Volkswagen Workshop Service and Repair Manuals

(Only engine codes 1Z and AHU)

Check conditions

• ● Engine oil temperature min. 80 °C

Test sequence

• ‒ → Pull off charge pressure control solenoid valve (N75) -1- connector -2-.

• ‒ → Start engine and raise to maximum speed briefly by operating throttle. The operating rod -2- for charge pressure regulating valve must
       move.

If the operating rod does not move:

• ‒ Check charge pressure regulating valve lever -1- for ease of movement. When corroded together, renew turbocharger.

If the operating rod does not move, even though the lever is free to move:

• ‒ Renew pressure unit for charge pressure regulating valve -3-.