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. NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector. CHECK: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector terminals 1 to 2 for resistance. SPECIFIED VALUE: 9 - 11 Ω (@ 25° C). -- Was Value obtained?	YES: GO TO Step 3. NO: REPLACE: Oxygen Sensor 2 After Catalytic Converter -G131-. Refer to appropriate repair information. GO TO: Step 9.
3	IGNITION: ON. DISCONNECT: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector. CHECK: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector terminal 1 to ground. SPECIFIED VALUE: Battery voltage. IGNITION: OFF. -- Was Value obtained?	YES: GO TO Step 5. NO: GO TO Step 4.
4	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. REPLACE: any open fuses.	GO TO: Step 9.
5	RECONNECT: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector. CONNECT: Scan Tool. START: Engine, let Idle. Perform the function test located in diagnostic mode 06. Refer to DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS 2015 . SPECIFIED VALUE: Mode 6 Pass. IGNITION: OFF. -- Were Values obtained?	YES: GO TO Step 6. NO: GO TO Step 7.
6	FAULT: Is intermittent. 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 9.
7	DISCONNECT: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector. IGNITION: ON. CHECK: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector terminals 3 to 4 for voltage. SPECIFIED VALUE: 0.1 V to 1.0 V. IGNITION: OFF. -- Was Value obtained?	YES: GO TO: Step 9. NO: REPLACE Oxygen Sensor 2 After Catalytic Converter -G131-. Refer to appropriate repair information. GO TO: Step 8.
8	REMOVE: Engine Control Module (ECM) -J623-. Refer to appropriate repair information for removal / installation procedures. CHECK: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector terminal 3 to the Engine Control Module (ECM) -J623- harness connector T94 / 54 for resistance. CHECK: Oxygen Sensor 2 After Catalytic Converter -G131- harness connector terminal 4 to the Engine Control Module (ECM) -J623- harness connector T94 / 55 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	YES: REPLACE: Engine Control Module -J623-. Refer to appropriate repair information. GO TO: Step 9. 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 9.
9	Final Procedure Perform a road test to verify repair. Do any DTC's return:	YES: Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY . Perform the diagnostic procedure for that DTC. NO: Repair is complete. Generate readiness code. Refer to READINESS CODE . Return vehicle to Customer.