Nissan Murano Z50 (2005 year). Manual

DTC P1723 CVT SPEED SENSOR FUNCTION

CVT-165

CVT

Revision: 2005 August

2005 Murano

DTC P1723 CVT SPEED SENSOR FUNCTION

PFP:31907

Description

ACS002KB

The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of the
idler gear parking pawl lock gear and generates a pulse signal. The pulse signal is sent to the TCM, which
converts it into vehicle speed.
The input speed sensor (primary speed sensor) detects the primary pulley revolution speed and sends a sig-
nal to the TCM.

On Board Diagnosis Logic

ACS002U3

●

This is not an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1723 CVT SPD SEN/FNCTN” with CONSULT-II is detected when there is a
great difference between the vehicle speed signal and the secondary speed sensor signal.

CAUTION:

One of the “P0720 VEH SPD SEN/CIR AT”, the “P0715 INPUT SPD SEN/CIRC” or the “P0725 ENGINE
SPEED SIG“ is displayed with the DTC at the same time.

Possible Cause

ACS002KD

●

Harness or connectors
(Sensor circuit is open or shorted.)

●

Output speed sensor (Secondary speed sensor)

●

Input speed sensor (Primary speed sensor)

●

Engine speed signal system

DTC Confirmation Procedure

ACS002U4

CAUTION:

●

Always drive vehicle at a safe speed.

●

Be careful not to rev engine into the red zone on the tachometer.

NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 5 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.

WITH CONSULT-II

Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.

Start engine and maintain the following conditions for at least 5
consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: “D” position
ENG SPEED: 450 rpm or more
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.

If DTC is detected, go to

CVT-166, "Diagnostic Procedure"

BCIA0031E

CVT-166

DTC P1723 CVT SPEED SENSOR FUNCTION

Revision: 2005 August

2005 Murano

Diagnostic Procedure

ACS002KF

CHECK STEP MOTOR FUNCTION

Perform the self-diagnosis check. Refer to

CVT-67, "SELF-DIAGNOSTIC RESULT MODE"

Is a malfunction in the step motor function indicated in the results?

YES

>> Repair or replace damaged parts. (Check the step motor function. Refer to

CVT-179, "DTC P1778

STEP MOTOR - FUNCTION"

>> GO TO 2.

CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR SYSTEM) AND INPUT SPEED

SENSOR (PRIMARY SPEED SENSOR) SYSTEM

Check secondary speed sensor system and primary speed sensor system. Refer to

CVT-101, "DTC P0720

VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)"

CVT-96, "DTC P0715 INPUT SPEED

SENSOR CIRCUIT (PRI SPEED SENSOR)"

OK or NG

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system. Refer to

CVT-107, "DTC P0725 ENGINE SPEED SIGNAL"

OK or NG

>> GO TO 4.

>> Repair or replace damaged parts. Refer to

EC-641, "IGNITION SIGNAL"

DETECT MALFUNCTIONING ITEM

Check the following:

●

Power supply and ground circuit for TCM. Refer to

CVT-156, "DTC P1701 TRANSMISSION CONTROL

MODULE (POWER SUPPLY)"

●

The TCM pin terminals for damage or loose connection with harness connector.

OK or NG

>> GO TO 5.

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to

CVT-165, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> Replace TCM or transaxle assembly. Refer to

CVT-9, "Precautions for TCM and CVT Assembly

Replacement"

CVT-232, "Removal and Installation"

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM

CVT-167

CVT

Revision: 2005 August

2005 Murano

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM

PFP:23710

Description

ACS002KG

Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN
communication.

On Board Diagnosis Logic

ACS002U5

●

This is not an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1726 ELEC TH CONTROL·” with CONSULT-II is detected when the electroni-
cally controlled throttle for ECM is malfunctioning.

Possible Cause

ACS002KI

Harness or connectors
(Sensor circuit is open or shorted.)

DTC Confirmation Procedure

ACS002KJ

NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.

WITH CONSULT-II

Turn ignition switch ON. (Do not start engine.)

Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.

Start engine and let it idle for 5 second.

If DTC is detected, go to

CVT-168, "Diagnostic Procedure"

BCIA0031E

CVT-168

DTC P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Revision: 2005 August

2005 Murano

Diagnostic Procedure

ACS002KK

CHECK DTC WITH ECM

With CONSULT-II

Turn ignition switch ON. (Do not start engine.)

Select “SELF-DIAG RESULTS” mode for “ENGINE” with CON-
SULT-II. Refer to

EC-130, "SELF-DIAG RESULTS MODE"

OK or NG

>> GO TO 2.

>> Check the DTC Detected Item. Refer to

EC-130, "SELF-

DIAG RESULTS MODE"

●

If CAN communication line is detected, go to

CVT-74,

"DTC U1000 CAN COMMUNICATION LINE"

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to

CVT-167, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 3.

DETECT MALFUNCTIONING ITEM

Check the following:

●

The TCM pin terminals for damage or loose connection with harness connector.

OK or NG

>> Replace TCM. Refer to

CVT-9, "Precautions for TCM and CVT Assembly Replacement"

>> Repair or replace damaged parts.

BCIA0030E

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT

CVT-169

CVT

Revision: 2005 August

2005 Murano

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT

PFP:31941

Description

ACS002U6

●

Lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake
pressure).

●

When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.

CONSULT-II Reference Value

ACS002KM

On Board Diagnosis Logic

ACS002KN

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1740 LU-SLCT SOL/CIRC” with CONSULT-II is detected under the following
conditions.

–

When TCM compares target value with monitor value and detects an irregularity.

Possible Cause

ACS002KO

●

Lock-up select solenoid valve

●

Harness or connectors
(Solenoid circuit is open or shorted.)

DTC Confirmation Procedure

ACS002U7

CAUTION:

Always drive vehicle at a safe speed.

WITH CONSULT-II

Turn ignition switch ON. (Do not start engine.)

Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.

Start engine and maintain the following conditions for at least 5
consecutive seconds.
SELECTOR LEVER: “D” position and “N” position
(At each time, wait for 5 seconds.)

If DTC is detected, go to

CVT-171, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

Item name

Condition

Display value

LUSEL SOL OUT

“P”, “N” position

Wait at least for 5 seconds with the selector
lever in “R”, “D” “S”*, “L”* position
*: Without manual mode.

OFF

BCIA0031E

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT

CVT-171

CVT

Revision: 2005 August

2005 Murano

TCM terminal data are reference values, measured between each terminal and ground.

*: Without manual mode

Diagnostic Procedure

ACS002U9

CHECK INPUT SIGNAL

With CONSULT-II

Turn ignition switch ON.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “TRANSMISSION” with CONSULT-II.

Read out the value of “LUSEL SOL OUT”.

*: Without manual mode

Without CONSULT-II

Turn ignition switch ON.

Check voltage between TCM connector terminal and ground.

*: Without manual mode

Turn ignition switch OFF.

Disconnect the TCM connector.

Check if there is continuity between connector terminal and ground.

OK or NG

>> GO TO 5.

>> GO TO 2.

Terminal

Wire color

Item

Condition

Data (Approx.)

L/Y

Lock-up select
solenoid valve

“P” and “N” position

Battery voltage

Wait at least for 5 seconds with the
selector lever in “R”, “D”, “S”* and
“L”* position

Item name

Condition

Display value

LUSEL SOL OUT

“P”, “N” position

Wait at least for 5 seconds
with the selector lever in
“R”, “D” “S”*, “L”* position

OFF

SCIA4512E

Name

Connector

Terminal

(Wire color)

Condition

Voltage

(Approx.)

Lock-up
select sole-
noid valve

F103

4 (L/Y) -

Ground

“P” and “N” position

Battery
voltage

Wait at least for 5 sec-
onds with the selector
lever in “R”, “D”, “S”* and
“L”* position

SCIA4513E

CVT-172

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT

Revision: 2005 August

2005 Murano

CHECK LOCK-UP SELECT SOLENOID VALVE CIRCUIT

Turn ignition switch OFF.

Disconnect TCM connector.

Check resistance between TCM connector terminal and ground.

OK or NG

OK >> GO

>> GO TO 3.

CHECK VALVE RESISTANCE

Turn ignition switch OFF.

Disconnect CVT unit harness connector.

Check resistance between CVT unit harness connector terminal
and ground.

OK or NG

OK >> GO

>> Replace the transaxle assembly. Refer to

CVT-232,

"Removal and Installation"

CHECK HARNESS BETWEEN TCM AND LOCK-UP SELECT SOLENOID VALVE

Turn ignition switch OFF.

Disconnect TCM connector.

Check continuity between TCM connector terminal and CVT unit
harness connector terminal.

If OK, check harness for short to ground and short to power.

Reinstall any part removed.

OK or NG

>> GO TO 5.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to

CVT-169, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 6.

Solenoid valve

Connector

Terminal

(Wire color)

Resistance

(Approx.)

Lock-up select solenoid
valve

F103

4 (L/Y) - Ground

6.0 - 19.0

Ω

SCIA4692E

Solenoid valve

Connector

Terminal

Resistance

(Approx.)

Lock-up select solenoid
valve

13 - Ground

6.0 - 19.0

Ω

SCIA4693E

Item

Connector

Terminal

(Wire color)

Continuity

TCM

F103

4 (L/Y)

Yes

CVT unit harness connec-
tor

13 (L/Y)

SCIA4694E

DTC P1740 LOCK-UP SELECT SOLENOID VALVE CIRCUIT

CVT-173

CVT

Revision: 2005 August

2005 Murano

CHECK TCM

Check TCM input/output signal inspection. Refer to

CVT-58, "TCM Input/Output Signal Reference Values"

If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

OK or NG

>> INSPECTION END

>> 1. Repair or replace damaged parts.

2. Replace TCM. Refer to

CVT-9, "Precautions for TCM and CVT Assembly Replacement"

Component Inspection

ACS002UA

LOCK-UP SELECT SOLENOID VALVE

Turn ignition switch OFF.

Disconnect CVT unit harness connector.

Check resistance between CVT unit harness connector terminal
and ground.

If NG, replace the transaxle assembly. Refer to

CVT-232,

"Removal and Installation"

Solenoid valve

Connector

Terminal

Resistance

(Approx.)

Lock-up select solenoid
valve

13 - Ground

6.0 - 19.0

Ω

SCIA4693E

CVT-174

DTC P1745 LINE PRESSURE CONTROL

Revision: 2005 August

2005 Murano

DTC P1745 LINE PRESSURE CONTROL

PFP:31036

Description

ACS002KR

The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to a signal sent from the TCM.

On Board Diagnosis Logic

ACS002UB

●

This is not an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1745 L/PRESS CONTROL” with CONSULT-II is detected when TCM detects
the unexpected line pressure.

Possible Cause

ACS002KT

●

TCM

DTC Confirmation Procedure

ACS002UC

CAUTION:

●

Always drive vehicle at a safe speed.

●

Be careful not to rev engine into the red zone on the tachometer.

WITH CONSULT-II

Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.

Make sure that output voltage of CVT fluid temperature sensor
is within the range below.
FLUID TEMP SEN: 1.0 - 2.0V
If out of range, drive the vehicle to decrease the voltage
(warm up the fluid) or stop engine to increase the voltage
(cool down the fluid)

If DTC is detected, go to

CVT-174, "Diagnostic Procedure"

Diagnostic Procedure

ACS002UD

CHECK DTC

Turn ignition switch ON. (Do not start engine.)

Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-II.

Erase self-diagnostic results. Refer to

CVT-69, "How to Erase Self-diagnostic Results"

Turn ignition switch OFF, and wait for 5 seconds or more.

Start engine.

Confirm self-diagnostic results again. Refer to

CVT-67, "SELF-DIAGNOSTIC RESULT MODE"

Is the “P1745 L/PRESS CONTROL” displayed?

YES

>> Replace TCM. Refer to

CVT-9, "Precautions for TCM and CVT Assembly Replacement"

>> INSPECTION END

BCIA0031E

DTC P1777 STEP MOTOR - CIRCUIT

CVT-175

CVT

Revision: 2005 August

2005 Murano

DTC P1777 STEP MOTOR - CIRCUIT

PFP:31020

Description

ACS00216

●

The step motor changes the step with turning 4 coils ON/OFF according to the signal from TCM.
As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled.

CONSULT-II Reference Value

ACS0032M

Remarks: Specification data are reference values.

On Board Diagnosis Logic

ACS0032N

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1777 STEP MOTR CIRC” with CONSULT-II is detected under the following
conditions.

–

When operating step motor ON and OFF, there is no proper change in the voltage of TCM terminal which
corresponds to it.

Possible Cause

ACS0032O

●

Step motor

●

Harness or connectors
(Step motor circuit is open or shorted.)

DTC Confirmation Procedure

ACS0032P

CAUTION:

Always drive vehicle at a safe speed.

WITH CONSULT-II

Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.

Drive vehicle for at least 5 consecutive seconds.

If DTC is detected, go to

CVT-177, "Diagnostic Procedure"

WITH GST

Follow the procedure “WITH CONSULT-II”.

Monitor item

Condition

Display value (Approx.)

STM STEP

Drive the vehicle in a safe condition and
press/depress accelerator pedal.

-20 step - 190 step

SMCOIL A

Changes ON

⇔

OFF.

SMCOIL B

Changes ON

⇔

OFF.

SMCOIL C

Changes ON

⇔

OFF.

SMCOIL D

Changes ON

⇔

OFF.

BCIA0031E

DTC P1777 STEP MOTOR - CIRCUIT

CVT-177

CVT

Revision: 2005 August

2005 Murano

TCM terminals data are reference values.

Diagnostic Procedure

ACS00218

CHECK INPUT SIGNALS

With CONSULT-II

Start engine.

Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “TRANSMISSION” with CONSULT-II.

Start vehicle and read out the value of “STM STEP”, “SMCOIL
A”, “SMCOIL B”, “SMCOIL C”, and “SMCOIL D”.

OK or NG

>> GO TO 4.

>> GO TO 2.

CHECK HARNESS BETWEEN TCM AND STEP MOTOR

Turn ignition switch OFF.

Disconnect CVT unit connector and TCM connector.

Check continuity between TCM connector terminals and CVT
unit harness connector terminals.

If OK, check harness for short to ground and short to power.

If OK, check continuity between body ground and CVT assembly.

Reinstall any part removed.

OK or NG

>> GO TO 3.

>> Repair open circuit or short to ground or short to power in harness or connectors.

Terminal

Wire color

Item

Condition

Data (Approx.)

G/R

Step motor A

Within 2 seconds after ignition switch ON, the time measure-
ment by using the pulse width measurement function (Hi level)
of CONSULT-II.*1

CAUTION:

Connect the diagnosis data link cable to the vehicle diag-
nosis connector.
*1: A circuit tester cannot be used to test this item.

30.0 msec

O/B

Step motor B

10.0 msec

Step motor C

30.0 msec

R/G

Step motor D

10.0 msec

Monitor item

Condition

Display value (Approx.)

STM STEP

Drive the vehicle in a safe
condition and press/
depress accelerator
pedal.

-20 step - 190 step

SMCOIL A

Changes ON

⇔

OFF.

SMCOIL B

Changes ON

⇔

OFF.

SMCOIL C

Changes ON

⇔

OFF.

SMCOIL D

Changes ON

⇔

OFF.

SCIA4516E

Item

Connector

Terminal

(Wire color)

Continuity

TCM

F103

11 (G/R)

Yes

CVT unit harness connector

6 (G/R)

TCM

F103

12 (O/B)

Yes

CVT unit harness connector

7 (O/B)

TCM

F103

20 (R)

Yes

CVT unit harness connector

8 (R)

TCM

F103

21 (R/G)

Yes

CVT unit harness connector

9 (R/G)

SCIA4695E

CVT-178

DTC P1777 STEP MOTOR - CIRCUIT

Revision: 2005 August

2005 Murano

CHECK STEP MOTOR

Check step motor Refer to

CVT-178, "Component Inspection"

OK or NG

>> GO TO 4.

>> Repair or replace damaged parts.

CHECK DTC

Perform “DTC Confirmation Procedure”. Refer to

CVT-175, "DTC Confirmation Procedure"

OK or NG

>> INSPECTION END

>> GO TO 5.

CHECK TCM

Check TCM input/output signal. Refer to

CVT-58, "TCM Input/Output Signal Reference Values"

If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

OK or NG

>> INSPECTION END

>> Repair or replace damaged parts.

Component Inspection

ACS00219

STEP MOTOR

Turn ignition switch OFF.

Disconnect CVT unit harness connector.

Check resistance between CVT unit harness connector termi-
nals and ground.

If NG, replace the transaxle assembly. Refer to

CVT-232, "Removal and Installation"

Control valve

Connector

Terminal

Resistance

(Approx.)

Step motor

6 - 7

Ω

8 - 9

6 - Ground

Ω

7 - Ground

8 - Ground

9 - Ground

SCIA4696E

DTC P1778 STEP MOTOR - FUNCTION

CVT-179

CVT

Revision: 2005 August

2005 Murano

DTC P1778 STEP MOTOR - FUNCTION

PFP:31947

Description

ACS0021D

●

The step motor's 4 aspects of ON/OFF change according to the signal from TCM.
As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled.

●

This diagnosis item is detected when electrical system is OK, but mechanical system is NG.

●

This diagnosis item is detected when the state of the changing the speed mechanism in unit does not
operate normally.

CONSULT-II Reference Value

ACS0032Q

Remarks: Specification data are reference values.

On Board Diagnosis Logic

ACS0032R

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “P1778 STEP MOTR/FNC” with CONSULT-II is detected under the following con-
ditions.

–

When not changing the pulley ratio according to the instruction of TCM.

Possible Cause

ACS0032S

●

Step motor

DTC Confirmation Procedure

ACS0032T

CAUTION:

●

Always drive vehicle at a safe speed.

●

Be careful not to rev engine into the red zone on the tachometer.

●

Before starting “DTC Confirmation Procedure”, confirm “Hi” or “Mid” or “Low” fixation by “PRI
SPEED” and “VEHICLE SPEED” on “DATA MONITOR MODE”.

●

If hi-geared fixation occurred, go to

CVT-180, "Diagnostic Procedure"

WITH CONSULT-II

Turn ignition switch ON and select “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.

Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.

Start engine and maintain the following conditions for at least 30
consecutive seconds.
TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1/8
Selector lever: “D” position
ENG SPEED: 450 rpm or more

If DTC is detected, go to

CVT-180, "Diagnostic Procedure"

Item name

Condition

Display value (Approx.)

STM STEP

During driving

-20 step - 190 step

GEAR RATIO

2.37 - 0.43

BCIA0031E