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Home >> Volkswagen >> 2003 >> Jetta Sedan (9M2) L4-1.8L Turbo (AWP) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Seconday Air Injection (AIR) Combination Valve, Checking >> With Generic Scan Tool
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With Generic Scan Tool



Combination Valve, Checking

Recommended special tools and equipment
- VAG1390 Hand Vacuum Pump

Requirements
- No leaks in vacuum lines or hose connections.
- Vacuum hoses not clogged or kinked
- Pressure hose for Secondary Air Injection (AIR) Pump Motor not clogged or kinked

Test sequence

NOTE: Do not use pressurized air for the following test.







- Disconnect vacuum hose -1- at Secondary Air Injection (AIR) Solenoid Valve -N112- (-2-).







- Disconnect pressure hose -3- at Secondary Air Injection (AIR) pump motor and blow air in with light pressure (arrow).

Combination valve must close.

NOTE: To disengage, compress the buttons at the hose coupling.

- Operate vacuum pump.

Combination valve must open.

If the combination valve does not open or it is constantly open:
- Replace combination valve.

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