With Generic Scan Tool

Secondary Air Injection (AIR) valve, checking

Solenoid valve is closed when no voltage is present.

Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 Connector test set
- 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 -1- 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-, item 6 .
- 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. Test Box, Connecting For Wiring Test

Vehicles with engine code AHA





- 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

Vehicles with engine code ATQ





- Check wire between test box socket 44 + 2-pin connector terminal 2 for open circuit according to wiring diagram.
Wire resistance: max: 1.5 Ohms

Continuation for all vehicles
- Also check the wire for short circuit to B+ or Ground (GND).
Specified value: Infinity 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-.