Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check ground connection E191. Refer to Ground Inspection in Circuit Inspection .

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace ground connection.

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

   Water should not exist.

Is the inspection result normal?

YES

GO TO 3.

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.

   EVAP control system pressure sensor		Ground	Voltage (V)
   Connector	Terminal
   B108	3	Ground	Approx. 5

Is the inspection result normal?

YES

GO TO  5.

NO

GO TO 4.

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
   B108	3	E152	177	Existed

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

Is the inspection result normal?

YES

Check sensor power supply 3 circuit. Refer to Diagnosis Procedure .

NO

Repair or replace error-detected parts.

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
   B108	1	E152	200	Existed

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

Is the inspection result normal?

YES

GO TO 6.

NO

Repair or replace error-detected parts.

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
   B108	2	E152	173	Existed

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

Is the inspection result normal?

YES

GO TO 7.

NO

Repair or replace error-detected parts.

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 8.

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 9.

NO

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

Check EVAP control system pressure sensor. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 10.

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.

   : EVAP canister vent control valve

Does water drain from EVAP canister?

YES

GO TO 11.

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 2.1 kg (4.6 lb).

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 12.

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.