Test sequence

WARNING: This page is about a different car, the 1996 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect harness connector -2- from wastegate bypass regulator valve -1- ( -N75-).

Fig 1: Disconnecting Harness Connector From Wastegate Bypass Regulator Valve (Engine Codes 1Z, AHU)
Start engine and raise to maximum speed briefly by operating throttle.
- Wastegate operating rod -2- must move
Fig 2: Checking Wastegate Lever (Engine Codes 1Z, AHU)

If operating rod does not move:
Check wastegate lever -1- for ease of movement, if corroded together; replace turbocharger.
If the operating rod does not move, even though the lever is free to move:
Replace wastegate -3-.