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Home >> Suzuki >> 2009 >> Equator Base, 4D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (VQ40DE) - (2 Of 5) >> DTC P0447: EVAP Canister Vent Control Valve >> Diagnosis Procedure
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Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step Action YES NO
1  INSPECTION START 
Do you have SDT?
Yes or No 		 GO TO 2. GO TO 3.
2  CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT 
With SDT 
  1. Turn ignition switch OFF and then ON.
  2. Select "VENT CONTROL/V" in "Active test" mode with SDT.
  3. Touch "ON/OFF" on SDT screen.
  4. Check for operating sound of the valve.

    Clicking noise should be heard. 


OK or NG 		 GO TO 7. GO TO 3.
3  CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT 
  1. Turn ignition switch OFF.
  2. Disconnect EVAP canister vent control valve (1) harness connector.
G06441467G06441468Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  • EVAP control system pressure sensor (2)
  • Drain filter (3)
  • EVAP canister (4)
  • <==: Vehicle front

  1. 3. Turn ignition switch ON.
  2. 4. Check voltage between EVAP canister vent control valve terminal 1 and ground with SDT or tester.
G06441467G06441468Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Battery voltage 
OK or NG 		 GO TO 5. GO TO 4.
4  DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connectors E41, C1
  • Harness for open or short between EVAP canister vent control valve and IPDM E/R
 Repair harness or connectors.  
5  CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between ECM terminal 117 and EVAP canister vent control valve terminal 2. Refer to WIRING DIAGRAM .

    Continuity should exist. 

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

OK or NG 		 GO TO 7. GO TO 6.
6  DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connectors C1, E41
  • Harness for open or short between EVAP canister vent control valve and ECM
 Repair open circuit or short to ground or short to power in harness or connectors.  
7  CHECK RUBBER TUBE FOR CLOGGING 
  1. Disconnect rubber tube connected to EVAP canister vent control valve.
  2. Check the rubber tube for clogging.

OK or NG 		 GO TO 8. Clean the rubber tube using an air blower.
8  CHECK DRAIN FILTER 
Refer to [P0447 EVAP CANISTER VENT CONTROL VALVE ].
OK or NG 		 GO TO 9. Replace drain filter.
9  CHECK EVAP CANISTER VENT CONTROL VALVE 
Refer to [P0447 EVAP CANISTER VENT CONTROL VALVE ].
OK or NG 		 GO TO 10. Replace EVAP canister vent control valve.
10  CHECK INTERMITTENT INCIDENT 
Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]		 INSPECTION END   
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