Volkswagen Workshop Service and Repair Manuals

Vehicles ▸05.00

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ V.A.G 1390 Hand vacuum pump

Check conditions

• ● No fault stored in fault memory

=> Repair group 01; Self-diagnosis; Interrogating fault memory

• ● Carry out final control diagnosis

=> Repair group 01; Self-diagnosis; final control diagnosis

• ● Vacuum pipes and hose connections free of leaks.
• ● Vacuum pipes not blocked/kinked.

Test sequence

• ‒ → Pull vacuum hose -1- off secondary air inlet valve -2- (N112).
• ‒ Connect hand vacuum pump V.A.G 1390 to vacuum hose -1-.
  

Note:

Do not use compressed air during the following check!

• ‒ → Detach pressure hose from secondary air pump motor and blow in lightly -arrow-.
       Combi-valve must be closed.
• ‒ Operate hand vacuum pump.
       Combi-valve must open.

If the combi-valve does not open:

• ‒ Replace the combi-valve

Vehicles 05.00 ▸

Check conditions

• ● No fault stored in fault memory

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ● Carry out final control diagnosis

=> Repair group 01; Final control diagnosis; Performing final control diagnosis

• ● Hose connections must seal properly.

Test sequence

Note:

Do not use compressed air during the following check!

• ‒ Remove engine cover.
• ‒ Detach the pressure hose =>Page 26-16 ; item 8 from the secondary air pump motor.

Note:

To release, press together the buttons on the hose coupling.

• ‒ Blow with light pressure into pressure hose to combi-valve.
       Combi-valve must remain closed.
• ‒ Blow with high pressure into pressure hose to combi-valve.
       Combi-valve must open.

If the combi-valve does not open, or is permanently open:

• ‒ Renew combi-valve.