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

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

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• Disconnect the secondary air injection hose - arrow  -.

Fig 2: Identifying Center Noise Insulation Fasteners

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• 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

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• 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

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• 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

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• 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

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• 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

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• 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:

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

End of diagnosis