With Manufacturer's Scan Tool

Secondary Air Injection (AIR) pump motor -V101-, checking

Special tools and equipment





^ V.A.G 1551 Scan Tool (or vehicle system tester V.A.G 1552) with cable V.A.G 1551/3

Note: All functions which could previously be performed V.A.G. 1551/1552 can also be performed with the new tester VAS 5051.





Test conditions

^ Fuses must be OK.





^ Main fuses must be OK.
^ Battery voltage must be at least 11.5 V
^ All electrical consumers, e.g. lights and rear window defroster must be switched off.
^ If the vehicle is equipped with air conditioning, this must be switched off.
^ Selector lever must be in position "P" or "N" on models with an automatic transmission.
^ Intake and pressure hoses for secondary air injection pump motor not blocked or kinked
^ Fuel Pump (FP) relay -J17- must be OK, checking:
Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations
^ No DTC's may be stored in DTC memory
Refer to Powertrain Management

Test sequence
- Remove engine cover.





- Disconnect pressure hose to combi-valve at coupling -arrow-.

Note: To release, press buttons together on hose coupling.

- Activate Secondary air injection pump relay -J299- via output Diagnostic Test Mode (DTM)
Secondary air injection pump motor must run at intervals and air must exit at outlet of pressure hose.
If the motor runs, but little or no air exits:
- Press C key to abort output DTM.





Indicated on display
- Switch ignition off.
- Replace Secondary air injection pump motor -V101.
If the secondary air injection pump motor does not run at intervals:
- Check activation of Secondary air injection pump motor -V101-
Refer to Powertrain Management