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: Heated Oxygen Sensor -G39- harness connector. CHECK: Heated Oxygen Sensor -G39- component connector terminals 3 to 4 for resistance. SPECIFIED VALUE: 2 - 4 Ω (@ 25° C). -- Was Value obtained?	-- YES: GO TO Step 3. -- NO: REPLACE: Heated Oxygen Sensor -G39-. Refer to appropriate repair information. GO TO: Step 9.
3	IGNITION: ON. CHECK: Heated Oxygen Sensor -G39- harness connector terminal 4 to ground for voltage. SPECIFIED VALUE: Battery voltage. IGNITION: OFF. -- Was Value obtained?	-- YES: GO TO Step 5. -- NO: GO TO Step 4. DIAGNOSTIC MODE 06 - READ TEST RESULTS FOR SPECIFIC DIAGNOSTIC FUNCTIONS 2015
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: Heated Oxygen Sensor -G39- harness connector. CONNECT: Scan Tool. START: Engine and 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: Heated Oxygen Sensor -G39- harness connector. START: Engine and let Idle. CHECK: Heated Oxygen Sensor -G39- component connector terminals 5 to 6 for voltage. SPECIFIED VALUE: 0.0 V to 1.0 V. IGNITION: OFF. -- Was Value obtained?	-- YES: GO TO: Step 8. -- NO: REPLACE Heated Oxygen Sensor -G39-. Refer to appropriate repair information. GO TO: Step 9.
8	REMOVE: Engine Control Module -J623-. Refer to appropriate repair information. CHECK: Heated Oxygen Sensor - G39- harness connector terminal 5 to the Engine Control Module -J623- harness connector T94 / 81 for resistance. CHECK: Heated Oxygen Sensor - G39- harness connector terminal 6 to the Engine Control Module -J623- harness connector T94 / 82 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values 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.