Sunday, January 19, 2020

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 145

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 145



3. Check the voltage between A/F sensor 1 harness connector and ground.



Is the inspection result normal?



YES - GO TO 4.



NO - GO TO 3.



3.DETECT MALFUNCTIONING PART



Check the following.



- Harness connectors E12, F3



- IPDM E/R harness connector E7



- 15 A fuse (No. 85)



- Harness for open or short between A/F sensor 1 and fuse



- Repair or replace harness or connectors.



4.CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT



1. Turn ignition switch OFF.



2. Disconnect ECM harness connector.



3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.



4. Also check harness for short to ground and short to power.



Is the inspection result normal?



YES - GO TO 5.



NO - Repair open circuit, short to ground or short to power in harness or connectors.



5.CHECK A/F SENSOR 1 HEATER



See: P Code Charts/P0031.



Is the inspection result normal?



YES - GO TO 7.



NO - GO TO 6.



6.REPLACE A/F SENSOR 1



Replace malfunctioning A/F sensor 1.



CAUTION:



- Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor;



use a new one.



- Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread



Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant



(commercial service tool).



- INSPECTION END



7.CHECK INTERMITTENT INCIDENT



Perform See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic



Overview/Trouble Diagnosis For Intermittent Incident/Description.



- Repair or replace malfunctioning part.



Component Inspection



1.CHECK AIR FUEL RATIO (A/F) SENSOR 1



1. Turn ignition switch OFF.



2. Disconnect A/F sensor 1 harness connector.