Secondary Air Injection (AIR) Valve, Checking

Secondary Air Injection (AIR) valve, checking

Solenoid valve is closed when no voltage is present.

Recommended special tools and equipment
- V.A.G1526 multimeter or V.A.G1715 multimeter
- V.A.G1594 connector test kit
- Wiring diagram

Test requirements






- The respective fuses of Secondary Air Injection (AIR) Solenoid Valve -N112- must be OK:
- Ignition switched off.

Test sequence

- Disconnect 2-pin connector from Secondary Air Injection (AIR) Solenoid Valve -N112-.

checking resistance






- Measure resistance between terminals of solenoid valve.
Specified value: 25.0 to 35.0 ohms.

If specified value is not obtained:
- Replace Secondary Air Injection (AIR) Solenoid Valve -N112-
- Erase DTC memory of Engine Control Module (ECM).
- Generate readiness code.

If specified value is obtained:
- Check wires according to wiring diagram.

Checking wiring

- Connect test box to control module wiring harness.






- Check wire between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 2 + socket 50
Wire resistance: max: 1.5 ohms

- Check the wire for short circuit to B+ and Ground (GND).
Specified value: infinite ohms

- Check wire between 2-pin connector terminal 1 and the Fuel Pump (FP) Relay -J17- 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-.