Audi A4


Audi A4 (AEB) EVAP Canister Purge Regulator Valve, Checking

Audi A4 (AEB) EVAP Canister Purge Regulator Valve, Checking

EVAP Canister Purge Regulator Valve, Checking Audi A4 Special tools and workshop equipment required Multimeter . Wiring diagram. Test requirements Fuse S229 OK. The ignition switched off. Note Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 is supplied by the Fuel Pump (FP) Relay J17 . Test procedure Perform a preliminary check to verify the customers complaint. Refer to Go to article . Start diagnosis Disconnect the Evaporative Emissio..

Audi A4 (AEB) EVAP System Leak Detection

Audi A4 (AEB) EVAP System Leak Detection

EVAP System Leak Detection Audi A4 FunctionThe leak detection system recognizes leaks in the complete fuel system, including the fuel tank, EVAP canister and the Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 .On the mechanical side, the leak detection system consists mainly of a vacuum-driven diaphragm pump equipped with a reed contact on the actuation rod of the pump diaphragm. The pump is supplied with vacuum by the engine intake stroke. When leak detection is activate..

Audi A4 (AEB) EVAP System, Checking for Proper Seal

Audi A4 (AEB) EVAP System, Checking for Proper Seal

EVAP System, Checking for Proper Seal Audi A4 Special tools and workshop equipment required Smoke tester . EVAP and Fuel Supply System Vacuum hose and line routing diagram. Note Secure all hose connections using hose clamps appropriate for the model type Parts catalog . 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 ..

Audi A4 (AEB) Exhaust System Components, Removing and Installing

Audi A4 (AEB) Exhaust System Components, Removing and Installing

Exhaust System Components, Removing and Installing Audi A4 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. Refer to Tool catalog . 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 instal..

Audi A4 (AEB) Fuel Injection System, Servicing

Audi A4 (AEB) Fuel Injection System, Servicing

Fuel Injection System, Servicing Audi A4 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. Refer to the Tool catalog . 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..

Audi A4 (AEB) Fuel Injectors, Checking

Audi A4 (AEB) Fuel Injectors, Checking

Fuel Injectors, Checking Audi A4 The following test procedure is used to diagnose all fuel injectors. Special tools and workshop equipment required Multimeter . Diode test lamp (12V) . Wiring diagram. Test requirements Fuse S234 OK. Fuel Pump (FP) Relay J17 OK. Battery voltage at least 12.5 volts. All electrical consumers such as, lights and rear window defroster, switched off. Vehicles with automatic transmission, shift selector lever into liition “P” or “N”. A/C switch..

Audi A4 (AEB) Fuel Pump Delivery Quantity, Checking

Audi A4 (AEB) Fuel Pump Delivery Quantity, Checking

Fuel Pump Delivery Quantity, Checking Audi A4 Special tools and workshop equipment required Hand held remote control (jumper) . Multimeter . Electrical connector test lead set . Fuel pressure test set (high pressure) . Measuring container, fuel-resistant . Test conditions Battery voltage 12.5 V Fuel filter OK Fuel tank at least 1/4 filled. Fuel pressure regulator OK. Ignition switched off. Test sequence Remove the cover of the fuse box on the left of the instrument cluster. ..

Audi A4 (AEB) Fuel Pump Electrical Test

Audi A4 (AEB) Fuel Pump Electrical Test

Fuel Pump Electrical Test Audi A4 Special tools and workshop equipment required Hand held remote control (jumper) . Multimeter . Ring Nut Spanner 3217 . Wiring diagram. Test conditions Fuse S228 OK. Battery voltage 12.5 V. Fuel Pump (FP) Relay J17 OK. Fuel filter OK. Ignition switched off. Test sequence Remove the cover of the fuse box on the left of the instrument cluster. Remove Fuse S228 . Connect a Hand held remote control (jumper) lead to fuse holder, soc..

Audi A4 (AEB) Fuel Supply System, Servicing

Audi A4 (AEB) Fuel Supply System, Servicing

Fuel Supply System, Servicing Audi A4 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. Refer to Tool catalog . 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 manufa..

Audi A4 (AEB) General Diagnosis

Audi A4 (AEB) General Diagnosis

General Diagnosis Audi A4 Preliminary checkBefore performing any pin point test or component diagnosis, a preliminary check must be performed.Check the Technical Bulletins for information that may supersede any information included in this manual. Connect the scan tool. Switch the ignition on. Using the scan tool, check for any stored or related DTC's. If other DTC's are stored: Repair these DTC's first before performing the following procedure. If no other DTC's are stored: Using the scan..




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