Nissan Murano: System / Line Pressure Control
System Description
SYSTEM DIAGRAM

DESCRIPTION
Highly accurate line pressure control and secondary pressure control reduces friction for improvement of fuel economy.
Normal Oil Pressure Control
Appropriate line pressure and secondary pressure suitable for driving condition are determined based on the accelerator pedal position, engine speed, primary pulley (input) speed, secondary pulley (output) speed, Nissan Murano vehicle speed, input torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power voltage, target shift ratio, oil temperature, oil pressure, and manual mode signal.
Secondary Pressure Feedback Control
In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is determined by detecting the secondary pressure using an oil pressure sensor and by feedback control.
System Description
SYSTEM DIAGRAMMAIN CONTROL CONTENTS OF TCM Controls
Reference
Line pressure control
System Description
Shift control
System Description
Select control
System Description
Lock-up control
System Description
Fail-safe
Fail-safe
Self-diagnosis function
CONSULT Function
Communication function with CONSULT
CONSULT Function
LIST OF CONTROL ITEMS AND INPUT/OUTPUT Control Item Shift control Line pressure control Select control Lock-up control Fail-safe function*
Input
Engine torque signal
(CAN communication)
×
×
×
×
×
Engine speed signal
(CAN communication)
×
×
×
×
×
Accelerator pedal position signal
(CAN communication)
×
×
×
×
Closed throttle position signal
(CAN communication)
×
×
×
Stop lamp switch signal
(CAN communication)
×
×
×
×
Primary pressure sensor
×
Secondary pressure sensor
×
×
×
CVT fluid temperature sensor
×
×
×
×
×
Primary speed sensor
×
×
×
×
×
Output speed sensor
×
×
×
×
Input speed sensor
×
×
×
×
×
Transmission range switch
×
×
×
×
×
Manual mode switch
(CAN communication)
×
×
×
Output
Line pressure solenoid valve
×
×
×
×
Primary pressure solenoid valve
×
×
×
Torque converter clutch solenoid valve
×
×
Secondary pressure solenoid valve
×
×
×
Select solenoid valve
×
×
×
Shift position indicator
(CAN communication)
×
*: If these input/output signals show errors, TCM activates the fail-safe function...
System Description
SYSTEM DIAGRAMDESCRIPTIONTo select the gear ratio that can give the driving force to meet driver's intent or vehicle situation, the Nissan Murano vehicle driving condition such as vehicle speed or accelerator pedal position is detected and the most appropriate gear ratio is selected and the shifting method before reaching the speed is determined...
Other information:
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DTC Description
DTC DETECTION LOGICAn EOP sensor signal voltage applied to ECM remains lower than the specified value continuously for 10 seconds or more when the engine speed is 1,000 rpm or more. DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0524
ENGINE OIL PRESSURE
(Engine oil pressure too low)
Diagnosis condition
—
Signal (terminal)
Voltage signal transmitted from EOP sensor signal to ECM
Threshold
An EOP sensor signal voltage applied to ECM remains lower than the specified value continuously when the engine speed is 1,000 rpm or more
Diagnosis delay time
10 seconds or more
POSSIBLE CAUSE
Decrease in engine oil pressure
Decrease in engine oil level
Engine oil condition
EOP sensor
Cause of engine oil consumption
FAIL-SAFE Engine operating condition in fail-safe mode
Fail safe mode Nissan Murano Vehicle behavior
Engine oil pressure
ECM illuminates oil pressure warning lamp on the combination meter...