Secondary Air Injection Sensor 1 - G609-, Checking: Notes

General Description

The Secondary Air Injection System Injects Air Into The Exhaust On A Cold-Start Of The Engine For 45 - 100 S And Serves To Quickly Heat The Catalytic Converter(s) For Improved Emissions. A Pressure Based Secondary Air Diagnostic Function Is Used. In This System, The Signal From The Secondary Air Injection Sensor 1 -G609- Is Evaluated By 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 automatic transmission, ensure the selector lever position is in "P".
Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .

Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	-- YES: GO TO: Step 2 Secondary Air Injection Sensor 1 - G609-, CHECKING - 2 . -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Secondary Air Injection Sensor 1 -G609- harness connector. IGNITION: ON. CHECK: Secondary Air Injection Sensor 1 -G609- harness connector terminals 1 to 3 for voltage. IGNITION: OFF. SPECIFIED VALUE: About 5.0 V. -- Was Value obtained?	-- YES: GO TO: Step 3 Secondary Air Injection Sensor 1 - G609-, CHECKING - 3 . -- NO: GO TO: Step 4 Secondary Air Injection Sensor 1 - G609-, CHECKING - 4 .
3	REMOVE: Engine Control Module -J623-. Refer to appropriate service information. CHECK: Secondary Air Injection Sensor 1 -G609- harness connector terminal 2 to the Engine Control Module -J623- harness connector T60 / 12 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Secondary Air Injection Sensor 1 -G609-. Refer to appropriate service information. GO TO: Step 5 Secondary Air Injection Sensor 1 - G609-, CHECKING - 5 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Secondary Air Injection Sensor 1 - G609-, CHECKING - 5 .
4	REMOVE: Engine Control Module -J623-. Refer to appropriate service information. CHECK: Secondary Air Injection Sensor 1 -G609- harness connector terminal 1 to the Engine Control Module -J623- harness connector T60 / 35 for resistance. CHECK: Secondary Air Injection Sensor 1 -G609- harness connector terminal 3 to the Engine Control Module -J623- harness connector T60 / 50 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: GO TO: Step 5 Secondary Air Injection Sensor 1 - G609-, CHECKING - 5 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Secondary Air Injection Sensor 1 - G609-, CHECKING - 5 .
5	Refer To The Final Procedure Below;