Diagnostic Test

1. Turn ignition switch OFF.
2. Check ground connection E9. Refer to Ground Inspection in CIRCUIT INSPECTION .

Is the inspection result normal?

YES 

GO TO STEP 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 STEP 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.

   +		-	Voltage (Approx.)
   EVAP control system pressure sensor
   Connector	Terminal
   B36	3	Ground	5 V

Is the inspection result normal?

YES 

GO TO STEP 5  .

NO 

GO TO STEP 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
   B36	3	E32	177	Existed

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

Is the inspection result normal?

YES 

Perform the trouble diagnosis for ECM power supply 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
   B36	1	E32	200	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES 

GO TO STEP 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
   B36	2	E32	173	Existed

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

Is the inspection result normal?

YES 

GO TO STEP 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 STEP 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 STEP 9  .

NO 

Replace EVAP canister vent control valve. Refer to REMOVAL AND INSTALLATION .

Check EVAP control system pressure sensor. Refer to COMPONENT INSPECTION .

Is the inspection result normal?

YES 

GO TO STEP 10  .

NO 

Replace EVAP control system pressure sensor. Refer to REMOVAL AND INSTALLATION .

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 STEP 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 STEP 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.