Diagnosis Procedure

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check that water is not inside connectors.

   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.

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

   Is the inspection result normal? 

   YES: GO TO  5.

   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
   B36	3	E16	107	Existed

   Is the inspection result normal? 

   YES: GO TO 4.

   NO: Repair open circuit.

Check sensor power supply 2 circuit. Refer to "DIAGNOSIS PROCEDURE ".

Is the inspection result normal? 

YES: Perform the trouble diagnosis for power supply circuit.

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	E16	112	Existed

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

   Is the inspection result normal? 

   YES: GO TO 6.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

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	E16	102	Existed

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

   Is the inspection result normal? 

   YES: GO TO 7.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

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.

Check EVAP canister vent control valve. 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. Refer to "EXPLODED VIEW ".
2. Check if water will drain from the EVAP canister.

   Does water drain from the EVAP canister? 

   YES: GO TO 11.

   NO: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

   Fig 1: Checking EVAP Canister For Water Saturation

   Courtesy of NISSAN NORTH AMERICA, INC.

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: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

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. Refer to "EXPLODED VIEW ".