Combination Valve, Checking - II

Combination Valve, Checking

Vehicles with engine code AEG up to 05.99:

Recommended special tools and equipment
- VA.G1390 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

Work sequence

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

- Remove front sound insulation.







- Disconnect vacuum hose -1- from combination valve at Secondary Air Injection (AIR) solenoid valve -N112- -2-.
- Connect hand vacuum pump VA.G 1390 at vacuum hose -1- to combination valve.
- Disconnect pressure hose at Secondary Air Injection (AIR) pump motor (arrow) and blow into it with light pressure.
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.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

Vehicles with engine code AEG as of 06.99, AVH, AZG, BDC, BEV, BGD

Requirements
- Pressure hose for Secondary Air Injection (AIR) pump motor not clogged or linked
- Hose connections must be properly sealed.

Work sequence

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

- Remove front noise insulation.







- Disconnect pressure hose (arrow) from Secondary Air Injection (AIR) pump motor.

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

- Blow with light pressure into pressure hose to combination valve
Combination valve must close.

- Blow with high pressure into pressure hose to combination valve
Combination valve must open.

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

- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes