With Generic Scan Tool

Secondary Air Injection (AIR) Valve, Checking

Secondary Air Injection (AIR) 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
- 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 Secondary Air Injection (AIR) valve.
Specified value: 25.0...35.0 Ohm

If specified value is not obtained:
- Replace Secondary Air Injection (AIR) Solenoid Valve -N112-, item 3 .
- 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. Readiness Code, Generating

If specified value is obtained:







- Connect test box to control module wiring harness, do not connect Engine Control Module (ECM), connecting test box for wiring test. Test Box, Connecting 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 Ohm
- Also check the wire for short circuit to B+ and Ground (GND).
Specified value: Infinite Ohm
- 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 Ohm

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