Secondary Air Injection Sensor 1 -G609- / Secondary Air Injection Solenoid Valve -N112-, CHECKING: Notes

From January 2014: Secondary Air Injection Sensor 1 -G609- / Secondary Air Injection Solenoid Valve -N112-, CHECKING 

From December 2015: Secondary Air Injection Sensor 1 -G609- / Secondary Air Injection Solenoid Valve -N112-, CHECKING 

General Description 

The secondary air injection system sends air into the exhaust on a cold-start of the engine for about 45 - 100 sec. and serves to quickly heat the catalytic convertor(s) for improved emissions. A "pressure based secondary air diagnostics" function is used. In this system, the signal from Secondary Air Injection Sensor 1 -G609- is evaluated in the Engine Control Module -J623-. The injected air quantity is determined from the pressure level.

Special Tools And Workshop Equipment Required 

• Multimeter.
• Wiring Diagram.
• Scan Tool.

Test Requirements 

• Fuses OK.
• Battery voltage OK.
• Switch OFF all electrical and electronic accessories.
• Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
• Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
• Observe all safety precautions: SAFETY PRECAUTIONS .
• View clean working conditions: CLEAN WORKING CONDITIONS .