Secondary Air Injection (air) Pump Motor V101 , Checking Audi TT 8N

Special tools, testers and auxiliary items required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. Secondary Air Injection (AIR) Pump Relay J299 OK.
2. Fuel Pump (FP) Relay J17 OK.
3. Battery voltage at least 12.5 V.
4. All electrical consumers switched off (radiator fan must NOT run during test).

1. A/C switched off.
2. The ignition switched off.

Test procedure

1. Perform a preliminary check to verify the customers complaint. Refer to --> «General Diagnosis»(ref-276276-S40851803372008010300000) .

Start diagnosis

1. Disconnect the secondary air injection hose - arrow -.

Scheme 50

1. Remove the center noise insulation fasteners - 1, 2, 3, 4 - and the center noise insulation panel.

Scheme 51

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

Checking voltage

1. Start engine momentarily.

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

Specified value: battery voltage.

If the specified value was not obtained

1. 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

1. 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.
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

If the specified value was obtained

Checking Ground (GND)

1. Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 1 to Ground (GND) connection 2 (on left front long member) for resistance.

Specified value: 1.5 ohms Max.

If the specification was not obtained

1. Check the Secondary Air Injection (AIR) Pump Motor V101 electrical harness connector terminal 1 to Ground (GND) connection 2 (on left front long member) for a short circuit to each other, Battery (+), and Ground (GND).
2. Check the electrical harness connector for damage, corrosion, loose or broken terminals.
3. If necessary, repair the faulty wiring connection.

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

1. Replace Secondary Air Injection (AIR) Pump Motor V101. Refer to --> «26 EXHAUST SYSTEM, EMISSION CONTROLS»(ref-276269-S01656351712008010300000) .
2. Erase the DTC memory. Refer to --> «Diagnostic Mode 04: Reset/Delete Diagnostic Data»(ref-276276-S31279847122008010300000) .
3. Perform a road test to verify repair.

If the DTC does not return

Repair complete, Generate readiness code. Refer to --> Readiness Code .

1. End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK

1. Replace the Secondary Air Injection (AIR) Pump Relay J299.
2. 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.
2. If necessary, erase the DTC memory. Refer to «Diagnostic Mode 04: Reset/Delete Diagnostic Data»(ref-276276-S31279847122008010300000) .
3. If the DTC memory was erased, generate readiness code. Refer to «Readiness Code»(ref-276276-S05799074302008010300000) .

End of diagnosis.