Secondary Air Injection (AIR) Pump Motor, Checking

Secondary Air Injection (AIR) pump motor, checking

Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram

Test requirements






- The respective fuses of Secondary Air Injection (AIR) Pump Motor -V101- must be OK:
- Fuel Pump (FP) relay -J17- must be OK.
- Secondary Air Injection (AIR) pump relay -J299- must be OK.
- Battery voltage must be at least 11.5 Volts.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- Ignition switched off.

Test sequence

- Disconnect 2-pin connector from Secondary Air Injection (AIR) Pump Motor -V101-.
- Remove pressure hose on Secondary Air Injection (AIR) pump motor (arrow).

NOTE: To disengage, compress the buttons at the hose coupling.






- Connect Secondary Air Injection (AIR) pump motor to B+ and Ground (GND) terminals of battery using respective adapter cables.

Secondary Air Injection (AIR) Pump Motor must start up and air must escape at compressed air connection (arrow).

If the motor does not start up, or no air or only very little air escapes.
- Disconnect connection between Secondary Air Injection (AIR) pump
- Replace Secondary Air Injection (AIR) pump motor -V101-.
- Erase DTC memory of Engine Control Module (ECM).
- Generate readiness code.

If motor starts, and air escapes.
- Disconnect connection between Secondary Air Injection (AIR) pump motor and battery.
- Remove Secondary Air Injection (AIR) pump relay from relay carrier.

Note: Remove battery Ground (GND) strap if tools are necessary for removal of relays or control modules from the relay carrier.
Obtain radio code for radios with anti-theft coding before disconnecting battery.
Do not use metallic tools to pry off relays from relay carrier. The terminals could conduct electricity.






- Check wire between terminal 8 of relay carrier and terminal 2 of 2-pin connector of Secondary Air Injection (AIR) pump motor for open circuit according to wiring diagram.
Wire resistance: max. 1.5 Ohms

- Check wire for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohms

- Check wire between 2-pin connector terminal 1 and Ground (GND) for open circuit according to wiring diagram.
Wire resistance: max. 1.5 Ohms

If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.