2006 NISSAN VERSA Workshop Service Repair Manual

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Page 41 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual AT-28
A/T CONTROL SYSTEM
Revision: June 20062007 Versa
“D4 ” (OD) Position
High clutch
Brake band
Forward clutch (Does not affect power
transmission)Input power is transmitted to front carrier

Page 42 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual A/T CONTROL SYSTEM
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“R” Position
Reverse clutch
Low & reverse brakeFront planetary carrier is stationary because of the operation of

Page 43 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual AT-30
A/T CONTROL SYSTEM
Revision: June 20062007 Versa
TCM FunctionUCS005MC
The function of the TCM is to:
Receive input signals sent from various switches and sensors.
Determine required line press

Page 44 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual A/T CONTROL SYSTEM
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CAN CommunicationUCS005M D
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real tim

A/T CONTROL SYSTEM
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CAN CommunicationUCS005M D
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-47,
"CAN System Specification Chart" .
Input/Output Signal of TCMUCS005M E
*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: Used as a condition for starting self-diagnostics; if self-diagnosis are not started, it is judged that there is some kind of error.
*5: Input by CAN communications.
*6: Output by CAN communications.Control itemLine
pressure
controlVehicle
speed
controlShift
controlLock-up
controlEngine
brake
controlFail-safe
functionSelf-diag-
nostics
function
InputAccelerator pedal position signal
(*5)XXXXX(*3) XX
Vehicle speed sensor·A/T
(Revolution sensor)XXXXX(*3) XX
Vehicle speed sensor·MTR (*1) X (*1) X (*1) X (*1) X X
Closed throttle position signal
(*5)(*2) X(*2) XXX(*4) X
Wide open throttle position signal
(*5)(*2) X (*2) X (*4) X
Turbine revolution sensor (Power
train revolution sensor)XX X XX
Engine speed signal X X X X
PNP switch X X X X X (*3) X (*4) X
Stop lamp switch signal
(*5)XX (*4) X
A/T fluid temperature sensors
(*5)XXXX XX
Overdrive control switch signal
(*5)XXXX (*4) X
TCM power supply voltage signal X X X X
Out-
putShift solenoid valve A/B X (*3) X X
Line pressure solenoid X (*3) X X
Torque converter clutch solenoid
valveX(*3) XX
Overrun clutch solenoid valve X X (*3) X X
OD OFF indicator lamp
(*6)XX

Page 45 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual AT-32
A/T CONTROL SYSTEM
Revision: June 20062007 Versa
Line Pressure ControlUCS005M F
TCM has various line pressure control characteristics to match the driving conditions.
An ON-OFF duty signal is

Page 46 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual A/T CONTROL SYSTEM
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AT LOW FLUID TEMPERATURE
A/T fluid viscosity and frictional characteristics of the clutch facing change with A/T fluid

Page 47 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual AT-34
A/T CONTROL SYSTEM
Revision: June 20062007 Versa
CONTROL OF SHIFT VALVES A AND B
Pilot pressure generated by the operation of shift solenoid valves A and B is applied to the end face of shift
va

Page 48 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual A/T CONTROL SYSTEM
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Lock-up Released
In the lock-up released state, the torque converter clutch control valve is set into the unlocked sta

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