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

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Special tools, testers and auxiliary items required

Multimeter.
Wiring diagram.

Test requirements

The Secondary Air Injection (AIR) Pump Relay -J299- fuses OK.
The Fuel Pump (FP) Relay J17 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 → Motronic Engine Control Module (ECM) J220 , replacing

Start diagnosis

Fig 1: Locating Vacuum Hose At Combination Valve

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect the secondary air injection hose - arrow -.
Disconnect the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector.

Checking voltage

Start engine momentarily.

Fig 2: 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.
Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained:

Fig 3: 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- terminal 2 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, lose or broken terminals.
If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking Ground (GND)

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 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, lose 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-.
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 MFI 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 repair work, the following work steps must be performed in the following sequence:

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

End diagnosis