P0731 SLEEVE B1 FUNCTION

NOTE：

• If DTC P0700 is detected, first diagnose the DTC P0700. Refer to DTC Logic (GT-R certified NISSAN dealer).
  
• If DTC P2765 is detected, first diagnose the DTC P2765. Refer to DTC Logic (GT-R certified NISSAN dealer).
  

• *1: A DTC is displayed when C or D in the DTC detection conditions is detected.
  
• *2: A DTC is displayed when F or G in the DTC detection conditions is detected.
  
• *3: A DTC is displayed when H, I, or J in the DTC detection conditions is detected.
  

DTC	Self-diagnosis name	DTC detection condition		Possible cause
P0731	1st-Reverse position sensor voltage	A	A DTC is set if the 1st-Reverse position sensor 1 or 1st-Reverse position sensor 2 voltage value received by TCM is more than 4,700 mV. A DTC is set if the 1st-Reverse position sensor 1 or 1st-Reverse position sensor 2 voltage value received by TCM is less than 300 mV.	1st-Reverse position sensor 1 1st-Reverse position sensor 2 TCM Harness or connector (Open or short in the 1st-Reverse position sensor 1 circuit) (Open or short in the 1st-Reverse position sensor 2 circuit)
	Sleeve B1 function (long time release)	B	A DTC is set if the status of the sleeve B1 position of more than 1.3 mm (0.051 in) is detected for a certain period of time when the sleeve B1 position target is neutral. A DTC is set if the status of the sleeve B1 position of less than −1.3 mm (−0.051 in) is detected for a certain period of time when the sleeve B1 position target is neutral.	1st-Reverse position sensor 1 Shift solenoid valve 3 Shift solenoid valve 4 Sequence solenoid valve Axis B feed pressure solenoid valve Harness or connector (Open or short in the 1st-Reverse position sensor 1 circuit) (Open or short in the shift solenoid valve 3 circuit) (Open or short in the shift solenoid valve 4 circuit) (Open or short in the sequence solenoid valve circuit) (Open or short in the axis B feed pressure solenoid valve circuit)
	Sleeve B1 function (long time engagement)*1	C	A DTC is set if the status of the sleeve B1 position of less than 1.8 mm (0.071 in) is detected for a certain period of time when the sleeve B1 position target is on the 1st gear side.
		D	A DTC is set if the status of the sleeve B1 position of more than 1.8 mm (0.071 in) is detected for a certain period of time when the sleeve B1 position target is on the reverse gear side.
P0731	Sleeve B1 function (poor neutral hold)	E	A DTC is set if the status of the sleeve B1 position of more than 1.7 mm (0.067 in) or less than −1.7 mm (−0.067 in) is detected for a certain period of time when the sleeve B1 position target is neutral with sleeve B2 engaged in the 3rd or 5th gear.	1st-Reverse position sensor 1 Shift solenoid valve 3 Shift solenoid valve 4 Sequence solenoid valve Harness or connector (Open or short in the 1st-Reverse position sensor 1 circuit) (Open or short in the shift solenoid valve 3 circuit) (Open or short in the shift solenoid valve 4 circuit) (Open or short in the sequence solenoid valve circuit)
	Sleeve B1 function (poor gear engagement)*2	F	A DTC is set if the sleeve B1 position is 7.1 mm (0.28 in) or less and 1.7 mm (0.067 in) or more when the sleeve B1 position target is on the 1st gear side.	Shift solenoid valve 3 Shift solenoid valve 4 Axis B feed pressure solenoid valve Sleeve B1 related part Harness or connector (Open or short in the shift solenoid valve 3 circuit) (Open or short in the shift solenoid valve 4 circuit) (Open or short in the sequence solenoid valve circuit)
		G	A DTC is set if the sleeve B1 position is −1.7 mm (−0.067 in) or less and −7.1 mm (−0.28 in) or more when the sleeve B1 position target is on the reverse gear side.
	Sleeve B1 function (gear release)*3	H	A DTC is set if the following statuses 1 and 2 are detected. The difference between the clutch B speed calculated from the output shaft speed sensor value and clutch B speed sensor value is 1,000 rpm or more. The difference between the clutch B speed calculated from the vehicle speed signal (meter) (CAN signal) and clutch B speed sensor value is 1,000 rpm or more.	Clutch B speed sensor Sleeve B1 related part Harness or connector (Open or short in the clutch B speed sensor circuit)
		I	A DTC is set if the sleeve B1 and B2 positions are not in 1st gear during driving in the 1st gear.	Shift solenoid valve 3 Shift solenoid valve 4 Sleeve B1 related part Harness or connector (Open or short in the shift solenoid valve 3 circuit) (Open or short in the shift solenoid valve 4 circuit)
		J	A DTC is set if the sleeve B1 and B2 positions are not in reverse during driving in the reverse gear.
	1st-Reverse position sensor compatibility	K	A DTC is set if the difference between the sleeve B1 position calculated from the 1st-Reverse position sensor 1 value and the sleeve B1 position calculated from the 1st-Reverse position sensor 2 is 6 mm or more.	1st-Reverse position sensor 1 1st-Reverse position sensor 2 Harness or connector (Open or short in the 1st-Reverse position sensor 1 circuit) (Open or short in the 1st-Reverse position sensor 2 circuit)

■ CAUTION ■

• If CONSULT-III is not available, “Diagnosis Procedure (GT-R certified NISSAN dealer)” must be performed before starting “DTC CONFIRMATION PROCEDURE”.
  
• If CONSULT-III is not available, never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
  
• Be careful of the driving speed.