Pressure Unit For Charge Air Pressure Regulating Valve Checking

Pressure unit for charge air pressure regulating valve, checking


Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
^ VAG 1551 scan tool or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Check conditions
^ Engine oil temperature min. 60°C
^ No leaks on intake and exhaust systems.

Test sequence





- Pull off wastegate bypass regulator valve (N75)-1-connector-2-.





- Start engine and raise to maximum speed briefly by operating throttle. The operating rod-2-for charge air pressure regulating valve must move.
If the operating rod does not move:
- Check charge air pressure control valve lever-1-for ease of movement. When corroded together, replace turbocharger.
If the operating rod does not move, even though the lever is free to move:
- Turbocharger malfunctioning. Replace turbocharger.
- Check DTC memory.
- Read out readiness code.
- If the DTC memory has been erased or the engine control module separated from the permanent positive, the readiness code must be generated again.