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Home >> Suzuki >> 2009 >> Equator Base, 4D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (VQ40DE) - (4 Of 5) >> DTC P0075, P0081: IVT Control Solenoid Valve >> Diagnosis Procedure
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Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step Action YES NO
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT 
  1. Turn ignition switch OFF.
  2. Disconnect intake valve timing control solenoid valve harness connector.
G06441253G06441254Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 3. Turn ignition switch ON.
  2. 4. Check voltage between intake valve timing control solenoid valve terminal 2 and ground with SDT or tester.
G06441253G06441254Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Battery voltage 
OK or NG 
GO TO 3. GO TO 2.
DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connectors E2, F32
  • Harness connectors F26, F225 (bank 1)
  • Harness for open or short between intake valve timing control solenoid valve and IPDM E/R
  • Harness for open or short between intake valve timing control solenoid valve and ECM
Repair harness or connectors.  
CHECK INTAKE VALVE TIMING CONTROL SOLENOID 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 11 (bank 1) or 10 (bank 2) and intake valve timing control solenoid valve terminal 1. Refer to WIRING DIAGRAM .

    Continuity should exist. 

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

OK or NG 
GO TO 5. GO TO 4.
DETECT MALFUNCTIONING PART 
Check the following.
  • Harness connectors F26, F225 (bank 1)
  • Harness for open and short between ECM and intake valve timing control solenoid valve
Repair open circuit or short to ground or short to power in harness or connectors.  
CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE 
Refer to [P0075, P0081 IVT CONTROL SOLENOID VALVE ].
OK or NG 
GO TO 6. Replace malfunctioning intake valve timing control solenoid valve.
CHECK INTERMITTENT INCIDENT 
Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]
INSPECTION END