Diagnostic Procedure

1. Turn ignition switch OFF.
2. Check EVAP canister for cracks.

OK or NG 

1. OK (With CONSULT-II): GO TO 2.
2. OK (Without CONSULT-II): GO TO  3.
3. NG: Replace EVAP canister.

With CONSULT-II 

1. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.
2. Start engine and let it idle.
3. Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II.
4. Rev engine up to 2, 000 RPM.
   Fig 1: Locating EVAP Service Port

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5. Touch "Qd" and "Qu" on CONSULT-II screen to adjust "PURG VOL CONT/V" opening.

Fig 2: Reference Data

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Fig 3: Reading "PURG VOL CONT/V" In "ACTIVE TEST" Mode

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OK or NG 

1. OK: GO TO  7.
2. NG: GO TO  4.

Without CONSULT-II 

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 and install vacuum gauge.
   Fig 4: Locating EVAP Service Port

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum gauge indication when revving engine up to 2, 000 RPM.

   Vacuum should exist. 

6. Release the accelerator pedal fully and let idle.

   Vacuum should not exist. 

OK or NG 

1. OK: GO TO  7.
2. NG: GO TO  4.

1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection.

   Refer to "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

1. OK: GO TO 5.
2. NG: Repair it.

1. Disconnect purge hoses connected to EVAP service port A  and EVAP canister purge volume control solenoid valve B  .
   Fig 5: Identifying "A" And "B" Service Port

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2. Blow air into each hose and EVAP purge port C  .
   Fig 6: Blowing Air

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3. Check that air flows freely.

OK or NG 

1. OK (with CONSULT-II): GO TO 6.
2. OK (without CONSULT-II): GO TO  7.
3. NG: Repair or clean hoses and/or purge port.

With CONSULT-II 

1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II. Check that engine speed varies according to the valve opening.

   If OK, inspection end. If NG, go to following step.

   Fig 7: Reading "PURG VOL CONT/V" In "ACTIVE TEST" Mode

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3. Check air passage continuity.
   Fig 8: Checking Air Passage Continuity

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   Fig 9: Reference Data

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If NG, replace the EVAP canister purge volume control solenoid valve.

OK or NG 

1. OK: GO TO  8.
2. NG: Replace EVAP canister purge volume control solenoid valve.

Without CONSULT-II 

Check air passage continuity.

Fig 10: Checking Air Passage Continuity

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Fig 11: Reference Data

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If NG, replace the EVAP canister purge volume control solenoid valve.

OK or NG 

1. OK: GO TO 8.
2. NG: Replace EVAP canister purge volume control solenoid valve.

1. Turn ignition switch OFF.
2. Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.

OK or NG 

1. OK: GO TO 9.
2. NG: Repair it.

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.

   Water should not exist. 

OK or NG 

1. OK: GO TO 10.
2. NG: Replace EVAP control system pressure sensor.

Fig 12: Disconnecting EVAP Control System Pressure Sensor Harness Connector

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Refer to DTC Confirmation Procedure for DTC P0452, DTC P0452: EVAP CONTROL SYSTEM PRESSURE SENSOR  or P0453, DTC P0453: EVAP CONTROL SYSTEM PRESSURE SENSOR .

OK or NG 

1. OK: GO TO 11.
2. NG: Replace EVAP control system pressure sensor.

With CONSULT-II 

1. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
   Fig 13: Reading "VENT CONTROL/V" In "ACTIVE TEST" Mode

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2. Check air passage continuity and operation delay time.

Fig 14: Reference Data

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Operation takes less than 1 second. 

Without CONSULT-II 

1. Check air passage continuity and operation delay time under the following condition.

Fig 15: Checking Air Passage Continuity And Operation Delay Time

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Fig 16: Reference Data

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Operation takes less than 1 second. 

If NG or operation takes more than 1 second, clean valve using air blower or replace as necessary.

If portion B  is rusted, replace control valve.

Make sure new O-ring is installed properly. 

OK or NG 

1. OK (With CONSULT-II): GO TO 12.
2. OK (Without CONSULT-II): GO TO  13.
3. NG: Replace EVAP canister vent control valve.

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Turn ignition switch ON.
4. Select "DATA MONITOR" mode with CONSULT-II.
5. Check indication of "CLSD THL/P SW".

   Measurement must be made with closed throttle position switch installed in vehicle.

   Fig 17: Reference Data

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   If NG, adjust closed throttle position switch.

   Check the following items. Refer to "BASIC INSPECTION ".

   Fig 18: Reference Data

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6. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.

OK or NG 

1. OK: GO TO  14.
2. NG: Replace throttle position switch with throttle position sensor.

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF.
3. Disconnect closed throttle position switch harness connector.
4. Check continuity between closed throttle position switch terminals 4 and 5.

   Resistance measurement must be made with closed throttle position switch installed in vehicle.

   Fig 19: Check Continuity Between Closed Throttle Position Switch Terminals 4 And 5

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   Fig 20: Reference Data

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   If NG, adjust closed throttle position switch.

   Check the following items. Refer to "BASIC INSPECTION ".

   Fig 21: Reference Data

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5. If it is impossible to adjust closed throttle position switch in "Basic Inspection", replace closed throttle position switch.

OK or NG 

1. OK: GO TO 14.
2. NG: Replace throttle position switch with throttle position sensor.

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.

Refer to "EVAPORATIVE EMISSION LINE DRAWING ".

OK or NG 

1. OK: GO TO 15.
2. NG: Replace it.

Clean EVAP purge line (pipe and rubber tube) using air blower.

1. : GO TO 16.

Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END