Dtc Description

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.)

DTC DETECTION LOGIC

POSSIBLE CAUSE

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

• EVAP canister

FAIL-SAFE

Not applicable

Confirmation Procedure

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.

   >>

   GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

   1. Drive the Nissan Sentra vehicle under the following conditions for at least 5 minutes in total.

      Engine coolant temperature	70°C (158°F) or more
      Nissan Sentra 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?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

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

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

1. CHECK EVAP CONTROL SYSTEM FOR CLOGGING

   With CONSULT

   1. Turn ignition switch OFF.

   2. Disconnect EVAP purge hose from EVAP canister purge volume control valve.

      

   3. Disconnect fuel tank vent hose from EVAP canister.

   4. Turn ignition switch ON (engine stopped).

   5. On CONSULT screen, select “ENGINE” >> “Work support” >> “EVAP SYSTEM CLOSE”.

   6. Apply positive pressure (not vacuum) to the hose end using Vacuum/Pressure Hand Pump according to CONSULT screen instructions.

   7. Check that the applied pressure does not increase and that pressure is not held.

   Is the inspection result normal?

   YES >>

   Check fuel tank vent line for clogs, vent and installation condition.

   NO >>

   Replace EVAP canister. Refer to Removal and Installation.