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

DIAGNOSIS SYSTEM (TCM)

TRANSMISSION: GR6Z30A

 
 FUNCTION

Items
 		Function
Ecu Identification
 		Displays control unit part number or identification number.
Self Diagnostic Result
 		Receives self-diagnosis results from control unit and displays DTCs.
Data Monitor
 		Receives, displays and records the input/output signals from control unit.
Active Test
 		Transmits commands to control unit to change output signals and check operation of output system.
Work support
 		Adjusts the components or systems quickly and exactly.
Configuration
 		Writes the data such as vehicle specification information to control unit.
CAN DIAG SUPPORT MNTR
 		Displays the communication status of CAN.

 
 SELF DIAGNOSTIC RESULT

Refer to DTC Index.
 
 DATA MONITOR
 
 Display Item List

X: Standard, –: Not applicable, : Option
Item name
(Unit)
Monitor menu
Remarks
ECU
INPUT
SIGNALS
MAIN
SIGNALS
SELECTION FROM ITEM
SLEEVE B1 POSI 1
(mm or in.)
–
X

Displays the sleeve B1 position calculated from the signal voltage of the 1st-Reverse position sensor 1.
SLEEVE B1 POSI 2
(mm or in.)
–
X

Displays the sleeve B1 position calculated from the signal voltage of the 1st-Reverse position sensor 2.
1-R POSITION SEN 1
(mV)
X
–

Displays the signal voltage of the 1st-Reverse position sensor 1.
1-R POSITION SEN 2
(mV)
X
–

Displays the signal voltage of the 1st-Reverse position sensor 2.
SLEEVE A2 POSI
(mm or in.)
–
X

Displays the sleeve A2 position calculated from the signal voltage of the 2nd-4th position sensor.
2-4 POSITION SEN
(mV)
X
–

Displays the signal voltage of the 2nd-4th position sensor.
SLEEVE B2 POSI
(mm or in.)
–
X

Displays the sleeve B2 position calculated from the signal voltage of the 3rd-5th position sensor.
3-5 POSITION SEN
(mV)
X
–

Displays the signal voltage of the 3rd-5th position sensor.
SLEEVE A1 POSI
(mm or in.)
–
X

Displays the sleeve A1 position calculated from the signal voltage of the 6th-Neutral position sensor.
6-N POSITION SEN
(mV)
X
–

Displays the signal voltage of the 6th-Neutral position sensor.
ABS OPERATION SIG
(On/Off)
X
–

Displays the ABS operation signal received from ABS actuator and electric unit (control unit) via CAN communication.
ACCEL POSI SEN 1
(0.0/8)
X
–

Displays the accelerator pedal position signal received from ECM via CAN communication.
MON SHIFT SOL 1
(On/Off)
X
–

Monitors the command value from TCM to the shift solenoid valve 1, and displays the monitor value.
COMM SHIFT S/V 1
(On/Off)
–
–

Displays the command value from TCM to the shift solenoid valve 1.
MON SHIFT SOL 2
(On/Off)
X
–

Monitors the command value from TCM to the shift solenoid valve 2, and displays the monitor value.
COMM SHIFT S/V 2
(On/Off)
–
–

Displays the command value from TCM to the shift solenoid valve 2.
MON SHIFT SOL 3
(On/Off)
X
–

Monitors the command value from TCM to the shift solenoid valve 3, and displays the monitor value.
COMM SHIFT S/V 3
(On/Off)
–
–

Displays the command value from TCM to the shift solenoid valve 3.
MON SHIFT SOL 4
(On/Off)
X
–

Monitors the command value from TCM to the shift solenoid valve 4, and displays the monitor value.
COMM SHIFT S/V 4
(On/Off)
–
–

Displays the command value from TCM to the shift solenoid valve 4.
FLUID TEMP
(°C)
–
–

Displays the transmission fluid temperature calculated from the signal voltage of the oil temperature sensor.
FLUID TEMP SEN
(mV)
X
–

Displays the signal voltage of the oil temperature sensor.
TRGT AXIS A PRESS
(MPa)
–
–

Displays the axis A feed pressure target value of TCM.
MON AXIS A S/V
(A)
X
–

Monitors the command current from TCM to the axis A feed pressure solenoid valve, and displays the monitor value. (It does not always correspond to the axis A feed pressure solenoid valve value)
COMM AXIS A S/V
(A)
–
–

Displays the command current from TCM to the axis A feed pressure solenoid valve.
TRGT AXIS B PRESS
(MPa)
–
–

Displays the axis B feed pressure target value of TCM.
MON AXIS B S/V
(A)
X
–

Monitors the command current from TCM to the axis B feed pressure solenoid valve, and displays the monitor value. (It does not always correspond to the axis B feed pressure solenoid valve value)
COMM AXIS B S/V
(A)
–
–

Displays the command current from TCM to the axis B feed pressure solenoid valve.
STOP LAMP SW
(On/Off)
X
–

Displays the operation status of the stop lamp switch.
CLUTCH A PRESS
(MPa)
–
–

Displays the clutch A pressure calculated from the signal voltage of the clutch A pressure sensor.
CLUTCH A PRS SEN
(mV)
X
–

Displays the signal voltage of the clutch A pressure sensor.
TGT CLUTCH A PRS
(MPa)
–
–

Displays the clutch A pressure target value of TCM.
CLUTCH A SPEED
(rpm)
–
–

Displays the clutch A speed calculated from the pulse signal of the clutch A speed sensor.
MON CLUTCH A S/V
(A)
X
–

Monitors the command current from TCM to the clutch A solenoid valve, and displays the monitor value. (It does not always correspond to the clutch A solenoid valve value)
COM CLUTCH A S/V
(A)
–
–

Displays the command current from TCM to the clutch A solenoid valve.
CLUTCH A TEMP
(°C)
–
–

Displays the estimated clutch A temperature calculated by TCM.
CLUTCH B PRESS
(MPa)
–
–

Displays the clutch B pressure calculated from the signal voltage of the clutch B pressure sensor.
CLUTCH B PRS SEN
(mV)
X
–

Displays the signal voltage of the clutch B pressure sensor.
TGT CUTCH B PRES
(MPa)
–
–

Displays the clutch B pressure target value of TCM.
CLUTCH B SPEED
(rpm)
–
–

Displays the clutch B speed calculated from the pulse signal of the clutch B speed sensor.
MON CLUTCH B S/V
(A)
X
–

Monitors the command current from TCM to the clutch B solenoid valve, and displays the monitor value. (It does not always correspond to the clutch B solenoid valve value)
COM CLUTCH B S/V
(A)
–
–

Displays the command current from TCM to the clutch B solenoid valve.
CLUTCH B TEMP
(°C)
–
–

Displays the estimated clutch B temperature calculated by TCM.
GR POSITION

–
–

Displays the transmission gear positions recognized by TCM.
ENGINE SPEED
(rpm)
X
X

Displays the engine speed signal received from ECM via CAN communication.
GR POSI INDICATION

–
X

Displays the transmission gear positions recognized by TCM.
IGN SW
(On/Off)
X
–

Displays the operation status of the ignition switch.
LINE PRESSURE
(MPa)
–
–

Displays the line pressure value calculated from the signal voltage of the line pressure sensor.
LINE PRESS SENSOR
(mV)
X
–

Displays the signal voltage of the line pressure sensor.
TRGT LINE PRESS
(MPa)
–
–

Displays the line pressure target value of TCM.
MON LINE PRES S/V
(A)
X
–

Monitors the command current from TCM to the line pressure solenoid valve, and displays the monitor value. (It does not always correspond to the line pressure solenoid valve value)
COM LINE PRES S/V
(A)
–
–

Displays the command current from TCM to the line pressure solenoid valve.
TRGT LUBE PRESS
(MPa)
–
–

Displays the lubricating flow target value of TCM.
MON LUBE S/V
(A)
X
–

Monitors the command current from TCM to the lubricating flow solenoid valve, and displays the monitor value. (It does not always correspond to the lubricating flow solenoid valve value)
COMM LUBE S/V
(A)
–
–

Displays the command current from TCM to the lubricating flow solenoid valve.
AM RANGE CHG SW 1
(On/Off)
X
–

Displays the operation status of the Auto/Manual range change switch 1.
AM RANGE CHG SW 2
(On/Off)
X
–

Displays the operation status of the Auto/Manual range change switch 2.
MODE

–
X

Displays the set-up switch (transmission) and driving range statuses.
COM R MODE LAMP
(On/Off)
–
–

Displays the operation status of the R mode lamp on the set-up switch (transmission).
COM S MODE LMP
(On/Off)
–
–

Displays the operation status of the SNOW mode lamp on the set-up switch (transmission).
COM NEUTRAL SIG
(On/Off)
–
–

Displays the neutral status judged by TCM from the range sensor and park position switch in the control device.
OUTPUT SHAFT SPD
(rpm)
–
–

Displays the output shaft speed calculated from the pulse signal of the output shaft speed sensor.
PARK POSITION SW
(On/Off)
X
–

Displays the operation status of the park position switch.
RANGE

–
X

Displays the shift lever positions recognized by TCM.
COM BACK LMP RLY
(On/Off)
–
–

Displays the command value from TCM to the back-up lamp relay.
MON BACK LMP RLY
(On/Off)
X
–

Monitors the command value from TCM to the back-up lamp relay, and displays the monitor value.
MON SEQ S/V
(On/Off)
X
–

Monitors the command value from TCM to the sequence solenoid valve, and displays the monitor value.
COMM SEQ S/V
(On/Off)
–
–

Displays the command value from TCM to the sequence solenoid valve.
R MODE SW
(On/Off)
X
–

Displays the operation status of the R mode switch on the set-up switch (transmission).
SNOW MODE SW
(On/Off)
X
–

Displays the operation status of the SNOW mode switch on the set-up switch (transmission).
TR SENSOR No.0
(On/Off)
X
–

Displays the operation status of the range sensor No.0 in the control device.
TR SENSOR No.1
(On/Off)
X
–

Displays the operation status of the range sensor No.1 in the control device.
TR SENSOR No.2
(On/Off)
X
–

Displays the operation status of the range sensor No.2 in the control device.
TR SENSOR No.3
(On/Off)
X
–

Displays the operation status of the range sensor No.3 in the control device.
TR SENSOR No.4
(On/Off)
X
–

Displays the operation status of the range sensor No.4 in the control device.
TR SENSOR No.5
(On/Off)
X
–

Displays the operation status of the range sensor No.5 in the control device.
VEHICLE SPEED
(km/h or mph)
X
X

Displays the vehicle speed signal (meter) received via CAN communication from the combination meter.
COM STARTER RLY
(On/Off)
–
–

Displays the command value from TCM to the starter relay.
MON STARTER RLY
(On/Off)
X
–

Monitors the command value from TCM to the starter relay, and displays the monitor value.
PADDLE SFT (DOWN)
(On/Off)
X
–

Displays the operation status of the paddle shifter (shift-down switch).
PADDLE SFT (UP)
(On/Off)
X
–

Displays the operation status of the paddle shifter (shift-up switch).
ACCEL POSI SEN 2
(0.0/8)
X
–

Displays the accelerator pedal position signal received from ECM via CAN communication.
BATTERY VOLTAGE
(V)
X
X

Displays the power supply voltage of TCM.
VDC OPERATION SIG
(On/Off)
X
–

Displays the VDC operation signal received from ABS actuator and electric unit (control unit) via CAN communication.
TCM RELAY
(On/Off)
–
–

Displays the operation status of the TCM relay.
SHIFT LOCK SOL
(On/Off)
–
–

Displays the operation status of the shift lock solenoid.

 
 ACTIVE TEST
 
 Procedure

    1.Apply parking brake.
    2.Shift the shift lever to the P position.
    ■ CAUTION ■
    Check that the park lock operates.
    3.Start the engine.
    4.Select the operation item.
    NOTE：
    • Operable only in the P position, and inoperable in other positions.
    • Only one item is operable, and multiple items cannot be operated at the same time.

 
 Test item list

Items
 		Function check
SHIFT S/V 1
 		In response to the ON/OFF command from CONSULT-III, TCM supplies the current to the solenoid valve to enable an operation check of the solenoid valve.
■ CAUTION ■
If the solenoid valve has a malfunction such as sticking, it does not operate. Check for operation noise or vibrations.
SHIFT S/V 2
SHIFT S/V 3
SHIFT S/V 4
SEQUENCE S/V
LINE PRESS S/V
 		In response to the pressure indication value from CONSULT-III, TCM supplies the current to the solenoid valve to enable an operation check of the solenoid valve.
■ CAUTION ■
If the solenoid valve has a malfunction such as sticking, it does not operate. Check using Data Monitor.
NOTE：
Controls so that the oil pressure is built up in each solenoid valve.
C/L B PRESS S/V
C/L A PRESS S/V
LUBRICATION FLOW-RATE S/V
A-AXIS SUPPLY PRESSURE S/V
B-AXIS SUPPLY PRESSURE S/V
STARTER RELAY
 		In response to the ON/OFF command from CONSULT-III, TCM supplies the current to the relay to enable an operation check of the relay.
■ CAUTION ■
If the relay has a malfunction such as sticking, it does not operate. Check for an operation noise or vibrations.
REVERSE LAMP RELAY
TCM RELAY
SHIFT LOCK SOLENOID
 		In response to the ON/OFF command from CONSULT-III, TCM supplies the current to the shift lock solenoid to enable an operation check of the shift lock solenoid.
■ CAUTION ■
If the solenoid has a malfunction such as sticking, it does not operate. Check for an operation noise or vibrations.
NOTE：
With the engine running and the brake pedal depressed, check that the shift lever� can be moved from the P position� in accordance with the ON/OFF operation.

 
 WORK SUPPORT
 
 Procedure

    1.Apply parking brake.
    2.Shift the shift lever to the P position.
    ■ CAUTION ■
    Check that the park lock operates.
    3.Start the engine.
    NOTE：
    The operation is available only after the ignition switch is turned ON, except for the “CLUTCH GEAR LEARNING”, “GEAR POSITION TEST”, and “DISENGAGING THE GEAR”.
    4.Select the operation item.
    NOTE：
    • Operable only in the P position, and inoperable in other positions.
    • Only one item is operable, and multiple items cannot be operated at the same time.

 
 Display Item List

Items
 		Function or item
 		Application
CLUTCH GEAR LEARNING
 		Perform the learning of the clutch touch point and the engaged gear position and neutral position for each gear.
■ CAUTION ■
  • Clutch gear learning can only be performed once in one driving cycle (the ignition switch OFF→ON→OFF).
  • If no clutch gear learning can be performed, it is necessary to turn the ignition switch OFF→ON, and perform the clutch gear learning again.

 		Always perform this procedure during maintenance and when TCM or transmission is replaced.
READ CLUTCH GEAR LEARNING DATA
 		Check the clutch gear learning status.
■ CAUTION ■
Except for learning experience check, after the learning, when the ignition switch is turned OFF, no more checks can be performed.
 		After the clutch gear learning, a check that the learning is completed normally can be performed.
GEAR POSITION TEST
 		Allows engagement of each gear individually.
 		The operation of each gear can be checked.
DISENGAGING THE GEAR
 		Allows making all the gears neutral.
 		Use when returning the gear to neutral.
ADJUST CLUTCH B CAPACITY
 		Allows adjustment of the clutch capacity in 15 stages.
  • 0: Initial
  • 1 – 7: Clutch capacity up
  • −1 –−7: Clutch capacity down
 		If a shock or slip is large during gear shift and start-up, adjust the clutch capacity.
ADJUST CLUTCH A CAPACITY
CLUTCH A TOUCH POINT
 		Allows adjustment of the clutch touch point in 15 stages.
  • 0: Initial
  • 1 – 7: Move the clutch touch point closer.
  • −1 –−7: Moves the clutch touch point farther.
 		In the event of a strong creep power, poor start-up response, or excess start-up shock, adjusts the clutch touch point.
CLUTCH B TOUCH POINT
WRITE PREVIOUS CLUTCH LEARNING VALUE
 		The clutch touch point learning value can be returned to the previous learning value.
 		Used when the clutch learning value is returned to the previous learning value upon the request from a customer (when the customer prefers the previous setting than the current learned driving feeling, for example).
DELETE GEAR POSITION LEARNING VALUE
 		The gear position learning value can be erased and returned to the initial value.
 		Always erase the previous transmission learning value, when the transmission is replaced.*1
DELETE CLUTCH A LEARNING VALUE
 		The clutch A learning value can be erased and returned to the initial value.
■ CAUTION ■
If the clutch learning values is erased at a time other than a transmission replacement, the previous learning values can no longer be resumed.
DELETE CLUTCH B LEARNING VALUE
 		The clutch B learning value can be erased and returned to the initial value.
■ CAUTION ■
If the clutch learning values is erased at a time other than a transmission replacement, the previous learning values can no longer be resumed.
ERASE CLTCH ENGGMNT PRSSR CRRCTN
 		The clutch engagement pressure correction value can be erased and returned to the initial value.
■ CAUTION ■
If only TCM is replaced, since a new TCM has no memory of the clutch engagement pressure correction value, it may require the clutch A/B capacity adjustment.
SHOW OIL TEMP HISTORY
 		The transmission fluid temperature frequency can be confirmed in 5 stages, providing the information of the temperature range used.
 		By checking the proportion of the count in each range, it can be used as information to judge whether hard driving occurs.
HIGH OIL TEMP WARNING HISTORY
  • Clutch A Protection 1, 2, 3, 4*2
  • Clutch B Protection 1, 2, 3, 4*2
  • Clutch Overheat Protection History 1*3
  • Line Pressure Loss History*4
  • High Oil Temp Protection History 1, 2, 3*5
  • *1: If the learning value is erased, the transmission warning light blinks.
  • *2: Refer to the “Clutch protection history”.
  • *3: Refer to the “Clutch overheat protection history”.
  • *4: Refer to the "Line pressure loss history".
  • *5: Refer to the "High oil temperature Protection History".


Clutch protection history
  • If the clutch temperature increases abnormally, the activation of protection control can be checked. In addition, because the protection control consists of a few stages, the history is displayed in each stage.
    Items
    		Clutch protection 1
    		Clutch protection 2
    		Clutch protection 3
    		Clutch protection 4
    Description
    		The transmission warning lamp is illuminated and the message “T/M CLUTCH TEMP HIGH STOP VEHICLE UNTIL WARNING TURNS OFF” appears in the information display.
    		Performs the engine torque restriction.
    		Lowers the upper limit of the engine torque restriction.
    		Release the clutch.
    Operation conditions (if either of them is met)
    		Clutch temperature conditions
    		Depending on the clutch temperature increase, the clutch protection control shifts from clutch protection 1 to 4.
    Stall driving conditions*1
    		Depending on the time from the start of stall driving, the clutch protection control shifts from clutch protection 1 to 4.
    Cancel conditions
    		When the clutch temperature is lowered and the wide open throttle status continues for a certain period.
    Warning light on
    		Exists
    Engine torque restriction
    		Does not exist
    		Exists
    *1: It is judged as the “stall driving conditions”, if the following conditions are met. Acceleration pedal position: Approx. 0.6/8 or more, vehicle speed: Approx. 3 km/h (1 MPH) or less


Clutch overheat protection history
  • Shows the operation history of the clutch overheating protection control due to stall driving. Refer to the “Clutch protection”.

Line pressure loss history
  • Shows the history of abnormal drop of the line pressure. [The line pressure sensor value is 0.2 MPa (2.04 kg/cm2, 29 psi) or less]
    NOTE：
    The possible causes for line pressure drop are as follows.
    • Fluid level drop due to oil leakage
    • Poor fluid suction due to deformation of the oil pan or others


High oil temperature protection history
  • If the transmission fluid temperature increases abnormally, the activation of protection control can be checked. In addition, because the protection control consists of a few stages, the history is displayed in each stage.
    Items
    		High oil temperature protection history 1
    		High oil temperature protection history 2
    		High oil temperature protection history 3
    Description
    		The transmission warning lamp is on and the message “T/M OIL TEMP HIGH DECREASE SPEED” appears in the information display.
    		Performs the engine torque restriction and engine speed restriction.
    		Lowers the upper limit of the engine torque restriction and engine speed restriction.
    Operation contents
    		As the oil temperature increases, the high oil protection control shifts from the high oil temperature protection history 1 to 3.
    Cancel conditions
    		When the oil temperature is lowered and the wide open throttle status continues for a certain period of time.
    Warning light on
    		Exists
    Engine torque restriction, engine speed restriction
    		Does not exist
    		Exists

    ■ CAUTION ■
    • During one driving cycle (ignition switch OFF → ON → OFF), if the “High Oil Temp Protection History 2” status is reached 3 times, after that the high oil temperature protection remains active.
    • When the ignition switch is turned OFF, the high oil temperature protection is deactivated.

 
 CONFIGURATION
 
 Procedure

    1.Apply parking brake.
    2.Shift the shift lever to the P position.
    ■ CAUTION ■
    Check that the park lock operates.
    3.Turn the ignition switch ON.
    4.Select the operation item.
 
 Display Item List

Items
 		Function
 		Application
Write IP Chara
 		Writes the acquired IP characteristics data to TCM.
  • If the transmission is replaced: Write the IP characteristics of replaced transmission to TCM that is not replaced.
  • If TCM is replaced: Write the IP characteristics of transmission that is not replaced to replaced TCM.
  • If both of them are replaced: Write the IP characteristics of replaced transmission to replaced TCM.
■ CAUTION ■
  • The “write IP characteristics” can only be performed once in one driving cycle (the ignition switch OFF→ON→OFF).
  • If the write IP characteristics cannot be performed, turn the ignition switch OFF→ON and perform the write IP characteristics again.

 		The individual variations of the transmission hydraulic parts are read into TCM to stabilize the control.
Read IP Chara Written Data
 		Check the write IP characteristics status.
■ CAUTION ■
Except for the write experience, nothing can be checked after the IP writing, if the ignition switch is turned OFF.
 		The write IP characteristics status can be checked when the write IP characteristics is completed or the writing is not successful.