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 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram

Test requirements







- Fuses in E-box (plenum chamber, left) must be OK







- The respective fuses of Secondary Air Injection (AIR) Solenoid Valve -N112- must be OK
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.

Test sequence







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

Checking resistance







- Measure resistance between terminals of solenoid valve.
Specified value: 55.0 to 65.0 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 04 - Erase DTC Memory
- Generate readiness code. Readiness Code

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

Checking wiring
- Connect test box to control module wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test







- 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

- Check wire for short circuit to B+ and Ground (GND).

Specified value: infinity ohm

- Check wire between 2-pin connector terminal 1 and the B+ connection in wiring harness for open circuit according to wiring diagram.

Wire resistance: max. 1.5 ohms

- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Readiness Code

If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.