Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect EVAP control system pressure sensor harness connector.
3. Check sensor harness connector for water.

   Water should not exist.

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace harness connector.

1. Turn ignition switch ON.
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

   +		-	Voltage (Approx.)
   EVAP control system pressure sensor
   Connector	Terminal
   C52	3	Ground	5 V

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   EVAP control system pressure sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   C52	3	E16	135	Existed

4. Also check harness for short to ground and to power.

Is the inspection result normal?

YES

Perform the trouble diagnosis for power supply circuit.

NO

Repair or replace malfunctioning part.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   EVAP control system pressure sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   C52	1	E16	158	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 5.

NO

Repair or replace malfunctioning part.

1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

   EVAP control system pressure sensor		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   C52	2	E16	131	Existed

2. Also check harness for short to ground and to power.

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace malfunctioning part.

1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.

Is the inspection result normal?

YES

GO TO 7.

NO

Clean the rubber tube using an air blower, repair or replace rubber tube.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 8.

NO

Replace EVAP canister vent control valve. Refer to Exploded View .

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 9.

NO

Replace EVAP control system pressure sensor. Refer to Exploded View .

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2. Check if water will drain from the EVAP canister.

   Courtesy of NISSAN NORTH AMERICA, INC.

Does water drain from EVAP canister?

YES

GO TO 10.

NO

INSPECTION END

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 1.9 kg (4.2 lb).

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 11.

Check the following.

• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

Repair hose or replace EVAP canister. Refer to Removal and Installation .