Secondary Air Injection Solenoid Valve, Checking

Secondary Air Injection (AIR) Solenoid Valve (Vehicles with engine code AEG), checking

Solenoid valve is closed when no voltage is present.

Recommended special tools and equipment
- VAG1526 multimeter or VAG1715 multimeter
- VAG1594 connector test kit
- Wiring diagram

Test requirements






- Main fuses must be OK.
- Ignition switched off.

Test sequence






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





- Measure resistance between terminals of solenoid valve. Specified value: 25,0...35,0 ohms.

If specified value is not obtained:
- Replace Secondary Air Injection (AIR) Solenoid Valve -N112-, item 2 .
- Erase DTC memory of Engine Control Module (ECM), 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 33 + 2-pin connector terminal 2 for open circuit according to wiring diagram. Wire resistance: max: 1.5 ohms
- Also 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-.