2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 530
7.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
- EVAP canister vent control valve is installed properly. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Evaporative Emission Control Canister/Service and Repair/Removal and Replacement/Removal and Installation.
- EVAP canister vent control valve. See: P Code Charts/P0447.
Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace EVAP canister vent control valve and O-ring.
8.CHECK FOR EVAP LEAK
See: Powertrain Management/Emission Control Systems/Evaporative Emissions System/Testing and Inspection.
Is there any leak in EVAP line?
YES - Repair or replace malfunctioning part.
NO-1 - With CONSULT-III: GO TO 9.
NO-2 - Without CONSULT-III: GO TO 10.
9.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode.
4. Touch "Qu" on CONSULT-III screen to increase "PURG VOL CONT/V" opening to 100%.
5. Check vacuum hose for vacuum.
Vacuum should exist.
Is the inspection result normal?
YES - GO TO 12.
NO - GO TO 11.
10.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 11.
11.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. See: Powertrain Management/Emission Control Systems/Evaporative Emissions
System/Description and Operation/System Diagram.
Is the inspection result normal?
YES-1 - With CONSULT-III: GO TO 12.
YES-2 - Without CONSULT-III: GO TO 13.
NO - Repair or reconnect the hose.
12.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-III. Check that engine speed varies according to the valve
opening.
Does engine speed vary according to the valve opening?
YES - GO TO 14.
NO - GO TO 13.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
See: P Code Charts/P0443.
Is the inspection result normal?
YES - GO TO 14.
NO - Replace EVAP canister purge volume control solenoid valve.
14.CHECK FUEL TANK TEMPERATURE SENSOR
See: P Code Charts/P0181.
Is the inspection result normal?
YES - GO TO 15.
NO - Replace "fuel level sensor unit and fuel pump (main)".
15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
See: P Code Charts/P0451.
Is the inspection result normal?
YES - GO TO 16.
NO - Replace EVAP control system pressure sensor.
