Nissan Murano Z50 (2003 year). Manual - part 61

CVT SYSTEM

CVT-17

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CVT

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Control System

ACS0029J

SCIA1929E

CVT-18

CVT SYSTEM

Revision; 2004 April

2003 Murano

Hydraulic Control System

ACS002IN

SCIA1807E

CVT SYSTEM

CVT-19

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CVT

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TCM Function

ACS0020H

The function of the TCM is to:

●

Receive input signals sent from various switches and sensors.

●

Determine required line pressure, shifting point, and lock-up operation.

●

Send required output signals to the step motor and the respective solenoids.

CONTROL SYSTEM OUTLINE 

The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.

CONTROL SYSTEM DIAGRAM 

SENSORS (or SIGNAL)

Þ

TCM

Þ

ACTUATORS

PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
Engine torque signal
CVT fluid temperature sensor
Vehicle speed signal
Second position switch signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Primary pressure sensor
Secondary pressure sensor

Shift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
Duet-EA control
CAN system
On board diagnosis

Step motor 
Torque converter clutch solenoid 
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid 
valve
Second position indicator lamp

SCIA5131E

CVT-20

CVT SYSTEM

Revision; 2004 April

2003 Murano

CAN Communication Unit For 2WD Models

ACS003L3

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.

TYPE 1/TYPE 2/TYPE 3/TYPE 4/TYPE 5/TYPE 6/TYPE 7/TYPE 8
System Diagram

●

Type1

●

Type2

SKIA4902E

SKIA4903E

CVT SYSTEM

CVT-21

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CVT

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●

Type3

●

Type4

●

Type5

SKIA4904E

SKIA4905E

SKIA4906E

CVT-22

CVT SYSTEM

Revision; 2004 April

2003 Murano

●

Type6

●

Type7

●

Type8

SKIA4907E

SKIA4908E

SKIA4909E

CVT SYSTEM

CVT-23

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CVT

Revision; 2004 April

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Input/Output Signal Chart

T: Transmit   R: Receive

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

control 

unit

Dis-
play 

unit

Dis-
play 

control 

unit

BCM

Uni-

fied 

meter 

and A/

C amp.

Driver 

seat 

control 

unit

ABS 

actua-

tor and 

elec-

tric unit 

(con-

trol 

unit)

IPDM 

E/R

Engine speed signal

T

R

R

R

R

Engine status signal

T

R

Engine coolant temperature signal

T

R

CVT position indicator signal

T

R

Second position signal 

R

T

Second position indicator signal

T

R

Engine and CVT integrated control 
signal

T

R

R

T

Accelerator pedal position signal 

T

R 

Closed throttle position signal

T

R 

Wide open throttle position signal

T

R 

Key switch signal

T

R

Ignition switch signal

T

R

R

P range signal

T

R

Stop lamp switch signal

R

T

Fuel consumption monitor signal

T

R

CVT self-diagnosis signal

R

T

ABS operation signal

R

T

Air conditioner switch signal

R

T

A/C compressor request signal

T

R

A/C compressor feedback signal

T

R

Blower fan motor switch signal

R

T

A/C control signal

T

T

R

R

R

T

Cooling fan speed request signal

T

R

Position lights request signal

T

R

R

Low beam request signal

T

R

Low beam status signal

R

T

High beam request signal

T

R

R

High beam status signal

R

T

Front fog lights request signal

T

R

Vehicle speed signal

R

R

T

R

R

R

R

T

R

Sleep request 1 signal

T

R

Sleep request 2 signal

T

R

Door switch signal

R

T

R

R

T

R

R

R

Turn indicator signal

T

R

CVT-24

CVT SYSTEM

Revision; 2004 April

2003 Murano

Key fob ID signal

T

R

Key fob door unlock signal

T

R

Seat belt buckle switch signal

R

T

Oil pressure switch signal

R

T

T

R

Buzzer output signal

T

R

Fuel level sensor signal

R

T

Fuel level low warning signal

R

R

T

Malfunction indicator lamp signal

T

R

ASCD SET lamp signal

T

R

ASCD CRUISE lamp signal

T

R

Input shaft revolution signal

R

T

Output shaft revolution signal

R

T

Front wiper request signal

T

R

Front wiper stop position signal

R

T

Rear window defogger switch signal

T

R

Rear window defogger control signal

R

R

R

T

Hood switch signal

R

T

Theft warning horn request signal

T

R

Horn chirp signal

T

R

Tire pressure signal

T

R

Tire pressure data signal

T

R

R

ABS warning lamp signal

R

T

Brake warning lamp signal

R

T

System setting signal

T

T

R

Parking brake switch signal

R

T

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

control 

unit

Dis-
play 

unit

Dis-
play 

control 

unit

BCM

Uni-

fied 

meter 

and A/

C amp.

Driver 

seat 

control 

unit

ABS 

actua-

tor and 

elec-

tric unit 

(con-

trol 

unit)

IPDM 

E/R

CVT SYSTEM

CVT-25

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CVT

Revision; 2004 April

2003 Murano

TYPE 9/TYPE10/TYPE 11/TYPE 12/TYPE 13/TYPE 14/TYPE 15/TYPE 16
System Diagram

●

Type9

●

Type10

●

Type11

SKIA4910E

SKIA4911E

SKIA4912E

CVT-26

CVT SYSTEM

Revision; 2004 April

2003 Murano

●

Type12

●

Type13

●

Type14

SKIA4913E

SKIA4914E

SKIA4915E

CVT SYSTEM

CVT-27

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CVT

Revision; 2004 April

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●

Type15

●

Type16

SKIA4916E

SKIA4917E

CVT-28

CVT SYSTEM

Revision; 2004 April

2003 Murano

Input/Output Signal Chart

T: Transmit   R: Receive

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and A/

C 

amp.

Steer-

ing 

angle 

sen-

sor

Driver 

seat 
con-

trol 

unit

ABS 

actua-

tor 

and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

Engine speed signal

T

R

R

R

R

R

Engine status signal

T

R

Engine coolant temperature signal

T

R

Engine and CVT integrated control 
signal

T

R

R

T

Accelerator pedal position signal 

T

R

R

Closed throttle position signal

T

R 

Wide open throttle position signal

T

R 

Key switch signal

T

R

Ignition switch signal

T

R

R

P range signal

T

R

R

Stop lamp switch signal

R

T

VDC operation signal

R

T

Second position indicator signal

T

R

R

Second position signal 

R

T

Fuel consumption monitor signal

T

R

CVT self-diagnosis signal

R

T

Input shaft revolution signal

R

T

R

Output shaft revolution signal

R

T

R

Air conditioner switch signal

R

T

A/C compressor request signal

T

R

A/C compressor feedback signal

T

R

Blower fan motor switch signal

R

T

A/C control signal

T

T

R

R

R

T

Cooling fan speed request signal

T

R

Position lights request signal

T

R

R

Low beam request signal

T

R

Low beam status signal

R

T

High beam request signal

T

R

R

High beam status signal

R

T

Front fog lights request signal

T

R

Vehicle speed signal

R

R

T

R

R

R

R

T

R

Sleep request 1 signal

T

R

Sleep request 2 signal

T

R

CVT SYSTEM

CVT-29

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CVT

Revision; 2004 April

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Door switch signal

R

T

R

R

T

R

R

R

Turn indicator signal

T

R

Key fob ID signal

T

R

Key fob door unlock signal

T

R

Seat belt buckle switch signal

R

T

Oil pressure switch signal

R

T

T

R

Buzzer output signal

T

R

Fuel level sensor signal

R

T

Fuel level low warning signal

R

R

T

Malfunction indicator signal

T

R

ASCD SET lamp signal

T

R

ASCD CRUISE lamp signal

T

R

Front wiper request signal

T

R

Front wiper stop position signal

R

T

Rear window defogger switch signal

T

R

Rear window defogger control signal

R

R

R

T

Hood switch signal

R

T

Theft warning horn request signal

T

R

Horn chirp signal

T

R

Steering angle sensor signal

T

R

Tire pressure signal

T

R

Tire pressure data signal

T

R

R

CVT position indicator signal

T

R

R

ABS warning lamp signal

R

T

VDC OFF indicator lamp signal

R

T

SLIP indicator lamp signal

R

T

Brake warning lamp signal

R

T

System setting signal

T

T

R

Parking brake switch signal

R

T

Signals

ECM

TCM

Low 

tire 

pres-

sure 

warn-

ing 

con-

trol 

unit

Dis-
play 

unit

Dis-
play 

con-

trol 

unit

BCM

Uni-

fied 

meter 

and A/

C 

amp.

Steer-

ing 

angle 

sen-

sor

Driver 

seat 
con-

trol 

unit

ABS 

actua-

tor 

and 

elec-

tric 

unit 

(con-

trol 

unit)

IPDM 

E/R

CVT-30

CVT SYSTEM

Revision; 2004 April

2003 Murano

CAN Communication Unit For AWD Models

ACS003L4

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.

TYPE 17/TYPE 18/TYPE 19/TYPE 20/TYPE 21/TYPE 22/TYPE 23/TYPE 24
System Diagram

●

Type17

●

Type18

SKIA4918E

SKIA4919E

CVT SYSTEM

CVT-31

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CVT

Revision; 2004 April

2003 Murano

●

Type19

●

Type20

●

Type21

SKIA4920E

SKIA4921E

SKIA4922E

CVT-32

CVT SYSTEM

Revision; 2004 April

2003 Murano

●

Type22

●

Type23

●

Type24

SKIA4923E

SKIA4924E

SKIA4925E