Nissan GT-R (R35) · Service Manual ENGINE

P0643 SENSOR POWER SUPPLY

VR38

P0643

DTC Logic

 
 DTC DETECTION LOGIC

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0643
 		Sensor power supply circuit short
 		ECM detects that the voltage of power source for sensor is excessively low or high.
  • Harness or connectors
    (APP sensor 1 circuit is shorted.)
    (TP sensor circuit is shorted.)
    [CMP sensor (PHASE) (bank 1) circuit is shorted.]
    (Turbocharger boost sensor circuit is shorted.)
    (EVAP control system pressure sensor circuit is shorted.)
  • Accelerator pedal position sensor
  • Throttle position sensor
  • Camshaft position sensor (PHASE) (bank 1)
  • Turbocharger boost sensor
  • EVAP control system pressure sensor

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK GROUND CONNECTION
 
 2.CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
 
 3.CHECK SENSOR POWER SUPPLY CIRCUITS
 
 4.CHECK COMPONENTS
 
 5.CHECK TP SENSOR
 
 6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
 
 7.CHECK APP SENSOR
 
 8.REPLACE ACCELERATOR PEDAL ASSEMBLY
 
 9.CHECK INTERMITTENT INCIDENT