Test sequence

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Remove engine cover.

Fig 1: Locating Pressure Hose To Combi-Valve At Connection

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

NOTE:

To release, press buttons together on hose coupling.

Activate Secondary Air Injection (AIR) pump relay J299 via output Diagnostic Test Mode (DTM): → 01 ON BOARD DIAGNOSTIC (OBD) . 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

Output Diagnostic Test Mode was aborted

Switch ignition off.
Replace Secondary Air Injection (AIR) pump motor V101 ,.

If the secondary air injection pump motor does not run at intervals:

Check activation of Secondary Air Injection (AIR) pump motor V101 : → 01 ON BOARD DIAGNOSTIC (OBD)