On Board Diagnostic - Generic Scan Tool - Engine Code(s): Caua (coupe) Audi S5 I

FUEL SYSTEM

For all fuel supply system component locations. Refer to Description and Operation

For all fuel supply system removal/installation procedures and torque specifications. Refer to Description and Operation

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 VAG 1598/42 is available for purchase or rental.

EVAP SYSTEM

For all EVAP system component locations and hose routing. Refer to Description and Operation

For the EVAP system hose routing. Refer to Description and Operation

For all EVAP system removal/installation procedures and torque specifications. Refer to Removal and Installation

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.

FUEL INJECTION SYSTEM

For all Motronic fuel injection system component locations. Refer to Description and Operation

For all Motronic fuel injection system removal/installation procedures and torque specifications. Refer to Removal and Installation

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 VAG 1598/42 is available for purchase or rental.

Observe Safety Precautions FUEL INJECTION SYSTEM => Safety Precautions

Observe Clean Working Conditions FUEL INJECTION SYSTEM => Clean Working Conditions

Observe Technical Data FUEL INJECTION SYSTEM => Technical Data

SAFETY PRECAUTIONS

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

CLEAN WORKING CONDITIONS

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 Clean Working Conditions

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

TECHNICAL DATA

ENGINE CONTROL MODULE

The 4.2L CAUA engine is regulated by one Engine Control Module (ECM), J623.

The Motronic Engine Control Module (ECM) -J623- 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 Engine Component Power Supply Relay -J757- as well as On Board Diagnostic (OBD).

SECONDARY AIR INJECTION SYSTEM

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 seconds. 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 seconds during idle for 5 seconds after every subsequent engine start up to max. 80° C coolant temperature and is checked by On Board Diagnostic (OBD).

FUEL PUMP, CHECKING

Special tools and workshop equipment required

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

Test conditions

1. Battery voltage min. 12.5 V.
2. Fuel filter OK.
3. Fuse -SB81- OK.

1. Fuel Pump (FP) Control Module -J538- OK.
2. Fuel tank at least 1 / 4 filled.
3. Ignition switched off.
4. Observe all safety precautions. Refer to «SAFETY PRECAUTIONS»(/audi/s5/i-2007-2011/remont/exhaust/#42l-general-technical-data-engine-mechanical-engine-codes-caua-coupe-as-of-042008__safety-precautions) .
5. Observe all clean working conditions. Refer to «CLEAN WORKING CONDITIONS»(/audi/s5/i-2007-2011/remont/exhaust/#42l-general-technical-data-engine-mechanical-engine-codes-caua-coupe-as-of-042008__clean-working-conditions) .

Work procedure

Slide the seats forward as far as possible. Then fold seat back forward.

Push the battery cover to the side -arrow A- and lift upward -arrow B-.

Scheme 66

Loosen the negative battery cable terminal nut -2- and remove the cable from the battery negative post.

Scheme 67

Loosen the positive battery cable terminal nut -2- and remove the cable from the battery positive post.

Remove the rear shelf Removal and Installation .

Remove the side trim panel Removal and Installation .

Remove the positive wire -4-.

Scheme 68

Disconnect the electrical connector station electrical connectors -3- and remove the connector station from the control module bracket and lay it to the side.

Remove the right rear relay and fuse carrier from the control module bracket and lay it aside -arrows-.

Disconnect the engine control module electrical connectors and remove the engine control module bracket -arrow- from vehicle.

Scheme 69

Using a pry bar, remove the electrical wiring harness from the rear bulkhead.

Fold the insulation mat up to gain access to the locking flange cover.

Scheme 70

Remove the right locking flange bolts -1 through 4- and remove the right locking flange cover.

Disconnect the electrical connector -arrow- from the right locking flange.

Scheme 71

Connect a Hand held remote control (jumper) to the right locking flange electrical terminal -1-.

Scheme 72

Connect a Hand held remote control (jumper) to the right locking flange electrical terminal -5-.

Press the Hand held remote control (jumper) button in to run the fuel pump.

Note. Fuel Pump (FP) runs quietly. Avoid surrounding noises when checking the fuel pump.

The fuel pump should operate and an audible noise heard.

If no operating noise is heard

Empty fuel tank if necessary.

Disconnect fuel lines -1, 2, 3- from the right locking flange by pressing release buttons.

Note. Depending on the version, there may be 2 instead of 3 lines.

Disconnect the right locking flange locking rings.

Scheme 73

Remove the fuel delivery unit locking flange and sealing ring from the fuel tank opening.

Scheme 74

Disconnect fuel line -1- on inside of the locking flange by pressing the release button.

Using a Multimeter, check the fuel delivery unit electrical terminals 1 to 5 for continuity.

Specified value: 0 ohms.

If the specified value is not obtained

Check the fuel delivery unit for an open circuit, short to Ground (GND), or short to Battery (+).

Check the fuel delivery unit for damage, corrosion, loose or broken terminals.

Repair the electrical circuit as necessary.

If there is no malfunction in the fuel lines, the fuel pump is faulty. Replace the fuel delivery unit.

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL DELIVERY, CHECKING

Special tools and workshop equipment required

1. Hand held remote control (jumper).
2. Multimeter.
3. Fuel pressure test set (high pressure).
4. Measuring container, fuel-resistant.

Test conditions

1. Battery voltage min. 12.5 V.
2. Fuel filter OK.
3. Fuse -SB81- OK.

1. Fuel Pump (FP) Control Module -J538- OK.
2. Fuel tank at least 1 / 4 filled.
3. Ignition switched off.
4. Observe all safety precautions. Refer to «SAFETY PRECAUTIONS»(/audi/s5/i-2007-2011/remont/exhaust/#42l-general-technical-data-engine-mechanical-engine-codes-caua-coupe-as-of-042008__safety-precautions) .
5. Observe all clean working conditions. Refer to «CLEAN WORKING CONDITIONS»(/audi/s5/i-2007-2011/remont/exhaust/#42l-general-technical-data-engine-mechanical-engine-codes-caua-coupe-as-of-042008__clean-working-conditions) .

Work procedure

Slide the seats forward as far as possible. Then fold seat back forward.

Push the battery cover to the side -arrow A- and lift upward -arrow B-.

Loosen the negative battery cable terminal nut -1- and remove the cable from the battery negative post.

Loosen the positive battery cable terminal nut -2- and remove the cable from the battery positive post.

Remove the rear shelf Removal and Installation .

Remove the side trim panel Removal and Installation .

Remove the positive wire -4-.

Disconnect the electrical connector station electrical connectors -3- and remove the connector station from the control module bracket and lay it to the side.

Remove the right rear relay and fuse carrier from the control module bracket and lay it aside -arrows-.

Disconnect the engine control module electrical connectors and remove the engine control module bracket -arrow- from vehicle.

Using a pry bar, remove the electrical wiring harness from the rear bulkhead.

Fold the insulation mat up to gain access to the locking flange cover.

Remove the right locking flange bolts -1 through 4- and remove the right locking flange cover.

Disconnect the electrical connector -arrow- from the right locking flange.

Connect a Hand held remote control (jumper) to the right locking flange electrical terminal -1-.

Connect a Hand held remote control (jumper) to the right locking flange electrical terminal -5-.

Press the Hand held remote control (jumper) button in to run the fuel pump.

Remove the fuel filler tube cover.

Install he protective body covers.

Note. A second technician must hold the lid securely while the rear lid gas-filled strut -3- is disengaged from the lower left joints.

Using a small screwdriver -1-, release the retaining spring -2- -arrow- and remove the gas-filled strut from the ball stud.

Remove the power steering reservoir cap on left engine compartment trim.

Loosen the quick-release fasteners and remove the left engine compartment trim -1-.

Scheme 75

Install the gas-filled strut back onto ball studs.

Disconnect the fuel supply line -arrow-.

Scheme 76

Connect a Fuel pressure test set (high pressure) to the fuel supply line.

Scheme 77

Connect an assisting hose -arrow- on the Fuel pressure test set (high pressure) and hold in a measuring container.

Open the pressure gauge shut-off valve.

Operate Hand held remote control (jumper) to run the fuel pump and slowly close the shut-off valve.

Specified value: 4 bar positive pressure.

From this point on do not move position of shut-off valve.

Empty the measuring container.

Operate Hand held remote control (jumper) to run the fuel pump for 15 seconds.

Scheme 78

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

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

If the minimum delivery quantity is not obtained, check for the following

1. Pinched fuel lines.
2. Clogged fuel filter.
3. Faulty fuel pump.

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL PUMP CONTROL MODULE, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC3- 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, selector lever in position "P" or "N".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customer's complaint. Refer to PRELIMINARY CHECK

Start diagnosis

Remove access cover beneath the carpet on the passenger side of the luggage compartment Refer to Removal and Installation

Checking voltage

Switch the ignition on.

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

Specified value: Battery voltage

Switch the ignition off.

If the specified value was not obtained

Check the Fuel Pump (FP) Control Module -J538- wiring harness terminals 3 to the Battery -A- B (+) terminal for an open circuit or short to Ground (GND).

Check the Fuel Pump (FP) Control Module -J538- wiring harness terminals 2 to the B (+) terminal for an open circuit or short to B+.

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Switch the ignition on.

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

Specified value: about 5 V

Switch the ignition off.

If the specified value was not obtained

Check the Fuel Pump (FP) Control Module -J538- wiring harness terminal 5 to the Engine Control Module (ECM) -J623- harness connector T94, terminal 70 for an open circuit or short to Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking Ground (GND)

Using a Multimeter --, check the Fuel Pump (FP) Control Module -J538- wiring harness terminal 4 to chassis ground for resistance.

Specified value: 1.5 ohms maximum.

If the specified value was not obtained

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

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

Replace the Fuel Pump (FP) Control Module -J538-.

Perform a road test to verify repair.

If the fault does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

EVAP SYSTEM, DETECTING LEAKS

Function

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

On the mechanical side, the leak detection system consists mainly of a vacuum-driven diaphragm pump, that is 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 to 30 m BYH. The pump membrane is then moved outward, thereby setting the reed contact at the actuation rod to the "open" position.
2. During leak diagnosis, the reed contact is monitored to check if it remains open within 15 seconds. This indicates the system is sealed.
3. If pressure falls (indicating a leak), the diaphragm moves back and the reed contact closes.
4. If reed contact closes within 15 seconds of leak detection time, a further test is performed: In this case the diaphragm pump pumps 4 times again. The engine control module (ECM) measures the time for each of the 4 pumps until the reed contact is closed again. From that, the control module can recognize a "small leak" (smaller 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 and workshop equipment 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

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 found

Check the fuel filler cap seal for damage and for proper installation. Replace if necessary.

Check the seals under the locking flanges and the union nuts are properly tightened on the fuel tank.

Check all hose connections of the fuel supply system and replace or repair any leaking lines.

Check all hose connections of the EVAP system and replace or repair any leaking lines.

Repair or replace any damaged component.

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

Erase the DTC memory if a DTC was set. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

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 .

End diagnosis.

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

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 - READ DTC MEMORY .

End diagnosis.

EVAP CANISTER PURGE REGULATOR VALVE, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC3- OK.
2. The ignition switched off.

Note. Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- is supplied by the Engine Component Power Supply Relay -J757-.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Scheme 79

Checking internal resistance

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

Scheme 80

Specified value: 22.0 to 30.0 ohms.

If the specified value was not obtained

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

If the specification is obtained

Checking voltage supply

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

Scheme 81

Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained

Check the wiring connection from the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector terminal 1 to the Engine Component Power Supply Relay -J757- terminal 2/87 for an open circuit or short to ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical connector terminal 2 to the Engine Control Module (ECM) -J623- electrical connector T60 terminal 9 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

LEAK DETECTION PUMP, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Fuse -S282- fuse OK.
2. The ignition switched off.

Note. The voltage for the Leak Detection Pump (LDP) --V144-- is supplied by the Engine Component Power Supply Relay -J757-.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove right rear wheel housing liner Description and Operation .

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

Scheme 82

Checking internal resistance

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

Scheme 83

If any of the specifications were not obtained

Replace the Leak Detection Pump (LDP) --V144--. Removal and Installation .

If the specified values were obtained

Checking voltage supply

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

Operate the starter briefly.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the wiring connection from the Leak Detection Pump (LDP) --V144-- electrical harness connector terminal 3 to the Engine Component Power Supply Relay -J757- terminal 2/87 for an open circuit or short to ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Leak Detection Pump (LDP) --V144-- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ELECTRONIC ENGINE 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) -J623- 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 (driver's intention) is a main input unit for the Motronic Engine Control Module (ECM) -J623-.

Operation of the throttle valve occurs by an electric motor (Throttle Drive (for Electronic Power Control (EPC)) -G186-) in the Throttle Valve Control Module - J338-. This is true across the entire engine speed and engine load spectrum.

Throttle valve is operated by Throttle Drive (for Electronic Power Control (EPC)) -G186- according to specifications of Motronic Engine Control Module (ECM) -J623-.

With engine off and ignition switched on, Motronic Engine Control Module (ECM) -J623- controls the Throttle Drive (for Electronic Power Control (EPC)) - G186- 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 Throttle Drive (for Electronic Power Control (EPC)) -G186- 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) -J623- 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.

THROTTLE POSITION SENSOR AND ACCELERATOR PEDAL POSITION SENSOR 2, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram

Test requirement

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.

Note. 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

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Scheme 84

Checking voltage supply and wiring

Switch the ignition on.

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

Scheme 85

Switch the ignition off.

If the specification is not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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) -J623- electrical connector T94 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

HEATED OXYGEN SENSOR 1, CHECKING

The following procedure is used to diagnose Heated Oxygen Sensor (HO2S) -G39- which is controlled by the Motronic Engine Control Module (ECM) -J623-.

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC2- OK.
2. The Oxygen Sensor (O2S) Heater -Z19- before catalytic converter OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Exhaust system between catalytic converter and cylinder head properly sealed.
8. Coolant Temperature at least 80° C.

Function test

Perform the function test located in diagnostic mode 06. DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If specified values are obtained

End diagnosis and switch the ignition off.

If the specified values are not obtained

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Scheme 86

Loosen the hose clamps -2- and -4- and remove the air filter housing.

Disconnect the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector -3-.

Scheme 87

Checking primary voltage

Crank the engine.

Using a multimeter, check the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector terminals 6 to 5 for voltage.

Scheme 88

Specified value: 0.400 to 0.500 Volts

Switch the ignition off.

If the specified value was not obtained

Replace Heated Oxygen Sensor (HO2S) -G39-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

HEATED OXYGEN SENSOR 2, CHECKING

The following procedure is used to diagnose Heated Oxygen Sensor (HO2S) 2 -G108- which is controlled by the Motronic Engine Control Module (ECM) -J623-.

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB10- OK.
2. The Oxygen Sensor (O2S) 2 Heater -Z28- before catalytic converter OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Exhaust system between catalytic converter and cylinder head properly sealed.
8. Coolant Temperature at least 80° C.

Function test

Perform the function test located in diagnostic mode 06. DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If specified values are obtained

End diagnosis and switch the ignition off.

If the specified values are not obtained

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

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

Checking primary voltage

Crank the engine.

Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 -G108- electrical harness connector terminals 6 to 5 for voltage.

Specified value: 0.400 to 0.500 Volts

Switch the ignition off.

If the specified value was not obtained

Replace Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Heated Oxygen Sensor (HO2S) 2 -G108- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

OXYGEN SENSOR 1, CHECKING

The following procedure is used to diagnose Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- which is controlled by the Motronic Engine Control Module (ECM) -J623-.

Note. When servicing the electrical harness connector terminals of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, use only gold-plated terminals.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB9- OK.
2. Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater - Z29- OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, selector lever in position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Exhaust system between catalytic converter and cylinder head properly sealed.
9. Coolant Temperature at least 80° C.

Function test

Perform the function test located in diagnostic mode 06. DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If specified values are obtained

End diagnosis and switch the ignition off.

If the specified values are not obtained

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- electrical harness connector -4-.

Checking primary voltage

Crank the engine.

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

Scheme 89

Specified value: 0.400 to 0.500 Volts

Switch the ignition off.

If the specified value was obtained

Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) - G130-. Refer to Removal and Installation .

If the specified value was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

OXYGEN SENSOR 2, CHECKING

The following procedure is used to diagnose Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- which is controlled by the Motronic Engine Control Module (ECM) -J623-.

Note. When servicing the electrical harness connector terminals of the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, use only gold-plated terminals.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB9- OK.
2. Oxygen Sensor (O2S) 2 (behind Three Way Catalytic Converter (TWC)) Heater -Z30- OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, selector lever in position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Exhaust system between catalytic converter and cylinder head properly sealed.
9. Coolant Temperature at least 80° C.

Function test

Perform the function test located in diagnostic mode 06. DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

If specified values are obtained

End diagnosis and switch the ignition off.

If the specified values are not obtained

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

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

Checking primary voltage

Switch the ignition on.

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 Volts

Switch the ignition off.

If the specified value was obtained

Replace the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. Refer to Removal and Installation .

If the specified value was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

End of Diagnosis

HEATED OXYGEN SENSOR 1 BEFORE CATALYTIC CONVERTER, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB10- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

Disconnect the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector -3-.

Checking internal resistance

Using a multimeter, check the Heated Oxygen Sensor (HO2S) -G39- terminals 3 to 4 for resistance.

Scheme 90

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

If the specification was not obtained

Replace Heated Oxygen Sensor (HO2S) -G39-. Refer to Removal and Installation .

If the specification was obtained

Checking voltage supply

Crank the engine.

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

Specified value: Battery voltage.

Switch the ignition off.

If the specification was not obtained

Check the wiring from the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector terminal 4 to the Engine Component Power Supply Relay -J757- socket 2/87 for an open circuit, a short circuit to Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter, check the Heated Oxygen Sensor (HO2S) -G39- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

HEATED OXYGEN SENSOR 2 BEFORE CATALYTIC CONVERTER, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB10- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

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

Checking internal resistance

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

Replace Heated Oxygen Sensor (HO2S) 2 -G108-. Refer to Removal and Installation .

If the specification was obtained

Checking voltage supply

Crank the engine.

Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 -G108- electrical harness connector terminal 4 to Ground (GND) for voltage.

Specified value: Battery voltage.

Switch the ignition off.

If the specification was not obtained

Check the wiring from the Heated Oxygen Sensor (HO2S) 2 -G108- electrical harness connector terminal 4 to the Engine Component Power Supply Relay -J757- socket 2/87 for an open circuit, a short circuit to Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 -G108- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

OXYGEN SENSOR 1 AFTER CATALYTIC CONVERTER, 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 serviced separately. When servicing terminals in harness connector of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, use only gold-plated terminals.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB9- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- electrical harness connector -4-.

Checking internal resistance

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

Scheme 91

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

If the specification was not obtained

Replace the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-. Refer to Removal and Installation .

If the specification was obtained

Checking voltage supply

Crank the engine.

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.

Specified value: Battery voltage.

Switch the ignition off.

If the specification was not obtained

Check the wiring from the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- electrical harness connector terminal 1 to the Engine Component Power Supply Relay -J757- socket 2/87 for an open circuit, a short circuit to Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

OXYGEN SENSOR 2 AFTER CATALYTIC CONVERTER, 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 serviced separately. When servicing terminals in harness connector of Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, use only gold-plated terminals.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SB9- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

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

Checking internal resistance

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

Replace the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-. Refer to Removal and Installation .

If the specification was obtained

Checking voltage supply

Crank the engine.

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.

Specified value: Battery voltage.

Switch the ignition off.

If the specification was not obtained

Check the wiring from the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- electrical harness connector terminal 1 to the Engine Component Power Supply Relay -J757- socket 2/87 for an open circuit, a short circuit to Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter, check the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to Battery positive (+) or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If the specification was obtained

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

MASS AIR FLOW SENSOR AND INTAKE AIR TEMPERATURE SENSOR, CHECKING

The following procedure is used to diagnose the Mass Air Flow (MAF) Sensor -G70- and Intake Air Temperature (IAT) Sensor -G42- which is controlled by Motronic Engine Control Module (ECM) -J623-.

Note. The Intake Air Temperature (IAT) Sensor -G42- is part of the Mass Air Flow (MAF) Sensor -G70- and cannot be replaced separately Use only gold-plated terminals when servicing terminals in harness connector of Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42-.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Fuse -SB5- fuse 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Coolant Temperature at least 80° C.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Connect the scan tool.

Start engine and let it run at idle.

Using the scan tool, Check the air flow quantity of the Mass Air Flow (MAF) Sensor -G70- and Intake Air Temperature (IAT) Sensor -G42- at idle

End diagnosis and switch ignition off.

If the specified value was obtained, but the DTC memory has a DTC indicating a Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- fault

Check the voltage supply of the Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- MASS AIR FLOW SENSOR AND INTAKE AIR TEMPERATURE SENSOR, CHECKING => Checking voltage supply .

If specified value was not obtained

Check the wiring of the Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- CHECKING ELECTRICAL CIRCUIT .

CHECKING VOLTAGE SUPPLY

Remove the engine compartment trim -1- and -3-.

Remove the engine cover -2-.

Disconnect the Mass Air Flow (MAF) Sensor -G70- and Intake Air Temperature (IAT) Sensor -G42- electrical harness connector -4-.

Scheme 92

Crank the engine.

Using a multimeter, check the Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- electrical harness connector terminal 2 to engine Ground (GND) for voltage.

Scheme 93

Specified value: battery voltage.

Switch the ignition off.

If specified value was not obtained

Check the Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- electrical harness connector terminal 2 to the Engine Component Power Supply Relay -J757- socket 2/87 for an open circuit or a short circuit to Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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

CHECKING ELECTRICAL CIRCUIT

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter, check the Mass Air Flow (MAF) Sensor -G70- /Intake Air Temperature (IAT) Sensor -G42- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms max.

If any of the specified values were not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Mass Air Flow (MAF) Sensor -G70- and Intake Air Temperature (IAT) Sensor -G42- Removal and Installation .

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ENGINE SPEED SENSOR, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Function

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.

Start diagnosis

Connect the scan tool.

Switch the ignition on.

Using the scan tool, check the engine speed

End diagnosis and switch ignition off.

If the specified value was not obtained

Procedure

Disconnect the Engine Speed (RPM) Sensor -G28- electrical harness connector -2-.

Scheme 94

Checking internal resistance

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

Scheme 95

Specified value: 0.7 to 1000 kohms

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

Replace the Engine Speed (RPM) Sensor -G28- Removal and Installation .

If the specified values are obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Engine Speed (RPM) Sensor -G28- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Remove the Engine Speed (RPM) Sensor -G28- and check the sensor wheel for proper seating, damage and run out Removal and Installation .

If the sensor wheel is OK

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

THROTTLE VALVE CONTROL MODULE, CHECKING

The following procedure is used to diagnose the Throttle Valve Control Module - J338- which is controlled by Motronic Engine Control Module (ECM) - J623-.

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Throttle valve must not be damaged or dirty.
8. Coolant Temperature at least 80° C.

Function

Throttle valve operation occurs by an electric motor (Throttle Drive (for Electronic Power Control (EPC)) -G186-) in the Throttle Valve Control Module - J338- and is operated by the Motronic Engine Control Module (ECM) -J623- according to the specifications of Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185 -.

The Throttle Valve Control Module -J338- Contains the following components

1. Throttle Drive (for Electronic Power Control (EPC)) -G186
2. Throttle Drive Angle Sensor 1 (for Electronic Power Control (EPC)) -G187
3. Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC)) -G188

Note: Failure of either Throttle Drive sensor requires replacement of the Throttle Valve Control Module J338.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Connect the scan tool.

Switch ignition on.

Using the scan tool, check the throttle valve position (absolute) at idle stop

Slowly depress the accelerator pedal to Wide Open Throttle (WOT) while observing the percentage display. The percentage display must increase uniformly.

Using the scan tool, check the throttle valve position (absolute) at Wide Open Throttle (WOT)

End diagnosis and switch ignition off.

If the specified values are not obtained

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

Scheme 96

Checking internal resistance

Using a multimeter, check the Throttle Valve Control Module -J338- electrical harness connector terminals 3 to 5 for resistance.

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

If the specified value was not obtained

Replace the Throttle Valve Control Module - J338-, Refer to Removal and Installation .

If the specified value was obtained

Using a Multimeter --, check the Throttle Valve Control Module -J338- electrical connector terminals 2 to 6 for voltage.

Scheme 97

Specified value: at least 4.5 V

Switch the ignition off.

If the specified value was obtained

Replace the Throttle Valve Control Module - J338- Removal and Installation .

If the specified value was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Throttle Valve Control Module -J338- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms max.

If the specification is not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL PRESSURE SENSOR, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Engine Control Module (ECM) - J623- fuses OK.
2. The fuel filter OK.
3. The battery voltage at least 12.5 V.
4. All electrical consumers switched off.
5. A/C switched off.
6. The fuel tank at least 1 / 4 filled.
7. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the intake manifold. Refer to Removal and Installation

Checking voltage

Disconnect the Fuel Pressure Sensor -G247- electrical harness connector -9-.

Scheme 98

Switch the ignition on.

Using a Multimeter --, check the Fuel Pressure Sensor -G247- for voltage.

Switch the ignition off.

If the specified values are obtained

Replace the Fuel Pressure Sensor -G247-.

If the specified values are not obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Fuel Pressure Sensor -G247- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification is not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

LOW FUEL PRESSURE SENSOR, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Fuel Pump (FP) Control Module -J538- OK.
2. The Engine Control Module (ECM) - J623- fuses OK.
3. The fuel filter OK.
4. The battery voltage at least 12.5 V.
5. All electrical consumers switched off.
6. A/C switched off.
7. The fuel tank at least 1 / 4 filled.
8. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Low Fuel Pressure Sensor -G410- electrical harness connector -2-.

Scheme 99

Checking voltage

Switch the ignition on.

Using a multimeter --, check the Low Fuel Pressure Sensor -G410- electrical harness connector for voltage.

Switch the ignition off.

If the specified values are obtained

Replace the Low Fuel Pressure Sensor -G410-.

If the specified values are not obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Low Fuel Pressure Sensor -G410- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T94 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL METERING VALVE 1, CHECKING

The following procedure is used to diagnose the Fuel Metering Valve -N290- which is controlled by Motronic Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Engine Component Power Supply Relay -J757- OK.
2. The Fuse -SB5- OK.
3. The fuel filter OK.
4. The parking brake engaged.
5. The battery voltage at least 12.5 V.
6. The selector lever of automatic transmission in position "P" or "N".
7. All electrical consumers switched off.
8. A/C switched off.
9. The fuel tank at least 1 / 4 filled.
10. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Fuel Metering Valve -N290- electrical harness connector -1-.

Scheme 100

Checking internal resistance

Using a Multimeter --, check the Fuel Metering Valve -N290- terminals 1 to 2 for resistance

Specified value: 450 to 1000 ohms.

If the specified value was not obtained

Replace the Fuel Metering Valve -N290-. Refer to Description and Operation

If the specified value was obtained

Checking voltage

Crank the engine.

Using a Multimeter --, check the Fuel Metering Valve -N290- electrical harness connector terminal 1 to Ground (GND) for voltage.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the wiring from the Fuel Metering Valve -N290- electrical harness connector terminal 1 to the Fuse (on fuse/relay panel) -S5- for an open circuit or a short circuit to Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking wiring connections

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter --, check the Fuel Metering Valve -N290- electrical harness connector terminal 2 to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal 60 for resistance.

Scheme 101

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+) or Ground (GND).

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL METERING VALVE 2, CHECKING

The following procedure is used to diagnose the Fuel Metering Valve 2 -N402- which is controlled by Motronic Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Engine Component Power Supply Relay -J757- OK.
2. The Fuse -SB5- OK.
3. The fuel filter OK.
4. The parking brake engaged.
5. The battery voltage at least 12.5 V.
6. The selector lever of automatic transmission in position "P" or "N".
7. All electrical consumers switched off.
8. A/C switched off.
9. The fuel tank at least 1 / 4 filled.
10. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Fuel Metering Valve 2 -N402- electrical harness connector -1-.

Checking internal resistance

Using a Multimeter --, check the Fuel Metering Valve 2 -N402- terminals 1 to 2 for resistance

Specified value: 450 to 1000 ohms.

If the specified value was not obtained

Replace the Fuel Metering Valve 2 -N402-. Refer to Description and Operation

If the specified value was obtained

Checking voltage

Crank the engine.

Using a Multimeter --, check the Fuel Metering Valve 2 -N402- electrical harness connector terminal 1 to Ground (GND) for voltage.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the wiring from the Fuel Metering Valve 2 -N402- electrical harness connector terminal 1 to the Fuse (on fuse/relay panel) -S5- for an open circuit or a short circuit to Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking wiring connections

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter --, check the Fuel Metering Valve 2 -N402- electrical harness connector terminal 2 to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal 35 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+) or Ground (GND).

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ENGINE COOLANT TEMPERATURE SENSOR, CHECKING

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

Special tools and workshop equipment required

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

Test requirements

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.
8. Engine cold.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Connect the scan tool.

Switch the ignition on.

Using the scan tool, check the coolant temperature

If the specified value is not obtained

Continue test according to the following table

If the specified value was obtained

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.

Replace the Engine Coolant Temperature (ECT) Sensor - G62- Removal and Installation .

Checking internal resistance

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

Scheme 102

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

Scheme 103

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

Scheme 104

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

Replace the Engine Coolant Temperature (ECT) Sensor - G62- Removal and Installation .

TESTING IF DISPLAY IS APPROX. - 40.0°C

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

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

Check the value indicated on the scan tool display.

If the value jumps to approx. 140.0° C

End diagnosis and switch the ignition off.

Replace the Engine Coolant Temperature (ECT) Sensor - G62- Removal and Installation .

If indication remains at approx. -40.0° C

TESTING IF DISPLAY APPROX. 140.0°C

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

If indication jumps to approx. -40.0° C

End diagnosis and switch ignition off.

Replace the Engine Coolant Temperature (ECT) Sensor - G62- Cooling System .

If indication remains at approx. 140.0° C

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the Engine Coolant Temperature (ECT) Sensor - G62- electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

INTAKE MANIFOLD RUNNER CONTROL VALVE, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC3- OK.
2. The Engine Component Power Supply Relay -J757- OK.
3. The parking brake engaged.
4. The battery voltage at least 12.5 V.
5. The selector lever of automatic transmission in position "P" or "N".
6. All electrical consumers switched off.
7. A/C switched off.
8. The fuel tank at least 1 / 4 filled.
9. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Disconnect the Intake Manifold Runner Control (IMRC) Valve -N316- electrical harness connector -2-.

Scheme 105

Checking internal resistance

Using a Multimeter --, check the Intake Manifold Runner Control (IMRC) Valve -N316- terminals 1 to 2 for resistance

Specified value: 450 to 1000 ohms.

If the specified value was not obtained

Replace the Intake Manifold Runner Control (IMRC) Valve -N316-. Refer to Removal and Installation .

If the specified value was obtained

Checking voltage

Crank the engine.

Using a Multimeter --, check the Intake Manifold Runner Control (IMRC) Valve -N316- electrical harness connector terminal 1 to ground (GND) for voltage.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the wiring from the Intake Manifold Runner Control (IMRC) Valve -N316- electrical harness connector terminal 1 to the Engine Component Power Supply Relay -J757- terminal 2/87 for an open circuit or a short circuit to Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter --, check the Intake Manifold Runner Control (IMRC) Valve -N316- electrical harness connector terminal 2 to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminal 35 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

INTAKE MANIFOLD RUNNER POSITION SENSOR 1, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Intake Manifold Runner Position Sensor -G336- fuse OK.
2. The Engine Component Power Supply Relay -J757- OK.
3. The parking brake engaged.
4. The battery voltage at least 12.5 V.
5. The selector lever of automatic transmission in position "P" or "N".
6. All electrical consumers switched off.
7. A/C switched off.
8. The fuel tank at least 1 / 4 filled.
9. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Disconnect the Intake Manifold Runner Position Sensor -G336- electrical harness connector -1-.

Checking voltage supply

Switch the ignition on.

Using a Multimeter --, check the Intake Manifold Runner Position Sensor -G336- electrical harness connector for voltage.

Switch the ignition off.

If the specified values are obtained

Replace the Intake Manifold Runner Position Sensor -G336-.

If the specified values are not obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter --, check the Intake Manifold Runner Position Sensor -G336- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 2.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

The Intake Manifold Runner Position Sensor -G336- must be adapted to the Engine Control Module (ECM) -J623-.

To adapt the Intake Manifold Runner Position Sensor -G336- to the Engine Control Module (ECM) -J623- perform the following steps

Adaptation requirements

1. The battery voltage at least 12.5 V.
2. Coolant temperature must be between 20° C and 80° C.
3. No DTC's stored in DTC memory.

Start the engine and let run at idle for at least 70 seconds.

The Engine Control Module (ECM) -J623- will automatically adapt the Intake Manifold Runner Position Sensor -G336-.

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

INTAKE MANIFOLD RUNNER POSITION SENSOR 2, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Engine Control Module (ECM) -J623- fuses OK.
2. The parking brake engaged.
3. The battery voltage at least 12.5 V.
4. The selector lever of automatic transmission in position "P" or "N".
5. All electrical consumers switched off.
6. A/C switched off.
7. The fuel tank at least 1 / 4 filled.
8. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Checking voltage supply

Disconnect the Intake Manifold Runner Position Sensor 2 -G512- electrical harness connector -2-.

Scheme 106

Switch the ignition on.

Using a Multimeter --, check the Intake Manifold Runner Position Sensor 2 -G512- electrical harness connector for voltage.

Switch the ignition off.

If the specified values are obtained

Replace the Intake Manifold Runner Position Sensor 2 -G512-.

If specified values are not obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a multimeter --, check the Intake Manifold Runner Position Sensor 2 -G512- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

The Intake Manifold Runner Position Sensor 2 -G512- must be adapted to the Engine Control Module (ECM) 2 -J624-.

To adapt the Intake Manifold Runner Position Sensor 2 -G512- to the Engine Control Module (ECM) -J623- perform the following steps

Adaptation requirements

1. The battery voltage at least 12.5 V.
2. Coolant temperature must be between 20° C and 80° C.
3. No DTC's stored in DTC memory.

Start the engine and let run at idle for at least 70 seconds.

The Engine Control Module (ECM) -J623- will automatically adapt the Intake Manifold Runner Position Sensor 2 -G512-.

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL INJECTORS, BANK 1, CHECKING

The following test procedure is used to diagnose all fuel injectors controlled by the Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

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

Test requirements

1. The Engine Control Module (ECM) -J623- fuses OK.
2. The Engine Speed (RPM) Sensor -G28- OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Observe Safety Precautions.

Observe Clean Working Conditions.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the intake manifold. Refer to Removal and Installation .

Disconnect the Fuel Injector -- electrical harness connectors -2, 3, 4, 5- from the Fuel Injector -- to be tested.

Checking internal resistance

Using a multimeter, check terminals 1 to 2 of the Fuel Injector -- to be tested for resistance.

Scheme 107

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

If the specified value was not obtained

Replace the faulty Fuel Injector -- Removal and Installation .

If the specified value was obtained

Checking activation

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

Scheme 108

Operate the starter and test the activation of the Fuel Injector --.

LED should flicker.

Switch the ignition off.

If LED flickers

Replace the faulty Fuel Injector -- Removal and Installation .

If LED does not flicker

Checking activation and wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the electrical harness connector terminals of the Fuel Injector -- to be tested to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification is not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

FUEL INJECTORS, BANK 2, CHECKING

The following test procedure is used to diagnose all fuel injectors controlled by the Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

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

Test requirements

1. The Engine Control Module (ECM) -J623- fuses OK.
2. The Engine Speed (RPM) Sensor -G28- OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Observe Safety Precautions.

Observe Clean Working Conditions.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the intake manifold. Refer to Removal and Installation .

Disconnect the Fuel Injector -- electrical harness connectors -2, 3, 4, 5- from the Fuel Injector -- to be tested.

Scheme 109

Checking internal resistance

Using a multimeter, check terminals 1 to 2 of the Fuel Injector -- to be tested for resistance.

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

If the specified value was not obtained

Replace the faulty Fuel Injector -- Removal and Installation .

If the specified value was obtained

Checking activation

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

Operate the starter and test the activation of the Fuel Injector --.

LED should flicker.

Switch the ignition off.

If LED flickers

Replace the faulty Fuel Injector -- Removal and Installation .

If LED does not flicker

Checking activation and wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the electrical harness connector terminals of the Fuel Injector -- to be tested to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for resistance.

Specified value: 1.5 ohms Max.

If the specification is not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), or Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ECM VOLTAGE SUPPLY, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring Diagram.

Test requirements

1. Fuse -SB4- OK.
2. Fuse -SB6- OK.
3. The Ground (GND) connections at the engine and transmission OK.
4. The battery voltage at least 12.5 V.
5. The generator OK.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Checking voltage supply

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

Specified value: 12.5 V

If the specified value was not obtained

Check the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminal 92 to the Battery -A- positive terminal for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Switch the ignition on.

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

Specified value: 12.5 V

Switch the ignition off.

If the specified value was not obtained

Check the Motronic Engine Control Module (ECM) -J623- electrical harness connector 94 terminal 3, 5, 6 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 4 for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Checking Ground (GND)

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

Specified value: 1.5 ohms.

If any of the specified values are not obtained

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

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

Perform a road test to verify any electrical repairs.

If the fault does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End of diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ECM POWER SUPPLY RELAY, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. wiring diagrams.

Test requirements

1. The Motronic Engine Control Module (ECM) -J623- fuses OK.
2. Fuse -SA2- OK.
3. The Ground (GND) connections at the engine and transmission OK.
4. The battery voltage at least 12.5 V.
5. The generator OK.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Specified value: 12.5 V

If the specified value was not obtained

Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 6 to the Battery -(+)- positive terminal for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

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

Specified value: 12.5 V

If the specified value was not obtained

Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 2 to Battery -A- positive terminal for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the following wiring connection for resistance.

Specified value: 1.5 ohms.

If the specified value was not obtained

Check the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 4 to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminal 69 for an open circuit or a short to Battery (+).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

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

Replace the Motronic Engine Control Module (ECM) Power Supply Relay -J271-.

Perform a road test to verify repair.

If the fault does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End of diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ENGINE COMPONENT POWER SUPPLY RELAY, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. wiring diagrams.

Test requirements

1. Fuse -SA2- OK.
2. The Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
3. The Ground (GND) connections at the engine and transmission OK.
4. The battery voltage at least 12.5 V.
5. The generator OK.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Specified value: 12.5 V

If the specified value was not obtained

Check the Engine Component Power Supply Relay -J757- socket 6 to the Battery -(+)- positive terminal for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

If no malfunctions are found in the wiring

Switch the engine on.

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

Specified value: 12.5 V

Switch the engine off.

If the specified value was not obtained

Check the Engine Component Power Supply Relay -J757- socket 6 to Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 8 for an open circuit or short to Ground (GND).

Check the electrical harness connectors for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter --, check the following wiring connection for resistance.

Specified value: 1.5 ohms.

If the specified value was not obtained

Check the Engine Component Power Supply Relay -J757- socket 4 to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 terminal 32 for an open circuit or a short to Battery (+).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the wiring connection.

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

Replace the Engine Component Power Supply Relay -J757-.

Perform a road test to verify repair.

If the fault does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End of diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

ENGINE CONTROL MODULE, REPLACING

Special tools and workshop equipment required

1. Heat gun.

Note. The Engine Control Module (ECM) -J623- -1- is bolted to a protective housing -5-. To make removing the shear bolts -4- for the retaining tabs -2- more difficult, the threads are coated with locking compound. To disconnect the electrical connectors from the Engine Control Module (ECM) -J623- (e.g. to connect the test box or to replace the ECM), the protective housing must be removed.

REMOVAL

Remove the right engine compartment trim -3-.

Disengage gas-filled strut to remove engine compartment trim.

Remove the four nuts on the Engine Control Module (ECM) -J623- retaining clips and tilt the clips to the side.

Remove Engine Control Module (ECM) -J623- -3-.

Scheme 110

The Engine Control Module (ECM) -J623- is secured with a retainer, shear bolts, and a protective housing to make it difficult to access the electrical harness connectors.

Scheme 111

The threads of the shear bolts -4- not installed in ECM are coated with locking compound and must be heated with the heat gun to remove both bolts.

Using a Heat gun set at its lowest setting, heat the shear bolt for approx. 20 to 25 seconds.

Scheme 112

Remove the shear bolt with locking pliers. Discard the used shear bolts.

Scheme 113

Repeat the previous steps for the second shear bolt.

Remove the protective housing from the Motronic Engine Control Module (ECM) -J623-.

Note. Adaptation values are erased when the connectors are disconnected from the Motronic Engine Control Module (ECM) -J623-, DTC memory content remains intact.

Disconnect the electrical harness connectors from the Motronic Engine Control Module (ECM) -J623-.

INSTALLING

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

The ECM must be installed with the protective housing.

Use new shear bolts.

Remove a thread compound from the threaded holes with a thread cutter (tap) to allow for new shear bolt installation.

After installing a new Motronic Engine Control Module (ECM) -J623-, the following work steps must be performed

Activate the Motronic Engine Control Module (ECM) -J623-.

CAN-BUS TERMINAL RESISTANCE, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirement

1. A CAN-Bus malfunction was recognized.
2. Motronic Engine Control Module (ECM) - J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Function

The Motronic Engine Control Module (ECM) -J623- 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 Motronic Engine Control Module (ECM) -J623- 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 Motronic Engine Control Module (ECM) -J623-.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Data Bus On Board Diagnostic Interface -J533- electrical harness connector.

Checking internal resistance

Note. The Motronic Engine Control Module (ECM) -J623- must remain connected for the following step.

Using a Multimeter, check the Data Bus On Board Diagnostic Interface -J533- electrical harness connector terminals 6 to 16 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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, check the Data Bus On Board Diagnostic Interface -J533- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

EXHAUST SYSTEM, CHECKING FOR LEAKS

Start engine and let run at idle.

Seal tailpipes with cloths or plug for the duration of the leak test.

Listen for leaks at the following connections: cylinder head/exhaust manifold, exhaust manifold/turbocharger, turbocharger/front exhaust pipe etc.

Repair detected leaks.

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.

Function test

Perform the function test in Diagnostic Mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS .

End diagnosis and switch the ignition off.

If the specified values are exceeded

Check the exhaust system for leaks.

If necessary, repair the leak in the exhaust system.

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify Repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

If no leaks are found in the exhaust system

Replace the catalytic converter including front exhaust pipe. Refer to Removal and Installation .

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

COMBINATION VALVE, CHECKING

Special tools and workshop equipment required

1. Hand vacuum pump

Test conditions

1. Hose connections properly sealed.

Work sequence

Remove the engine compartment trim.

Remove the engine cover -2-.

Remove the air filter housing bolts -arrows-.

Remove the air guide hoses -1- and -6- from the air filter housing.

Disconnect the mass air flow (MAF) sensor -G70- -5- and the mass air flow (MAF) sensor 2 -G246- -3- electrical connectors.

Loosen the hose clamps -2- and -4- and remove the air filter housing.

Note. Left secondary air combination valve shown. The right secondary air combination valve is similar.

Remove the vacuum hose -3- from secondary air injection (AIR) combination valve.

Scheme 114

Press the release buttons in and remove the secondary air hose -4-.

Connect a hand vacuum pump on vacuum connection -1- of the secondary air combination valve to be tested.

Scheme 115

Connect a suitable assisting hose to secondary air combination valve -2-.

Blow into assisting hose using light pressure (do not use pressurized air).

The secondary air combination valve must remain closed preventing air from passing through.

Operate the hand vacuum pump to create a vacuum

The secondary air combination valve must open allowing air to pass through.

If the secondary air combination valve does not open and close, or is stuck

Replace the faulty secondary air combination valve. Refer to Removal and Installation .

SECONDARY AIR INJECTION PUMP MOTOR, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -S130- OK.
2. The Secondary Air Injection (AIR) Pump Relay --J299-- OK.
3. Battery voltage at least 12.5 V.
4. All electrical consumers switched off.
5. A/C switched off.
6. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Install the protective body covers.

Note. A second technician must hold the lid securely while the rear lid gas-filled strut -3- is disengaged from the lower left joints.

Using a screwdriver -1-, remove the retaining spring -2- and remove the gas-filled strut from the ball stud.

Remove the power steering reservoir cap.

Loosen the quick-release fasteners and remove the left engine compartment trim -1-.

Reinstall the gas-filled strut back onto the ball studs.

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

Scheme 116

Checking voltage

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

Crank the engine.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

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

Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay --J299-- socket 8 to the Secondary Air Injection (AIR) Pump Motor --V101-- electrical harness connector terminal 2 for an open circuit or a short circuit.

Check the wiring connections for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking Ground (GND)

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

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Secondary Air Injection (AIR) Pump Motor --V101--. Refer to Removal and Installation .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

SECONDARY AIR INJECTION PUMP RELAY, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC3- OK.
2. Fuse -S130- OK.
3. Fuse -SD1- OK.
4. Battery voltage at least 12.5 V.
5. All electrical consumers switched off.
6. A/C switched off.
7. The ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Checking voltage

Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 2 to Ground (GND).

Specified value: battery voltage.

If the specified value was not obtained

Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay -J299- socket 2 to theBattery -A- (+) terminal for an open circuit or a short circuit to Ground (GND).

Check the wiring connections for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Switch the ignition on.

Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 8 to Ground (GND) for voltage.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay -J299- socket 8 to the Secondary Air Injection (AIR) Pump Motor -V101- socket 2 for an open circuit or a short circuit to Ground (GND).

Check the wiring connections for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, check the Secondary Air Injection (AIR) Pump Relay -J299- socket 6 to the Engine Control Module (ECM) -J623- electrical harness connector T94 terminal 49 for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

Check the wiring for an open circuit, a short circuit to each other, Battery (+), and Ground (GND).

Check the electrical harness connector for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

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

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to READINESS CODE .

End diagnosis.

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

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

SPEED SIGNAL, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Speedometer -G21- OK.
2. The Engine Control Module (ECM) -J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Function test

Connect the scan tool.

Perform a road test with a vehicle speed greater than 5 Km/h.

Using the scan tool, Check the vehicle speed

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

Check the wiring from the Engine Control Module (ECM) -J623- to the Instrument Cluster Control Module -J285- for an open circuit, Short to Battery (+), or to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

SPARK PLUGS, TEST DATA

IGNITION COILS WITH POWER OUTPUT STAGE, BANK 1, CHECKING

The following procedure is used to diagnose Ignition Coils with Power Output Stage -N70, N127, N291, N292- which are controlled by Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

1. Multimeter.
2. Diode test lamp.
3. Wiring diagram.

Test requirements

1. Fuse -SB8- OK.
2. The Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
3. The Engine Speed (RPM) Sensor -G28- OK.
4. The Camshaft Position (CMP) Sensor -G40- OK.
5. Battery voltage at least 12.5 volts.
6. All electrical consumers such as, lights and rear window defroster, switched off.
7. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
8. A/C switched off.
9. Ground (GND) connections between engine/transmission/chassis OK.
10. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the electrical harness connector screws -1- and -2-.

Scheme 117

Disconnect the Ignition Coil -- electrical harness connectors.

Checking voltage supply

Crank the engine.

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

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the Ignition Coil -- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Using a Multimeter, check the Ignition Coil -- electrical harness connector terminal 4 to Ground (GND) connection 2 (on engine right) for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit or a short circuit to Battery (+).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking activation

Disable the power supply to the Fuel Injectors --.

Using a diode test lamp, check the Ignition Coil -- electrical harness connector terminals 2 to 3 for voltage.

Crank the engine.

The LED should flicker.

Switch the ignition off.

If the LED flickers and the voltage was OK

Replace the faulty Ignition Coil with Power Output Stage -N70, N127, N291, N292- Removal and Installation .

If the LED does not flicker

Using a Multimeter, check the Ignition Coil -- electrical harness connector terminal 2 to Ground (GND) connection 2 (on right rear chassis side member) for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit or a short circuit to Battery (+).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Ignition Coil -- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified values were obtained

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

End of Diagnosis

IGNITION COILS WITH POWER OUTPUT STAGE, BANK 2, CHECKING

The following procedure is used to diagnose Ignition Coils with Power Output Stage - N323, N324, N325, N326- which are controlled by Engine Control Module (ECM) -J623-.

Special tools and workshop equipment required

1. Multimeter.
2. Diode test lamp.
3. Wiring diagram.

Test requirements

1. Fuse -SB8- OK.
2. The Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
3. The Engine Speed (RPM) Sensor -G28- OK.
4. The Camshaft Position (CMP) Sensor -G40- OK.
5. Battery voltage at least 12.5 volts.
6. All electrical consumers such as, lights and rear window defroster, switched off.
7. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
8. A/C switched off.
9. Ground (GND) connections between engine/transmission/chassis OK.
10. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Remove the engine compartment trim.

Remove the electrical harness connector screws -1- and -2-.

Scheme 118

Disconnect the Ignition Coil -- electrical harness connectors.

Checking voltage supply

Crank the engine.

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

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained

Check the Ignition Coil -- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Using a Multimeter, check the Ignition Coil -- electrical harness connector terminal 4 to Ground (GND) connection 2 (on engine right) for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit or a short circuit to Battery (+).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking activation

Disable the power supply to the Fuel Injectors --.

Using a diode test lamp, check the Ignition Coil -- electrical harness connector terminals 2 to 3 for voltage.

Crank the engine.

The LED should flicker.

Switch the ignition off.

If the LED flickers and the voltage was OK

Replace the faulty Ignition Coils with Power Output Stage -N323, N324, N325, N326- Removal and Installation .

If the LED does not flicker

Using a Multimeter, check the Ignition Coil -- electrical harness connector terminal 2 to Ground (GND) connection 2 (on right rear chassis side member) for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit or a short circuit to Battery (+).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Ignition Coil -- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

If the specified values were obtained

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

KNOCK SENSOR 1, CHECKING

Special tools and workshop equipment 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) - J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect Knock Sensor (KS) 1 -G61- electrical harness connector -11-.

Scheme 119

Checking internal resistance

Using a Multimeter, check Knock Sensor (KS) 1 -G61- terminals 1 to 2 for an internal short.

Scheme 120

Specified value: infinity (Infinity).

If the specified value was not obtained

Replace Knock Sensor (KS) 1 -G61-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Knock Sensor (KS) 1 -G61- electrical harness connector to the Motronic Engine Control Module (ECM) - J623- electrical harness connector T60 for resistance.

Scheme 121

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Knock Sensor (KS) 1 -G61-. Refer to Removal and Installation .

If no malfunction is found in the wiring and the resistance was OK

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

KNOCK SENSOR 2, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The mounting bolt of Knock Sensor (KS) 1 -G66- tightened to 20 Nm.
2. The Motronic Engine Control Module (ECM) - J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect Knock Sensor (KS) 2 -G66- electrical harness connector -10-.

Checking internal resistance

Using a Multimeter, check Knock Sensor (KS) 2 -G66- terminals 1 to 2 for an internal short.

Specified value: infinity (Infinity).

If the specified value was not obtained

Replace Knock Sensor (KS) 2 -G66-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Knock Sensor (KS) 2 -G66- electrical harness connector to the Motronic Engine Control Module (ECM) - J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Knock Sensor (KS) 2 -G66-. Refer to Removal and Installation .

If no malfunction is found in the wiring and the resistance was OK

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

KNOCK SENSOR 3, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The mounting bolt of Knock Sensor 3 -G198- tightened to 20 Nm.
2. The Motronic Engine Control Module (ECM) - J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect Knock Sensor 3 -G198- electrical harness connector -8-.

Checking internal resistance

Using a Multimeter, check Knock Sensor 3 -G198- terminals 1 to 2 for an internal short.

Specified value: infinity (Infinity).

If the specified value was not obtained

Replace Knock Sensor 3 -G198-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Knock Sensor 3 -G198- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Knock Sensor 3 -G198-. Refer to Removal and Installation .

If no malfunction is found in the wiring and the resistance was OK

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

KNOCK SENSOR 4, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The mounting bolt of Knock Sensor 4 -G199- tightened to 20 Nm.
2. The Motronic Engine Control Module (ECM) - J623- fuses OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect Knock Sensor 4 -G199- electrical harness connector -7-.

Checking internal resistance

Using a Multimeter, check Knock Sensor 4 -G199- terminals 1 to 2 for an internal short.

Specified value: infinity (Infinity).

If the specified value was not obtained

Replace Knock Sensor 4 -G199-. Refer to Removal and Installation .

If the specified value was obtained

Checking wiring

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

Install the test box.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Knock Sensor 4 -G199- electrical harness connector to the Engine Control Module (ECM) -J623- electrical harness connector T60a for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Knock Sensor 4 -G199-. Refer to Removal and Installation .

If no malfunction is found in the wiring and the resistance was OK

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT POSITION SENSOR 1, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Position (CMP) Sensor -G40- electrical harness connector -4-.

Scheme 122

Switch the ignition on.

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

Scheme 123

Specified value: about 5.0 V

Switch the ignition off.

If the specification was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Position (CMP) Sensor -G40- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Camshaft Position (CMP) Sensor -G40-. Refer to Removal and Installation .

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT POSITION SENSOR 2, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) -J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

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

Scheme 124

Switch the ignition on.

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

Switch the ignition off.

If the specification was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Position (CMP) Sensor 2 -G163- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Camshaft Position (CMP) Sensor 2 -G163-. Refer to Removal and Installation .

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT POSITION SENSOR 3, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) - J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector -9-.

Switch the ignition on.

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

Switch the ignition off.

If the specification was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, check the Camshaft Position (CMP) Sensor 3 -G300- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Camshaft Position (CMP) Sensor 3 -G300-. Refer to Removal and Installation .

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT POSITION SENSOR 4, CHECKING

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

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Motronic Engine Control Module (ECM) -J623- 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".
5. A/C switched off.
6. Ground (GND) connections between engine/transmission/chassis OK.
7. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Position (CMP) Sensor 4 -G301- electrical harness connector -11-.

Switch the ignition on.

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

Switch the ignition off.

If the specification was not obtained

Checking wiring

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

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Position (CMP) Sensor 4 -G301- electrical harness connector to the Motronic Engine Control Module (ECM) -J623- electrical harness connector T94 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace Camshaft Position (CMP) Sensor 4 -G301-. Refer to Removal and Installation .

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT ADJUSTMENT VALVE 1, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC7- 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.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Adjustment Valve 1 -N205- electrical harness connector -1

Checking internal resistance

Using a Multimeter, check the Camshaft Adjustment Valve 1 -N205-, for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20° C)

If the specified value was not obtained

Replace the Camshaft Adjustment Valve 1 -N205-. Refer to Removal and Installation .

If the specified value was obtained

Checking voltage

Switch the ignition on.

Using a Multimeter, check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 2 to Ground (GND) for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- terminal 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT ADJUSTMENT VALVE 2, CHECKING

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Fuse -SC7- 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.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Adjustment Valve 2 -N208- electrical harness connector -5

Checking internal resistance

Using a Multimeter, check the Camshaft Adjustment Valve 2 -N208- for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20° C)

If the specified value was not obtained

Replace the Camshaft Adjustment Valve 2 -N208-. Refer to Removal and Installation .

If the specified value was obtained

Checking voltage

Switch the ignition on.

Using a Multimeter, check the Camshaft Adjustment Valve 2 -N208- electrical harness connector terminal 2 to Ground (GND) for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

Check the Camshaft Adjustment Valve 2 -N208- electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- terminal 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Adjustment Valve 2 -N208- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) electrical harness connector T60 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT ADJUSTMENT VALVE 1, EXHAUST, CHECKING

The following procedure is used to diagnose Camshaft Adjustment Valve 1 (exhaust) -N318- which is controlled by Motronic Engine Control Module (ECM) - J623-.

Special tools and workshop equipment 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.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector -4

Checking internal resistance

Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) -N318-, for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20° C)

If the specified value was not obtained

Replace the Camshaft Adjustment Valve 1 (exhaust) -N318-. Refer to Removal and Installation .

If the specified value was obtained

Checking voltage

Switch the ignition on.

Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 2 to Ground (GND) for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

Check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- terminal 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) electrical harness connector for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

CAMSHAFT ADJUSTMENT VALVE 2, EXHAUST, CHECKING

Special tools and workshop equipment 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.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

Disconnect the Camshaft Adjustment Valve 2 (exhaust) -N319- electrical harness connector -6

Checking internal resistance

Using a Multimeter, check the Camshaft Adjustment Valve 2 (exhaust) -N319- for resistance.

Specified value: 5.0 to 8.0 ohms (at approx. 20° C)

If the specified value was not obtained

Replace the Camshaft Adjustment Valve 2 (exhaust) -N319-. Refer to Removal and Installation .

If the specified value was obtained

Checking voltage

Switch the ignition on.

Using a Multimeter, check the Camshaft Adjustment Valve 2 (exhaust) -N319- electrical harness connector terminal 2 to Ground (GND) for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

Check the Camshaft Adjustment Valve 2 (exhaust) -N319- electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- terminal 2/87 for an open circuit or a short circuit to Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

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.

Install the test box.

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

Remove the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

Using a Multimeter, Check the Camshaft Adjustment Valve 2 (exhaust) -N319- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) electrical harness connector T94 for resistance.

Specified value: 1.5 ohms Max.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, loose or broken terminals.

If necessary, repair the faulty wiring connection.

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

Replace the Motronic Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .

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

Final procedures

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

1. Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-03-read-dtc) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__diagnostic-mode-04-erase-dtc) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/s5/i-2007-2011/remont/cooling-fan/#42l-generic-scan-tool-engine-codes-caua-coupe-as-of-042008__readiness-code) .

See also:
• Description and Operation
• Description and Operation
• Removal and Installation
• SAFETY PRECAUTIONS
• CLEAN WORKING CONDITIONS
• Removal and Installation
• DIAGNOSTIC MODE 03 - READ DTC MEMORY
• DIAGNOSTIC MODE 04 - ERASE DTC MEMORY
• READINESS CODE
• PRELIMINARY CHECK
• Removal and Installation
• Description and Operation
• DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS
• Removal and Installation
• Removal and Installation
• FUEL INJECTION SYSTEM => Safety Precautions
• ENGINE CONTROL MODULE, REPLACING
• MASS AIR FLOW SENSOR AND INTAKE AIR TEMPERATURE SENSOR, CHECKING => Checking voltage supply
• CHECKING ELECTRICAL CIRCUIT
• ENGINE COOLANT TEMPERATURE SENSOR, CHECKING => Testing if display is approx. - 40.0° C