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Home >> Suzuki >> 2009 >> Equator Base, 4D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (VQ40DE) - (3 Of 5) >> DTC P0643: Sensor Power Supply >> Diagnosis Procedure
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Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step Action YES NO
CHECK GROUND CONNECTIONS 
  1. Turn ignition switch OFF.
  2. Loosen and retighten three ground three screws on the body. Refer to [POWER SUPPLY AND GROUND CIRCUIT CHECK ].
G06441529Courtesy of SUZUKI OF AMERICA CORP.

OK or NG 
GO TO 2. Repair or replace ground connections.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT 
  1. Disconnect accelerator pedal position (APP) sensor harness connector.
G06441530G06441531Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

  1. 2. Turn ignition switch ON.
  2. 3. Check voltage between APP sensor terminal 2 and ground with SDT or tester.
G06441530G06441531Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.

Voltage: Approximately 5V 


OK or NG 
GO TO 5. GO TO 3.
CHECK SENSOR POWER SUPPLY CIRCUITS 
Check harness for short to power and short to ground, between the following terminals.
OK or NG 
GO TO 4. Repair short to ground or short to power in harness or connectors.
CHECK COMPONENTS 
Check the following.

OK or NG 
GO TO 5. Replace malfunctioning component.
CHECK APP SENSOR 
Refer to [P2122, P2123 APP SENSOR ].
OK or NG 
GO TO 7. GO TO 6.
REPLACE ACCELERATOR PEDAL ASSEMBLY 
  1. Replace accelerator pedal assembly.
  2. Perform "Accelerator Pedal Released Position Learning" in [PROCEDURE AFTER REPLACING ECM ].
  3. Perform "Throttle Valve Closed Position Learning" in [PROCEDURE AFTER REPLACING ECM ].
  4. Perform "Idle Air Volume Learning" in [PROCEDURE AFTER REPLACING ECM ].
INSPECTION END   
CHECK INTERMITTENT INCIDENT 
Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]
INSPECTION END