volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Combination Valve, Checking|Page 2620 > < Vehicle Speed Sensor|Testing and Inspection
Page 1
background image

Air Injection Control Valve: Testing and Inspection
Combination Valve, Checking

Combination Valve, Checking

The following procedure is used to test all combination valves.

Special tools, testers and auxiliary items required

-

Hand vacuum pump.

Test conditions

-

secondary air injection (AIR) solenoid valve N112 OK.

-

secondary air injection (AIR) solenoid valve 2 N320 OK

-

Check vacuum system, including vacuum reservoir in intake manifold, for leaks.

-

Check that the vacuum lines are correctly connected.

-

Check the vacuum hoses for damage.

-

Vacuum lines not plugged.

Test sequence

-

Remove the vacuum hose from the combination valve.

-

Connect hand vacuum pump V.A.G 1390 to combination valve vacuum connection.

Combination Valve, Checking|Page 2620 > < Vehicle Speed Sensor|Testing and Inspection