With Manufacturer's Scan Tool

Secondary air inlet valve, checking

Engine: AEG

Special tools and equipment









- VAG 1594 Adapter set
- VAG 15927 Diode test light

Requirements
- Coolant temperature 5 to 33°C
- Secondary air pump motor OK.

Work sequence






- Pull upper vacuum hose (arrow) off secondary air inlet valve.
- Start engine and run at idling speed.

When secondary air pump motor runs a vacuum must be perceptible at secondary air inlet valve union.

If no vacuum is perceptible:

- Switch engine off.






- Disconnect 2-pin connector from secondary air inlet valve (arrow).






- Connect voltage tester VAG 1527B to the outer contacts of connector with auxiliary cables from V.A.G 1594C.
- start engine and run at idling speed.
The LED must light up.

LED lights up (voltage supply OK.):

- Replace secondary air inlet valve.

LED does not light up.

- Connect 2-pin connector
- Check activation of valve. [1][2]Output Diagnostic Test Mode (DTM), (Function 03)
- Check wiring, refer to wiring diagrams
- Read DTC memory Reading Diagnostic Trouble Codes
- Read readiness code: Monitors, Trips, Drive Cycles and Readiness Codes
- Generate readiness code again if DTC memory has been erased or engine control module was disconnected from permanent positive. Monitors, Trips, Drive Cycles and Readiness Codes