Nissan GT-R (R35) · Service Manual TRANSMISSION & DRIVELINE

P0746 CLUTCH A SOLENOID VALVE FUNCTION

TRANSMISSION: GR6Z30A

P0746

Description


The current signal from TCM controls the oil pressure to be applied to the clutch A (a clutch for even number gears) engaging or releasing of the clutch A.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P0840 is detected, first diagnose the DTC P0840. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC
 		Self-diagnosis item
 		DTC detection condition
 		Possible cause
P0746
 		Monitor clutch A solenoid valve oil pressure difference
 		A
 		A DTC is set if the clutch A pressure sensor value is higher than the clutch A pressure target value by 0.2 MPa (2.04 kg/cm2, 29 psi) or more.
  • Clutch A solenoid valve
  • Clutch A pressure sensor
  • Clutch A oil passage
  • Harness or connector
    (Open or short in the clutch A solenoid valve circuit)
    (Open or short in the clutch A pressure sensor circuit)
Clutch A solenoid valve oil pressure output low
 		B
 		A DTC is set if the difference between the engine speed (CAN signal) and clutch A speed sensor value is 1,000 rpm or more with clutch A.
  • Clutch A solenoid valve
  • Clutch A pressure sensor
  • Axis A feed pressure solenoid valve
  • Line pressure solenoid valve
  • Oil passage between line pressure and clutch A pressure
  • Harness or connector
    (Open or short in the clutch A solenoid valve circuit)
    (Open or short in the clutch A pressure sensor circuit)
    (Open or short in the axis A feed pressure solenoid valve circuit)
    (Open or short in the line pressure solenoid valve circuit)

 
 DTC CONFIRMATION PROCEDURE

 
 1.PREPARATION BEFORE OPERATION
 
 2.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION A
 
 3.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION B

Diagnosis Procedure


 
 1.CHECK CLUTCH A SOLENOID VALVE CIRCUIT
 
 2.CHECK CLUTCH A PRESSURE SENSOR CIRCUIT
 
 3.CHECK AXIS A FEED PRESSURE SOLENOID VALVE CIRCUIT
 
 4.CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT
 
 5.CHECK GROUND CONNECTION
 
 6.CHECK INTERMITTENT INCIDENT