Secondary Air Injection Solenoid Valve, Checking

Secondary Air Injection Solenoid Valve, Checking

Secondary Air Injection (AIR) valve is closed when no voltage is present.

Recommended Special Tools, Workshop Equipment, Testers, Measuring Instruments and Auxiliary Items
- V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
- Adapter set V. A. G 1594
- Wiring diagram

Test Conditions
- 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 Secondary Air Injection (AIR) Solenoid Valve contacts.







Specified value: 25.0 to 35.0 Ohms

If the specification is not obtained:
- Replace Secondary Air Injection (AIR) Solenoid Valve N112,.
- Erase DTC memory of ECM. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Generate Readiness Code

If specified value is reached, check wire connection to ECM.
- Connect test box to ECM wiring harness. Test Box, Connecting For Wiring Test

The Engine Control Module (ECM) remains disconnected.
- Check wire between test box and 2-pin connector for open circuit according to wiring diagram.
Terminal 2 + Socket 9







Wiring resistance: max. 1.5 Ohms
- Also check the wire for short circuit to B+ and 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.

Wiring resistance: max. 1.5 Ohms

If no malfunction is found in wires:
- Replace Motronic Engine Control Module (ECM) J220.
- Erase DTC memory of ECM. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Generate Readiness Code