2008 INFINITI QX56 Factory Service Manual

Page 3569 of 4083

INFINITI QX56 2008  Factory Service Manual TM-22
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
Input/Output Signal of TCM
INFOID:0000000001603992
*1: Spare for output speed sensor
*2: Spare for accelerator pedal position signal
*3: If these input

Page 3570 of 4083

INFINITI QX56 2008  Factory Service Manual A/T CONTROL SYSTEMTM-23
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
• This line pressure solenoid controls the pressure regulat or valve as the signal pressure and adjusts the pres-
sure o

Page 3571 of 4083

INFINITI QX56 2008  Factory Service Manual TM-24
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
The necessary and adequate line pressure for shift change is set.
For this reason, line pressure pattern setting corresponds to input
torque and gearshi

Page 3572 of 4083

INFINITI QX56 2008  Factory Service Manual A/T CONTROL SYSTEMTM-25
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
*1: Full phase real-time feedback control monitors move ment of gear ratio at gear change, and controls oil
pressure at re

Page 3573 of 4083

INFINITI QX56 2008  Factory Service Manual TM-26
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled w

Page 3574 of 4083

INFINITI QX56 2008  Factory Service Manual A/T CONTROL SYSTEMTM-27
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
FUNCTION OF PRESSURE SWITCH 
Pilot valve A Adjusts the line pressure and produces the constant pressure (pilot pressure) r

Page 3575 of 4083

INFINITI QX56 2008  Factory Service Manual TM-28
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
Component Parts Location
INFOID:0000000001604000
AWDIA0837GB
Revision: March 2010 2008 QX56

Page 3576 of 4083

INFINITI QX56 2008  Factory Service Manual A/T SHIFT LOCK SYSTEMTM-29
< FUNCTION DIAGNOSIS >
CEF
G H
I
J
K L
M A
B
TM
N
O P
A/T SHIFT LOCK SYSTEM
System DescriptionINFOID:0000000001696150
• The selector lever cannot be shifted from “P” (