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
- VA.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 connector test kit
- Wiring diagram
Test requirements
- The respective fuses of Secondary Air Injection (AIR) Solenoid Valve -N112- must be OK.
- Fuel Pump (FP) Relay -J17- must be OK, check.
- 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
- Check 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-.
- 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. Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
- Check wires to control module according to wiring diagram.
Check wires to control module
- Connect test box to control module wiring harness. connect test box for wiring test. Test Box, Connecting For Wiring Test
Vehicles with engine code APH, AWP, AWV
- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 2 + socket 9
Wire resistance: max. 1.5 Ohms
Vehicles with engine code BKF, BNU
- Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Terminal 2 + socket 114
Wire resistance: max. 1.5 Ohms
Continue for all vehicles
- 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
- 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. Monitors, Trips, Drive Cycles and Readiness Codes
If no malfunctions are found in wires:
- Replace Motronic Engine Control Module (ECM) -J220-.