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.G 1526 portable 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) Solenoid Valve -N112- must be OK
- Ignition switched off.

Test sequence







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







- 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). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If specified value is obtained:
- Connect test box to control module wiring harness. connect test box for wiring test.







- Check wire between test box socket 9+2-pin connector terminal 2 for open circuit according to wiring diagram.

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-.