Check activation of the Secondary Air Injection (AIR) pump relay

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Switch ignition off.
Remove Secondary Air Injection (AIR) pump relay

Fig 1: Identifying Secondary Air Pump Relay Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect VAG1527B voltage tester as follows:

Relay carrier in E-box, plenum chamber, Position 3 Terminal	Measure to
6	Engine Ground (GND)

Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air Injection (AIR) rump relay -J299-.

LED must blink

If LED does not blink:

Switch ignition off.

Fig 2: VAG1598/31 Test Box Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect VAG1598/31 test box to harness connectors of wiring harness (do not connect ECM). Connect Ground (GND) clip at test box (not visible in illustration) to Ground (GND).

Refer to 24 MULTIPORT FUEL INJECTION (MFI)

Fig 3: Identifying Secondary Air Pump Relay Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check following wire connection for open circuit and short circuit to Ground (GND) and B+:

Relay carrier in E-box, Plenum chamber, Position 3 Terminal	VAG1598/31 test box Socket
6	46

Repair open circuit or short circuit if necessary.

If no malfunctions are detected:

Replace Secondary Air Injection (AIR) pump relay -J299-.