Nissan GT-R (R35) · Service Manual ENGINE

P0448 EVAP CANISTER VENT CONTROL VALVE

VR38

P0448

Description


The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.

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This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows “EVAP Control System” diagnosis.

DTC Logic

 
 DTC DETECTION LOGIC

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0448
 		EVAP canister vent control valve close
 		EVAP canister vent control valve remains closed under specified driving conditions.
  • EVAP canister vent control valve
  • EVAP control system pressure sensor and the circuit
  • Blocked rubber tube to EVAP canister vent control valve
  • EVAP canister is saturated with water

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK RUBBER TUBE
 
 2.CHECK EVAP CANISTER VENT CONTROL VALVE
 
 3.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
 
 4.CHECK EVAP CANISTER
 
 5.DETECT MALFUNCTIONING PART
 
 6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
 
 7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
 
 8.CHECK INTERMITTENT INCIDENT

Component Inspection


 
 1.CHECK EVAP CANISTER VENT CONTROL VALVE-I
 
 2.CHECK EVAP CANISTER VENT CONTROL VALVE-II
 
 3.CHECK EVAP CANISTER VENT CONTROL VALVE-III