Injection system (Audi Q5-8R)

Right side of the engine compartment 1. Air filter bypass flap valve "N₂75": units (bypass flap with air filter bypass flap valve "N₂75") are not installed in all kit variants and not for all countries; if the bypass damper is installed, it is located in the air filter housing, and the air filter bypass damper valve "N₂75" is fixed outside on the air filter housing; 2. Air flow meter "G70"; 3. Hall sensor "G40" (camshaft position sensor); 4. Fuel pressure regulating valve "N₂76"; 5. Pressure sensor 1 for exhaust gas "G450": after replacement it is necessary to carry out adaptation; 6. Electrical plug connection: exhaust gas temperature sensor 4 "G648"; 7. Coolant temperature sensor "G62"; 8. Sensor 4 exhaust gas temperature "G648"; 9. Used turbocharger 1 "J724"; 10. Connector of the temperature sensor in the exhaust gas recirculation system "G98"; 11. Electrical connector of exhaust gas temperature sensor 1 "G235": exhaust gas temperature sensor 1 "G235"; 12. Intake manifold flap motor "V157": cylinder bank 1; 13. Fuel line pipe of high pressure circuit; 14. High pressure fuel pump: with fuel metering valve "N₂90"; after replacing the fuel injection pump, it is "necessary" to carry out the first refueling (to prevent dry running); 15. Fuel metering valve "N₂90": do not open; installed directly in the high pressure fuel pump; 16. Oil pressure sensor for low pressure "F378"; 17. Fuel temperature sensor "G81"; 18. EGR radiator pump "V400"; 19. Coolant temperature sensor at the radiator outlet "G83"; 20. Pressure reducing valve: in the drainage pipes of the 1st and 2nd rows of cylinders; function of the pressure reducing valve, to provide residual pressure in the return fuel lines (scope of control) approx. 10 bar; this amount is necessary for the operation of piezo injectors; the pressure reducing valve should only be replaced together with the return fuel lines; after replacement, let the engine run for about 2 minutes at idle speed to remove air from the fuel system; 21. Nozzles (piezo injectors): cylinder bank 1

P. I 1. Plug connector of the exhaust gas temperature sensor 3 "G495"; 2. Sensor 3 exhaust gas temperature "G495": installed behind the catalytic converter; 45 Nm; 3. Lambda probe "G39" with heating for lambda probe "Z19": 50 Nm; 4. Intake manifold flap motor 2 "V275": cylinder bank 2; 5. Lambda probe plug connector "G39"; 6. Used engine "J623"; 7. Boost pressure sensor "G31": with intake air temperature sensor "G42"; 8. Used throttle valve "J338": 9 Nm; 9. Fuel pressure sensor "G247": 30 Nm; 10. Nozzles (piezo injectors): cylinder bank 2; 11. EGR radiator changeover valve "N345"; 12. Temperature sensor in the exhaust gas recirculation system "GOS"; IS. High pressure fuel pump: with fuel metering valve "N₂90"; after replacing the fuel injection pump, it is "necessary" to carry out the first refueling (to prevent dry running); 14. EGR servomotor "V338"; 15. Vacuum regulator: switching flaps from the EGR cooler; A. Low power heating relay "J359" and high power heating relay "J360"; B. Brake light switch "F" and foot brake pedal position switch "F47": in the footwell on the brake pedal; C. Accelerator pedal position sensor "G79" and accelerator pedal position sensor 2 "G185"; D. Engine speed sensor "G28"; E. Additional fuel pump "V393": under the right protective screen of the bottom; F. Oil pressure sensor "F22"; G. Oil pressure regulating valve "N428"; H. Additional fuel pump "V393"; I. Exhaust gas temperature sensor 1 "G235": on turbocharger; 45 Nm; J. Diesel particulate filter: installed at the bottom outside on the underbody of the vehicle; common unit with pre-connected main catalyst; after replacement, adaptation must be carried out