Work sequence

• Remove sound insulation: Refer to NOISE INSULATION (GASOLINE ENGINES), ASSEMBLY OVERVIEW or NOISE INSULATION (DIESEL ENGINES), ASSEMBLY OVERVIEW
• Pull vacuum hose off combination valve on Secondary Air Injection (AIR) Solenoid Valve N112

Location: Refer to FUEL INJECTION, SERVICING

Fig 1: Manual Vacuum Pump VAG 1390 On Vacuum Hose Connected To Combination Valve

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• Connect Manual vacuum pump VAG 1390 on vacuum hose to combination valve.

Fig 2: Intake Hose At Combination Valve On Top Of Air Filter

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• Remove intake hose to combination valve on top of air filter - arrow  - and blow in with low pressure.

Combination valve must be closed.

• Start hand pump.

Combination valve should open.

If the combination valve does not open:

• Replace combination valve, refer to Combination valve, removing and installing  .