diagram INFINITI QX56 2011 Factory Service Manual

TM-54
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
SYSTEM
SHIFT PATTERN CONTROL : System Diagram
INFOID:0000000006226775
SHIFT PATTERN CONTROL : System DescriptionINFOID:0000000006226776
It automatically selects the shift pattern (such as r oad environment and driving style) suitable for the various
situations so as to allow the vehicle to be driven efficiently and smoothly.
ASC (ADAPTIVE SHIFT CONTROL)
JSDIA1854GB
Revision: 2010 May2011 QX56

TM-56
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
SYSTEM
Input/Output Signal Chart
*: This signal is transmitted via CAN communication line.
 The TCM receives the manual mode signal, non-manual mode signal, manual mode shift up signal and
manual mode shift down signal from combination meter via CAN communication line. The TCM shifts shift
pattern control to the manual mode based on these signal s, and then shifts the A/T by operating each sole-
noid valve according to the shift operation of the driver.
 The TCM prohibits the manual mode while being in fail-safe mode due to an A/T malfunction, etc. Refer to TM-74, "
Fail-Safe".
Manual Mode Information
 The TCM transmits the manual mode shift refusal signal to the combination meter if the TCM refuses the
transmission from the driving status of vehicle when the selector lever shifts to “UP (+ side)” or “DOWN (−
side)” side. The combination meter blinks shift indicator on the combination meter and sounds the buzzer to
indicate the driver that the shifting is not performed when receiving this signal. However, the TCM does not
transmit the manual mode shift refusal signal in the conditions as per the following.
- When the selector lever shifts to “DOWN ( − side)” side in 1GR.
- When the selector lever shifts to “UP (+ side)” side in 7GR.
LOCK-UP CONTROL
LOCK-UP CONTROL : System DiagramINFOID:0000000006226777
LOCK-UP CONTROL : System DescriptionINFOID:0000000006226778
 The torque converter clutch piston in the torque conv erter is engaged to eliminate torque converter slip to
increase power transmission efficiency.
 Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
 The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid
valve, which is controlled by a signal from TCM, and the torque converter clutch control valve engages or
releases the torque converter clutch piston.
Item Signal TCM function Actuator
Output speed sensor Vehicle speed
Manual mode High and low reverse clutch
solenoid valve
 Direct clutch solenoid valve
 Input clutch solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Front brake solenoid valve
 Torque converter clutch sole- noid valve
 Line pressure solenoid valve
 Anti-interlock solenoid valve
A/T fluid temperature sensor ATF temperature
ECM
Engine speed signal*
Accelerator pedal position sig-
nal*
Combination meter Manual mode signal*
Non-manual mode signal*
Manual mode shift up signal*
Manual mode shift down signal*
JSDIA1350GB
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TCM)TM-61
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
DIAGNOSIS SYSTEM (TCM)
CONSULT-III Function (TRANSMISSION)INFOID:0000000006226781
CONSULT-III APPLICATION ITEMS
*: Although “Function Test” and “Special Function” are selectable, do not use its.
WORK SUPPORT
SELF DIAGNOSTIC RESULTS
Refer to TM-78, "DTC Index".
IGN Counter
The IGN counter is indicated in Fr eeze frame data (FFD) and indicates the number of times that the ignition
switch is turned ON after returning to the normal state from DTC.
 CAN malfunction
- The number is 0 when a malfunction is detected now.
- The number increases like 1 → 2 → 3...38 → 39 after returning to the normal condition whenever ignition
switch OFF → ON.
- The number is fixed to 39 until the self-di agnosis results are erased if it is over 39.
 Other than CAN malfunction
- The number is 0 when a malfunction is detected now.
- The number increases like 1 → 2 → 3...254 → 255 after returning to the normal condition whenever ignition
switch OFF → ON.
- The number is fixed to255 until the self-diagno sis results are erased if it is over 255.
DATA MONITOR
X: Standard, —: Not applicable, : Option
Diagnostic test mode Function
Work Support This mode enables a technician to adjust some devices faster and more accurately.
Self Diagnostic Results Retrieve DTC from ECU and display diagnostic items.
Data Monitor Monitor the input/output signal of the control unit in real time.
CAN Diagnosis This mode displays a network diagnosis result about CAN by a diagram.
CAN Diagnostic Support
Monitor It monitors the status of CAN communication.
DTC & SRT confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
ECU Identification Display the ECU identification number (part number etc.) of the selected system.
Function Test* This mode can show results of self-diagnosis of ECU with either “OK” or “NG”. For engine, more prac-
tical tests regarding sensors/switches and/or actuators are available.
Special Function* Other results or histories, etc. that are recorded in ECU are displayed.
Item name Description
G SENSOR CALIBRATION Calibrates G sensor.
Monitored item (Unit) Monitor Item Selection
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM
ITEM
VHCL/S SE-A/T (km/h or mph) X X Displays the vehicle speed calculated by the
TCM from the output shaft revolution.
ESTM VSP SIG (km/h or mph) X — Displays the vehicle speed signal received via
CAN communication.
OUTPUT REV (rpm) X X Displays the output speed calculated from the
pulse signal of output speed sensor.
Revision: 2010 May2011 QX56

TM-80
< WIRING DIAGRAM >[7AT: RE7R01B]
A/T CONTROL SYSTEM
WIRING DIAGRAM
A/T CONTROL SYSTEM
Wiring DiagramINFOID:0000000006226787
JCDWM1062GB
Revision: 2010 May2011 QX56

A/T CONTROL SYSTEMTM-81
< WIRING DIAGRAM > [7AT: RE7R01B]
C
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G H
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J
K L
M A
B
TM
N
O P
JCDWM1063GB
Revision: 2010 May2011 QX56

TM-82
< WIRING DIAGRAM >[7AT: RE7R01B]
A/T CONTROL SYSTEM
JCDWM1064GB
Revision: 2010 May2011 QX56

A/T CONTROL SYSTEMTM-83
< WIRING DIAGRAM > [7AT: RE7R01B]
C
EF
G H
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J
K L
M A
B
TM
N
O P
JCDWM1065GB
Revision: 2010 May2011 QX56

TM-84
< WIRING DIAGRAM >[7AT: RE7R01B]
A/T CONTROL SYSTEM
JCDWM1066GB
Revision: 2010 May2011 QX56

A/T SHIFT LOCK SYSTEMTM-85
< WIRING DIAGRAM > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
A/T SHIFT LOCK SYSTEM
Wiring DiagramINFOID:0000000006226788
JCDWM1032GB
Revision: 2010 May2011 QX56

TM-86
< WIRING DIAGRAM >[7AT: RE7R01B]
A/T SHIFT LOCK SYSTEM
JCDWM1067GB
Revision: 2010 May2011 QX56