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

P0700 TCM

TRANSMISSION: GR6Z30A

P0700

Description


  • TCM consists of the microcomputer and input/output connectors for signal and power supply.
  • TCM controls the transmission by performing the following functions: power supply to the devices connected to the transmission, operation control for each solenoid valve and actuator, data receiving from each sensor, receiving of signals from the range sensors, paddle shifter, auto/manual range change switch and communication (CAN or hard wire) to C/U controlling other devices.
  • TCM uses 3 different power supply routes to distribute power supply to each sensor.
    Sensor power supply 1
    		Sensor power supply 2
    		Sensor power supply 3
    • Output shaft speed sensor
    • Line pressure sensor
    • Clutch A pressure sensor
    • Clutch A speed sensor
    • 6th-Neutral position sensor
    • 2nd-4th position sensor
    • Range sensor power supply 1 (Range sensor No. 0, 1, 3, 5)
    • Clutch B pressure sensor
    • Clutch B speed sensor
    • 1st-Reverse position sensor 1
    • 1st-Reverse position sensor 2
    • 3rd-5th position sensor
    • Range sensor power supply 2 (Range sensor No. 2, 4)

DTC Logic

 
 DTC DETECTION LOGIC

■ CAUTION ■
  • Before TCM is replaced, the IP characteristics must be extracted, based on the information read out from the malfunctioning TCM. For reading out the IP characteristic data, refer to “CONSULT-III GT-R TCM CONFIGURATION MANUAL”.
  • If no IP characteristic data can be extracted TCM and the transmission assembly must be replaced as a set.


DTC
 		Self-diagnosis name
 		DTC detection condition
 		Possible cause
P0700
 		ECM receiving malfunction
 		A
 		A DTC is set if TCM cannot receive the CAN communication signals from ECM for 2 seconds or more.
  • ECM
  • Harness or connector
    (CAN communication line is open or shorted)
Receiving of malfunctioning engine torque signal
 		B
 		A DTC is set if abnormal engine torque signal is received from ECM.
 		ECM
Receiving of malfunctioning engine speed signal
 		C
 		A DTC is set if abnormal engine speed signal is received from ECM.
Sensor power supply voltage
 		D
 		A DTC is set if TCM detects DTC P0720 and DTC P0872.
  • TCM
  • Harness or connector
    (Open in the TCM ground circuit)
TCM internal*
 		E
 		A DTC is set if TCM computing unit does not operate normally.
 		TCM
F
 		A DTC is set if TCM monitor unit does not operate normally.
G
 		A DTC is set if TCM function unit does not operate normally.
H
 		A DTC is set if TCM self-shutoff does not operate normally.
*: A DTC is displayed when E, F, G or H in the DTC detection conditions is detected.

 
 DTC CONFIRMATION PROCEDURE

 
 1.PREPARATION BEFORE OPERATION
 
 2.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION A, B
 
 3.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION C
 
 4.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION D
 
 5.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION E
 
 6.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION F
 
 7.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION G
 
 8.PERFORM DTC CONFIRMATION PROCEDURE — DTC DETECTION CONDITION H

Diagnosis Procedure


 
 1.CHECK CAN COMMUNICATION CIRCUIT
 
 2.CHECK DTC WITH ECM
 
 3.CHECK ENGINE SPEED
 
 4.CHECK OUTPUT SHAFT SPEED SENSOR CIRCUIT
 
 5.CHECK LINE PRESSURE SENSOR CIRCUIT
 
 6.CHECK HARNESS BETWEEN TCM AND GROUND
 
 7.CHECK INTERMITTENT INCIDENT