volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Diagram Information and Instructions|Page 4672 > < Diagram Information and Instructions|Page 4670
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Air Injection Control Valve: Testing and Inspection

Combi-Valve, Checking

Special tools, testers and auxiliary items required

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Hand vacuum pump V.A.G 1390

Requirements

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No DTCs stored in Diagnostic Trouble Code (DTC) memory. See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures

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Output Diagnostic Test Mode (DTM) performed. See: Computers and Control Systems/Testing and Inspection/Programming and Relearning

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Vacuum lines and hose connections free of leaks

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Vacuum lines not blocked/kinked

Work sequence

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Remove engine cover.

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Pull vacuum hose -1- off Secondary Air Injection (AIR) solenoid valve -N112- -2 -.

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Connect hand vacuum pump V.A.G 1390 to vacuum hose -1 -.

NOTE:  Do not use compressed air during the following check.

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Disconnect pressure hose from secondary air pump motor by pressing corrugated area of ring together.

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Blow lightly into pressure hose -arrow -.

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Combi-valve must be closed

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Operate hand vacuum pump.

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Combi-valve must open

If combi-valve does not open:

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Replace combi-valve.

Diagram Information and Instructions|Page 4672 > < Diagram Information and Instructions|Page 4670