme 651

1. Disconnect the Transmission Fluid Temperature Sensor G93 electrical harness connector.
2. Check the electrical harness connector for damage, corrosion, lose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking resistance

Scheme 652

1. Using a multimeter , check the Transmission Fluid Temperature Sensor G93 terminals 10 to 12 for resistance.

If any of the specified values are not obtained

1. Replace the Transmission Fluid Temperature Sensor G93. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) , Removing and Replacing

If the specified values are obtained

Checking wiring

If the manufacturers test box is being used. Perform the following step.

Test Box 105 Pin VAG1598/31

If the manufacturers test box is not being used. Perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

1. Using a multimeter , check the Transmission Fluid Temperature Sensor G93 electrical harness connector terminals to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace the Transmission Fluid Temperature Sensor G93. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) , Removing and Replacing

If no malfunction is found in the wiring and the resistance was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Transmission Input Speed (RPM) Sensor G182 , Checking

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. The Transmission Input Speed (RPM) Sensor G182 fuse OK.
2. The battery voltage must be at least 12.5 Volts.
3. All electrical consumers must be switched off.
4. The parking brake must be engaged.

1. The elector lever must be in the "P" position.
2. The Ground (GND) connections to transmission must be OK.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

Scheme 653

1. Disconnect the Transmission Input Speed (RPM) Sensor G182 electrical harness connector - 1 -.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the Adapter F/VAG1598 (68 Pin) VAG1598/22. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Scheme 654

1. Using a multimeter , check the Transmission Input Speed (RPM) Sensor G182 electrical harness connector terminals T16 to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace the Transmission Input Speed (RPM) Sensor G182. Refer to --> «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE .

If no malfunction is found in the wiring and the resistance was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code Description .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Transmission Output Speed (RPM) Sensor G195 , Checking

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. The Transmission Output Speed (RPM) Sensor G195 fuse OK.
2. The battery voltage must be at least 12.5 Volts.
3. All electrical consumers must be switched off.
4. The parking brake must be engaged.

1. The elector lever must be in the "P" position.
2. The Ground (GND) connections to transmission must be OK.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «Preliminary Check»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__preliminary-check)

1. Disconnect the Transmission Output Speed (RPM) Sensor G195 electrical harness connector - 1 -.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking wiring

If the manufacturers test box is being used, perform the following step.

1. Install the Adapter F/VAG1598 (68 Pin) VAG1598/22. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

1. Using a multimeter , check the Transmission Output Speed (RPM) Sensor G195 electrical harness connector T 16 terminals to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace the Transmission Output Speed (RPM) Sensor G195. For all Automatic Transmission system removal/installation procedures and torque specifications. Refer to --> «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE ..

If no malfunction is found in the wiring and the resistance was OK

1. Erase the DTC memory. Refer to --> «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic)
2. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE ..

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Solenoid Valves in Valve Body , Checking

This procedure is used to diagnose all Solenoid Valves in the valve body.

Special tools, testers and auxiliary items required

1. Multimeter
2. Wiring diagram

Requirements

1. The Solenoid Valve fuses OK.
2. The battery voltage must be at least 12.5 Volts.
3. All electrical consumers must be switched off.
4. The parking brake must be engaged.

1. The elector lever must be in the "P" position.
2. The Ground (GND) connections to transmission must be OK.

Procedure

1. Disconnect the Solenoid Valve electrical harness connector.
2. Check the electrical harness connector for damage, corrosion, lose or broken terminals.
3. Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK

1. Repair the malfunction.

If the electrical harness connector is OK

Checking resistance

1. Using a multimeter , check the Solenoid Valve electrical harness connector terminals at the Solenoid Valve electrical harness connector for resistance.

If any of the specified values are not obtained

1. Replace the faulty Solenoid Valve/Regulating Valve. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) , Removing and Replacing.

If the specified values are obtained

Checking wiring

1. Install the Adapter F/VAG1598 (68 Pin) VAG1598/22. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v) for 5 SPD. AUTOMATIC TRANSMISSION 01V «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) for 5 SPD. AUTOMATIC TRANSMISSION 01V FRONT AND ALL WHEEL DRIVE - INTERNAL COMPONENTS, SERVICING «38 GEARS, CONTROL»(ref-278909-S16475499822008020700000) for 6 SPD. AUTOMATIC TRANSMISSION 09L ALL WHEEL DRIVE .

If the manufacturers test box is not being used, perform the following step.

1. Remove the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

1. Using a multimeter , check the Solenoid Valve electrical harness connector terminals to the Transmission Control Module (TCM) J217 electrical harness connector terminals for an open circuit.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

1. Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
2. If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and the resistance was not OK

1. Replace the faulty Solenoid Valve/Regulating Valve. Refer to «38 - AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS»(/audi/a4/b6-2000-2006/remont/differentials-drive-axles/#5-speed-automatic-transmission-01v-front-and-all-wheel-drive-internal-components-servicing) , Removing and Replacing.

If no malfunction is found in the wiring and the resistance was OK

1. Replace the Transmission Control Module (TCM) J217. Refer to --> «Transmission Control Module (TCM) J217 , Replacing»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__transmission-control-module-tcm-j217) .

Final procedures

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04 - Reset/Delete Diagnostic Data»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__diagnostic-mode-04-resetdelete-diagnostic) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code Description»(/audi/a4/b6-2000-2006/remont/cooling-fan/#30l-v6-5v-engine-controls-generic-scan-tool-engine-codes-avk-bgn__readiness-code-description) .

Additional Signals, Automatic Transmission, Checking

The following table provides quick links to all chapters in this section.

> CAN-Bus Terminal Resistance, Transmission Control Module (TCM) J217 to Engine Control Module (ECM) J220 , Checking

> Function

> Transmission Control Module (TCM) J217 , Voltage Supply, Checking

> Transmission Control Module (TCM) J217 , Replacing

CAN-Bus Terminal Resistance, Transmission Control Module (TCM) J217 to Engine Control Module (ECM) J220 , Checking

The Motronic Engine Control Module (ECM) J220 communicates with all databus capable control modules via a CAN databus.

These databus capable control modules are connected via two data bus wires which are twisted together (CAN_High and CAN_Low), and exchange information (messages). Missing information on the databus is recognized as a malfunction and stored.

Trouble-free operation of the CAN-bus requires that it have a terminal resistance. The central terminal resistor is located in the Engine Control Module (ECM) J220.

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirement

1. A CAN-Bus malfunction was recognized.
2. The Engine Control Module (ECM) J220 fuses OK.
3. Battery voltage at least 12.5 V.
4. Ignition switched off.

Removal

1. Remove the center dash panel - 1 - in the direction of the - arrow -.

Scheme 655

1. Remove the right upper dashboard panel.

Scheme 656