Secondary Air Injection (AIR) Pump Motor -V101- , checking

WARNING: This page is about a different variant/trim than selected.

Special tools, testers and auxiliary items required

Multimeter.
Wiring diagram.

Test requirements

The Secondary Air Injection (AIR) Pump Relay -J299- Fuse 34 (on fuse panel) 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.

Procedure

Fig 1: Identifying Secondary Air Injection Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect the secondary air injection hose - arrow -.

Fig 2: Identifying Center Noise Insulation Fasteners

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Fig 3: Identifying Secondary Air Injection Pump Motor Electrical Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Checking voltage

Switch the ignition on.

Fig 4: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector terminals 1 to 2 for voltage.

Specified value: battery voltage.

Switch the ignition off.

If the specified value was not obtained:

Fig 5: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

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 a short circuit.
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)

Ensure key is off.

Fig 6: 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

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-.

For all Exhaust System, Emission control removal/installation procedures and torque specifications. Refer to 26 EXHAUST SYSTEM, EMISSION CONTROLS .

Fig 7: Identifying Center Noise Insulation Fasteners

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Fig 8: Identifying Secondary Air Injection Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect the secondary air injection hose - arrow -.
Erase the DTC memory. Refer to → Diagnostic Mode 04: Reset/delete diagnostic data
Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to → Readiness Code .

End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:

Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .
Assembly is performed in the reverse of the removal.

Final procedures

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

Check the DTC memory. Refer to.
If necessary, erase the DTC memory. Refer to.
If the DTC memory was erased, generate readiness code. Refer to.

End of diagnosis