Combination Valve, Checking - II

Combination Valve, Checking

Recommended special tools and equipment
- VA.G1390 Hand Vacuum Pump

Test 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
- Ignition switched off.

Test sequence

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

- Remove engine cover.







- Disconnect vacuum hose -1- at Secondary Air Injection (AIR) Solenoid Valve -N112- (-2-).
- Connect hand vacuum pump (V.A.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 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