Combination Valve, Checking - I

Combination Valve, Checking

Combination valve with vacuum connection
Engine code AEG up to 05.99

Special tools, testers and auxiliary items required







- Hand vacuum pump VA.G1390

Requirements
- No faults (DTCs) stored in Diagnostic Trouble Code (DTC) memory. Reading and Clearing Diagnostic Trouble Codes
- Final control diagnosis performed. Programming and Relearning
- Vacuum lines and hose connections free of leaks.
- Vacuum lines not blocked/kinked.

Work sequence
- Remove engine cover.







- Pull vacuum hose -1 - off Secondary Air Injection (AIR) solenoid valve -N112- -1
- Connect hand vacuum pump VA.G1390 to vacuum hose -1 -.

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

- Disconnect pressure hose from secondary air pump motor.

NOTE: To disconnect the hose press corrugated areas of ring together.

- Blow lightly into pressure hose - arrow -.
- Combination valve must be closed
- Operate hand vacuum pump.
- Valve must open

If combination valve does not open or is continually open:
- Replace combination valve.

Combination valve without vacuum connection
Engine codes AVH, AZG, BDC, BEV, BGD and AEG from 06.99

Requirements
- No faults (DTCs) stored in Diagnostic Trouble Code (DTC) memory. Reading and Clearing Diagnostic Trouble Codes
- Final control diagnosis performed. Programming and Relearning
- Hose unions must not leak.

Work sequence

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

- Remove engine cover.







- Remove pressure hose - arrow - on secondary air pump motor.

NOTE: To disconnect the hose press corrugated areas of rest ring together.

- Blow lightly into pressure hose to combination valve.
- Combination valve must be closed
- Blow forcibly into pressure hose to combination valve.
- Combination valve must open

If combination valve does not open or is continually open:
- Replace combination valve.