DTC Description

This diagnosis detects clogs in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve. ECM controls EVAP control system as below. ECM monitors EVAP line pressure change to diagnose if there is no clogging between EVAP canister and fuel tank.

1. ECM closes EVAP canister vent control valve while the engine is running.
2. ECM controls EVAP canister purge volume control solenoid valve. (Fuel vapor in EVAP line is absorbed by intake manifold pressure)
3. ECM monitors EVAP line pressure change using EVAP control system pressure sensor. (When there is clogging in EVAP line, the path to the space of fuel tank is partially blocked. As a result, the pressure in EVAP line drops faster.)

Courtesy of NISSAN NORTH AMERICA, INC.

DTC DETECTION LOGIC 

POSSIBLE CAUSE 

• Fuel tank vent line (bent, clogs, etc.)
• EVAP canister

FAIL-SAFE 

Not applicable

DTC CONFIRMATION PROCEDURE 

1. PRECONDITIONING 

   If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

   1. Turn ignition switch OFF and wait at least 10 seconds.
   2. Turn ignition switch ON.
   3. Turn ignition switch OFF and wait at least 10 seconds.

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   GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE 
   1. Drive the vehicle under the following conditions for at least 5 minutes in total.

      Engine coolant temperature	70°C (158°F) or more
      Vehicle speed	60 - 100 km/h (37 - 62 MPH)

      NOTE: Keep the accelerator pedal as possible during cruising.
   2. Check DTC.

   Is 1st trip DTC detected?

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   Refer to DTC Diagnosis Procedure .

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   To check malfunction symptom before repair: Refer to Intermittent Incident .

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   Confirmation after repair: INSPECTION END