With Manufacturer's Scan Tool

Pressure Unit For Charge Air Pressure Regulating Valve, Checking

Special tools and equipment
- VAG 1551 Scan Tool or vehicle system tester VAG 1552 with cable VAG 1551/3

Check conditions
- Engine oil temperature min. 60 degrees 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.

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 readiness code.
- Generate readiness code again if DTC memory has been erased or engine control module separated from permanent positive.