Air Injection Vacuum Control Solenoid Valve: Testing and Inspection

CHECKING SECONDARY AIR INJECTION SOLENOID VALVE

REQUIREMENTS
^ Engine oil temperature 15 - 85°C (58 - 185°F).

PROCEDURE
- Disconnect vacuum hose from AIR Inlet Valve, and route upwards.
- Start engine and run at idle.

NOTE: After approx. 20 seconds, the AIR Pump Motor (V101) should run for approx. 5 seconds, and intake manifold pressure must be present at vacuum hose.

- If no intake manifold vacuum is present:

- Stop engine.
- Disconnect 2-pin connector from AIR Solenoid Valve (N112).
- Connect VAG 1527B voltage tester to the open connector using cables from VAG 1594 adapter kit.
- Start engine and run at idle.
- After approx. 20 seconds, LED must light for approx. 5 seconds.

- If LED lights (voltage supply OK):

- Replace Secondary Air Injection Solenoid Valve.

- If LED does NOT light:

- Reconnect 2-pin connector.
- Check activation of Secondary Air Injection (AIR) Solenoid Valve.

- If AIR Solenoid Valve cannot be felt to switch during the electrical check:

- Check for malfunction of Secondary Air Injection (AIR) Pump Relay. Refer to: Wiring Diagrams
- Check Diagnostic Trouble Code (DTC) Memory.