Secondary Air Injection Pump Motor V101, Checking

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements

• The Secondary Air Injection (AIR) Pump Relay -J299- fuses OK.
• The Power Supply Relay (terminal 30, B+) -J317- fuse OK.
• Battery voltage at least 12.5 V.
• All electrical consumers switched off (radiator fan must NOT run during test).
• A/C switched off.
• The ignition switched off.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK .

Start diagnosis

-- Remove the center noise insulation fasteners -1, 2, 3- and the center noise insulation panel.

Fig 1: Identifying Center Noise Insulation Fasteners

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Disconnect the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector -3-.

Fig 2: Identifying Secondary Air Injection (AIR) Pump Motor V101 Electrical Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Checking voltage

-- Start engine momentarily.

-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector terminal 2 to Ground (GND).

Fig 3: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Specified value: battery voltage.

If the specified value was not obtained:

-- Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay -J299- socket 2/87 to the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector terminal 2 for an open circuit or short circuit to each other, Battery (+), and Ground (GND).

-- Check the wiring connections for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking Ground (GND)

-- Using a Multimeter, check the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector terminal 1 to Ground (GND) connection on left headlamp for resistance.

Fig 4: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Specified value: 1.5 Ω Max.

If the specification was not obtained:

-- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK:

-- Replace Secondary Air Injection (AIR) Pump Motor -V101-.

-- Assembly is performed in the reverse of the removal.

Final procedures

After repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .

End of diagnosis