Diagnostic Procedure

Check rubber tube connected to the sensor for clogging, vent, kink, disconnection or improper connection.

OK or NG 

1. OK : GO TO 2.
2. NG : Reconnect, repair or replace.

1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.

1. : GO TO 3.

Fig 1: Tightening Engine Ground Screws

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

   Water should not exist. 

OK or NG 

1. OK : GO TO 4.
2. NG : Repair or replace harness connector.

Fig 2: Checking Sensor Harness Connector For Water

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1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor terminal 3 and engine ground with CONSULT-II or tester.

   Voltage : Approximately 5V 

OK or NG 

1. OK : GO TO  6.
2. NG : GO TO 5.

Fig 3: Checking Voltage Between EVAP Control System

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Check the following.

• Harness connectors C1, M67
• Harness connectors M59, F27
• Harness for open or short between EVAP control system pressure sensor and ECM
  1. : Repair harness or connectors.

1. Turn ignition switch OFF.
2. Check harness continuity between EVAP control system pressure sensor terminal 1 and engine ground. Refer to WIRING DIAGRAM .

   Continuity should exist. 

3. Also check harness for short to power.

OK or NG 

1. OK : GO TO  8.
2. NG : GO TO 7.

Check the following.

• Harness connectors C1, M67
• Harness connectors M81, F36
• Harness for open or short between EVAP control system pressure sensor and ECM
  1. : Repair open circuit or short to power in harness or connectors.

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 62 and EVAP control system pressure sensor terminal 2.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

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

OK or NG 

1. OK (With CONSULT-II) : GO TO  10.
2. OK (Without CONSULT-II) : GO TO  11.
3. NG : GO TO 9.

Check the following.

• Harness connectors C1, M67
• Harness connectors M59, F27
• Harness for open or short between EVAP control system pressure sensor and ECM
  1. : Repair open circuit or short to power in harness or connectors.

With CONSULT-II 

1. Start engine.
2. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II. Check that engine speed varies according to the valve opening.

OK or NG 

1. OK : GO TO  12.
2. NG : GO TO 11.

Fig 4: Scan Tool Display - Active Test

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With CONSULT-II 

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

Fig 5: Checking EVAP Canister Purge Volume Control Solenoid Valve (With Consult-II)

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Without CONSULT-II 

Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.

Fig 6: Checking EVAP Canister Purge Volume Control Solenoid Valve (Without Consult-II)

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OK or NG 

1. OK : GO TO 12.
2. NG : Replace EVAP canister purge volume control solenoid valve.

1. Turn ignition switch OFF.
2. Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.

OK or NG 

1. OK : GO TO 13.
2. NG : Repair it.

1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B  of EVAP canister vent control valve for being rusted.

OK or NG 

1. OK : GO TO 14.
2. NG : Replace EVAP canister vent control valve.

Fig 7: Removing EVAP Canister Vent Control Valve From EVAP Canister

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With CONSULT-II 

1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform "VENT CONTROL/V" in "ACTIVE TEST" mode.
4. Check air passage continuity and operation delay time.

Fig 8: Checking EVAP Canister Vent Control Valve-II (With Consult-II)

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Without CONSULT-II 

Check air passage continuity and operation delay time under the following condition.

Fig 9: Condition Chart

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Fig 10: Checking EVAP Canister Vent Control Valve-II (Without Consult-II)

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Operation takes less than 1 second. 

OK or NG 

1. OK : GO TO  16.
2. NG : GO TO 15.

1. Clean the air passage (Portion A  to B  ) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 13 again.

OK or NG 

1. OK : GO TO 16.
2. NG : Replace EVAP canister vent control valve.

1. Remove EVAP control system pressure sensor with its harness connector connected.
   Fig 11: Removing EVAP Control System Pressure Sensor

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2. Remove hose from EVAP control system pressure sensor.
3. Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.
   CAUTION:

   • Always calibrate the vacuum pump gauge when using it.
   • Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or over 101.3 kPa (760 mmHg, 29.56 inHg) of pressure.
4. Check output voltage between ECM terminal 62 and engine ground.
   Fig 12: Voltage Chart

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   Fig 13: Checking Output Voltage Between ECM Terminal And Engine Ground

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   CAUTION: Discard any EVAP control system pressure sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.

OK or NG 

1. OK : GO TO 17.
2. NG : Replace EVAP control system pressure sensor.

Check obstructed water separator and rubber tube to EVAP canister vent control valve and clean the rubber tube using air blower.

Check water separator.

1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A  and C  are not clogged by blowing air into B  with A  , and then C  plugged.
5. In case of NG in items 2 - 4, replace the parts.

• Do not disassemble water separator. 

OK or NG 

1. OK : GO TO 18.
2. NG : Clean, repair or replace rubber tube and/or water separator.

Fig 14: Checking Rubber Tube For Clogging

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

Yes or No 

1. Yes : GO TO 19.
2. No : GO TO  21.

Fig 15: Identifying EVAP Canister

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Weigh the EVAP canister with EVAP canister vent control valve attached.

The weight should be less than 1.8 kg (4.0 lb). 

OK or NG 

1. OK : GO TO  21.
2. NG : GO TO 20.

Check the following.

1. Visually check the EVAP canister for damage.
2. Check hose connection between EVAP canister and water separator for clogging and poor connection.
   1. : Repair hose or replace EVAP canister or water separator.

Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END.