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Diagnosis Procedure
1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
  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?
.
Repair or replace harness connector.
 
2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY
  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
    ConnectorTerminal
    C51 3Ground5 V
Is the inspection result normal?
.
.
 
3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
  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.
    +−Continuity
    EVAP control system pressure sensorECM
    ConnectorTerminalConnectorTerminal
    C51 3E16133Existed
  4. Also check harness for short to ground and to power.
Is the inspection result normal?
Perform the trouble diagnosis for power supply circuit.
Repair or replace error-detected parts
 
4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT
  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.
    +−Continuity
    EVAP control system pressure sensorECM
    ConnectorTerminalConnectorTerminal
    C51 1E16155Existed
  4. Also check harness for short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT
  1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.
    +−Continuity
    EVAP control system pressure sensorECM
    ConnectorTerminalConnectorTerminal
    C51 2E16129Existed
  2. Also check harness for short to ground and to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
6.CHECK RUBBER TUBE
  1. Disconnect rubber tube connected to EVAP canister vent control valve.
  2. Check the rubber tube for clogging.
Is the inspection result normal?
.
Clean the rubber tube using an air blower, repair or replace rubber tube.
 
7.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to Component Inspection.
Is the inspection result normal?
.
Replace EVAP canister vent control valve. Refer to Removal and Installation.
 
8.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
  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.
Does water drain from EVAP canister?
.
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
 
9.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 2.3 kg (5.1 lb).
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
.
 
10.DETECT MALFUNCTIONING PART
Check the following.
  • EVAP canister for damage
  • EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
Is the inspection result normal?
Replace EVAP control system pressure sensor. Refer to Removal and Installation.
Repair hose or replace EVAP canister. Refer to Removal and Installation.