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

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

Special tools, testers and auxiliary items required
- Multimeter.
- Wiring diagram.

Test requirements
- Fuse S130 OK.
- The Fuel Pump (FP) Relay J17 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







- Remove the center noise insulation fasteners - arrows - and noise insulator.







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

Checking voltage
- Crank the engine.







- Using a Multimeter , check the Secondary Air Injection (AIR) Pump Motor -V101- electrical harness connector terminal 2 to Ground (GND).
Specified value: battery voltage.
- Switch the ignition off.

If the specified value was not obtained:
- Check the wiring connection from the Secondary Air Injection (AIR) Pump Relay -J299- socket 2/30 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)







- 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 Ohms 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-.

Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Diagnostic Mode 03 - Read DTC Memory
2. If necessary, erase the DTC memory. Diagnostic Mode 04 - Erase DTC Memory
3. If the DTC memory was erased, generate readiness code.

- End of diagnosis.