Monday, July 29, 2019

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 311

2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 311



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



Overview/Trouble Diagnosis For Intermittent Incident/Description.



Is the inspection result normal?



YES - GO TO 6.



NO - Repair or replace malfunctioning part.



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



P0152



P0132, P0152 A/F SENSOR 1



Description



The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. The sensor element of the A/F sensor 1 is composed an electrode layer,



which transports ions. It has a heater in the element.



The sensor is capable of precise measurement = 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a



clear, continuous signal throughout a wide range.



The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is applied voltage, and this current relative



oxygen density in lean. Also this current relative hydrocarbon density in rich.



Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this electrode layer of current. In addition, a heater is integrated in the sensor to



ensure the required operating temperature of approximately 800锟紺 (1,472锟紽).



DTC Logic



DTC DETECTION LOGIC



To judge the malfunction, the diagnosis checks that the air fuel ratio (A/F) signal computed by ECM from the A/F sensor 1 signal is not



inordinately high.



DTC CONFIRMATION PROCEDURE