Nissan Murano Z51 (2008 year). Manual - part 380

PG-6, "Wiring Diagram - BATTERY POWER SUPPLY -"

Diagnosis Procedure

INFOID:0000000003317839

CHECK TCM POWER SOURCE

Turn ignition switch OFF.

Disconnect TCM connector.

Check voltage between TCM vehicle side harness connector terminals.

*: This is applied to up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO), JN8AZ18U*9W710000,
JN8AZ18W*9W810000 (FOR MEXICO)

Is the inspection result normal?

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1701

TCM-POWER SUPPLY

• When the power supply to the TCM is cut

off, for example because the battery is re-
moved, and the self-diagnosis memory
function stops.

• This is not a malfunction message (When-

ever shutting off a power supply to the
TCM, this message appears on the
screen).

Harness or connectors
(Battery or ignition switch and TCM circuit is
open or shorted.)

TCM vehicle side harness connector

Condition

Voltage (Approx.)

Connector

Terminal

F23

5, 42

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

45*

Always

Battery voltage

Revision: 2008 October

2009 Murano

TM-84

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

YES

>> GO TO 6.

>> GO TO 2.

CHECK TCM GROUND CIRCUIT

Turn ignition switch OFF.

Check continuity between TCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK TCM POWER CIRCUIT

Check voltage between TCM vehicle side harness connector terminals and ground.

*: This is applied to up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO), JN8AZ18U*9W710000,
JN8AZ18W*9W810000 (FOR MEXICO)

Is the inspection result normal?

YES

>> GO TO 6.

>> GO TO 4.

CHECK HARNESS BETWEEN TCM AND IPDM E/R AND BETWEEN TCM AND BATTERY (PART 1)

Turn ignition switch OFF.

Disconnect IPDM E/R connector.

Check continuity between TCM vehicle side harness connector terminals and IPDM E/R vehicle side har-
ness connector terminal.

Disconnect fuse block (J/B) connector.

Check continuity between TCM vehicle side harness connector terminals and fuse block (J/B) vehicle side
harness connector terminal.

*: This is applied to up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO), JN8AZ18U*9W710000,
JN8AZ18W*9W810000 (FOR MEXICO)

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

Existed

TCM vehicle side harness connector

Ground

Condition

Voltage (Approx.)

Connector

Terminal

F23

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

Ignition switch OFF

0 V

45*

Always

Battery voltage

TCM vehicle side harness connector

IPDM E/R vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

F12

Existed

TCM vehicle side harness connector

Fuse block (J/B) vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

45*

E103

12F

Existed

Revision: 2008 October

2009 Murano

P1701 TRANSMISSION CONTROL MODULE (POWER SUPPLY)

TM-85

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

Is the inspection result normal?

YES

>> GO TO 5.

>> Repair or replace damaged parts.

CHECK HARNESS BETWEEN TCM AND IPDM E/R AND BETWEEN TCM AND BATTERY (PART 2)

Check continuity between TCM vehicle side harness connector terminals and ground.

*: This is applied to up to VIN: JN8AZ18U*9W100000, JN8AZ18W*9W200000 (EXCEPT FOR MEXICO), JN8AZ18U*9W710000,
JN8AZ18W*9W810000 (FOR MEXICO)

Is the inspection result normal?

YES

Check the following. If NG, repair or replace damaged parts.

• 10A fuse (No. 43, located in IPDM E/R)
• 10A fuse [No. 11, located in fuse block (J/B)]
• Ignition switch. Refer to

>> Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEMS

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

Is the inspection result normal?

YES

TM-86, "Diagnosis Procedure"

>> Repair or replace damaged parts.

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

45*

Not existed

Revision: 2008 October

2009 Murano

TM-86

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1705 THROTTLE POSITION SENSOR

P1705 THROTTLE POSITION SENSOR

Description

INFOID:0000000003317840

The electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throt-
tle position sensor, etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM via CAN
communication.

DTC Logic

INFOID:0000000003317841

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Depress accelerator pedal fully and release it, then wait for 5 seconds.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1705 TP SEN/CIRC A/T” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003317842

CHECK DTC WITH ECM

With CONSULT-III

Turn ignition switch ON.

Perform “Self Diagnostic Results” in “ENGINE”.

Is the inspection result normal?

YES

>> GO TO 2.

>> Check DTC Detected Item. Refer to

EC-521, "DTC Index"

CHECK DTC WITH TCM

With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is “P1705 TP SEN/CIRC A/T” detected?

YES

>> GO TO 3.

DETECT MALFUNCTIONING ITEMS

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

Is the inspection result normal?

YES

TM-87, "Diagnosis Procedure"

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1705

TP SEN/CIRC A/T

TCM does not receive the proper accelera-
tor pedal position signals (input via CAN
communication) from ECM.

• ECM
• Harness or connectors

(CAN communication line is open or
shorted.)

Revision: 2008 October

2009 Murano

P1722 ESTM VEHICLE SPEED SIGNAL

TM-87

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1722 ESTM VEHICLE SPEED SIGNAL

Description

INFOID:0000000003317843

The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to TCM via CAN com-
munication line.

DTC Logic

INFOID:0000000003317844

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Select “Data Monitor” in “TRANSMISSION”.

Start engine and maintain the following conditions for at least 5 consecutive seconds.

Is “P1722 ESTM VEH SPD SIG” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003317845

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

With CONSULT-III

Perform “Self Diagnostic Results” in “ABS”.
Is the inspection result normal?

YES

>> GO TO 2.

>> Check DTC detected item. Refer to

BRC-102, "DTC No. Index"

(VDC/TCS/ABS).

CHECK DTC WITH TCM

With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1722 ESTM VEH SPD SIG” detected?

YES

TM-89, "Diagnosis Procedure"

>> GO TO 3.

DETECT MALFUNCTIONING ITEMS

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

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1722

ESTM VEH SPD SIG

• CAN communication with the ABS actua-

tor and the electric unit (control unit) is
malfunctioning.

• There is a big difference between the ve-

hicle speed signal from the ABS actuator
and the electric unit (control unit), and the
vehicle speed sensor signal.

• Harness or connectors

(Sensor circuit is open or shorted.)

• ABS actuator and electric unit (control

unit)

ACC PEDAL OPEN

: 1.0/8 or less

VEHICLE SPEED

: 30 km/h (19 MPH) or more

Revision: 2008 October

2009 Murano

P1723 CVT SPEED SENSOR FUNCTION

TM-89

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1723 CVT SPEED SENSOR FUNCTION

Description

INFOID:0000000003317846

The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of
parking 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.

DTC Logic

INFOID:0000000003317847

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Select “Data Monitor” in “TRANSMISSION”.

Start engine and maintain the following conditions for at least 5 consecutive seconds.

Is “P1723 CVT SPD SEN/FNCTN” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003317848

CHECK STEP MOTOR FUNCTION

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1778 STEP MOTR/FNC” detected?

YES

>> Repair or replace damaged parts. Refer to

TM-98, "DTC Logic"

>> GO TO 2.

CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM

Check output speed sensor (secondary speed sensor) system. Refer to

TM-53, "DTC Logic"

Is the inspection result normal?

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1723

CVT SPD SEN/FNCTN

A rotation sensor error is detected because
the gear does not change in accordance
with the position of the stepping motor.

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.

• Harness or connectors

(Sensor circuit is open or shorted.)

• Output speed sensor (secondary speed

sensor)

• Input speed sensor (primary speed sen-

sor)

• Engine speed signal system

VEHICLE SPEED

: 10 km/h (6 MPH) or more

ACC PEDAL OPEN

: More than 1.0/8

RANGE

: “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.

Revision: 2008 October

2009 Murano

TM-90

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1723 CVT SPEED SENSOR FUNCTION

YES

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM

Check input speed sensor (primary speed sensor) system. Refer to

TM-50, "DTC Logic"

Is the inspection result normal?

YES

>> GO TO 4.

>> Repair or replace damaged parts.

CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system. Refer to

TM-57, "DTC Logic"

Is the inspection result normal?

YES

>> GO TO 5.

>> Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

TM-91, "Diagnosis Procedure"

>> Repair or replace damaged parts.

Revision: 2008 October

2009 Murano

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

TM-91

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1726 ELECTRIC THROTTLE CONTROL SYSTEM

Description

INFOID:0000000003317849

DTC Logic

INFOID:0000000003317850

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Start engine and let it idle for 5 seconds.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1726 ELEC TH CONTROL” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

>> Check DTC Detected Item. Refer to

Diagnosis Procedure

INFOID:0000000003317851

CHECK DTC WITH ECM

With CONSULT-III

Turn ignition switch ON.

Select “Self Diagnostic Results” in “ENGINE”.

Is the inspection result normal?

YES

>> GO TO 2.

EC-521, "DTC Index"

CHECK DTC WITH TCM

With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.
Is “P1726 ELEC TH CONTROL” detected?

YES

>> GO TO 3.

DETECT MALFUNCTIONING ITEMS

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

Is the inspection result normal?

YES

TM-92, "Diagnosis Procedure"

>> Repair or replace damaged parts.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1726

ELEC TH CONTROL

The electronically controlled throttle for ECM
is malfunctioning.

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

Revision: 2008 October

2009 Murano

TM-92

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1740 LOCK-UP SELECT SOLENOID VALVE

P1740 LOCK-UP SELECT SOLENOID VALVE

Description

INFOID:0000000003317852

• The 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.

DTC Logic

INFOID:0000000003317853

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Select “Data Monitor” in “TRANSMISSION”.

Start engine and maintain the following conditions for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P1740 LU-SLCT SOL/CIRC” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

TM-93, "Component Inspection (Lock-up Select Solenoid

Diagnosis Procedure

INFOID:0000000003317854

CHECK LOCK-UP SELECT SOLENOID VALVE CIRCUIT

Turn ignition switch OFF.

Disconnect TCM connector.

Check resistance between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

>> GO TO 2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT SOLENOID VALVE) (PART 1)

Disconnect CVT unit connector.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1740

LU-SLCT SOL/CIRC

• Normal voltage is not applied to solenoid

due to cut line, short, etc.

• TCM detects as irregular by comparing

target value with monitor value.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Lock-up select solenoid valve

RANGE

: “D”, “N” and “L” position

(At each time, wait for 5 seconds.)

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F23

6.0 – 19.0

Ω

Revision: 2008 October

2009 Murano

P1740 LOCK-UP SELECT SOLENOID VALVE

TM-93

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT SOLENOID VALVE) (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

>> Repair or replace damaged parts.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check lock-up select solenoid valve. Refer to

Valve)"

Is the inspection result normal?

YES

>> GO TO 5.

>> Replace transaxle assembly. Refer to

DETECT MALFUNCTIONING ITEMS

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

Is the inspection result normal?

YES

>> Repair or replace damaged parts.

Component Inspection (Lock-up Select Solenoid Valve)

INFOID:0000000003317855

CHECK LOCK-UP SELECT SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace transaxle assembly. Refer to

TM-94, "Diagnosis Procedure"

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

F24

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

Not existed

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

6.0 – 19.0

Ω

Revision: 2008 October

2009 Murano

TM-94

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1745 LINE PRESSURE CONTROL

P1745 LINE PRESSURE CONTROL

Description

INFOID:0000000003317856

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.

DTC Logic

INFOID:0000000003317857

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON

Select “Data Monitor” in “TRANSMISSION”.

Make sure that output voltage of CVT fluid temperature sensor is within the range below.

Is “P1745 L/PRESS CONTROL” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

Diagnosis Procedure

INFOID:0000000003317858

CHECK DTC

With CONSULT-III

Start engine.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1745 L/PRESS CONTROL” detected?

YES

>> Check intermittent incident. Refer to

TM-95, "Diagnosis Procedure"

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1745

L/PRESS CONTROL

TCM detects the unexpected line pressure.

TCM

ATF TEMP SEN

: 1.0 – 2.0 V

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)

Revision: 2008 October

2009 Murano

P1777 STEP MOTOR

TM-95

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1777 STEP MOTOR

Description

INFOID:0000000003317859

The step motor changes the step by 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.

DTC Logic

INFOID:0000000003317860

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Start engine.

Drive vehicle for at least 5 consecutive seconds.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P1777 STEP MOTR CIRC” detected?

YES

>> Go to

>> Check intermittent incident. Refer to

TM-96, "Component Inspection (Step Motor)"

Diagnosis Procedure

INFOID:0000000003317861

CHECK STEP MOTOR CIRCUIT

Turn ignition switch OFF.

Disconnect TCM connector.

Check resistance between TCM vehicle side harness connector terminals.

Check resistance between TCM vehicle side harness connector terminals and ground.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P1777

STEP MOTR CIRC

Each coil of the step motor is not energized
properly due to an open or a short.

• Harness or connectors

(Step motor circuit is open or shorted.)

• Step motor

TCM vehicle side harness connector

Resistance (Approx.)

Connector

Terminal

F23

30.0

Ω

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F23

15.0

Ω

Revision: 2008 October

2009 Murano

TM-96

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1777 STEP MOTOR

Is the inspection result normal?

YES

>> GO TO 5.

>> GO TO 2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)

Disconnect CVT unit connector.

Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side har-
ness connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

>> Repair or replace damaged parts.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)

Check continuity between TCM vehicle side harness connector terminals and ground.

Is the inspection result normal?

YES

>> GO TO 4.

>> Repair or replace damaged parts.

CHECK STEP MOTOR

Check step motor. Refer to

Is the inspection result normal?

YES

>> GO TO 5.

>> Replace transaxle assembly. Refer to

DETECT MALFUNCTIONING ITEMS

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

Is the inspection result normal?

YES

>> Repair or replace damaged parts.

Component Inspection (Step Motor)

INFOID:0000000003317862

CHECK STEP MOTOR

Check resistance between CVT unit connector terminals.

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

F24

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

Not existed

CVT unit connector

Resistance (Approx.)

Connector

Terminals

F24

30.0

Ω

Revision: 2008 October

2009 Murano

P1777 STEP MOTOR

TM-97

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

Check resistance between CVT unit connector terminals and ground.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace transaxle assembly. Refer to

TM-98, "Diagnosis Procedure"

CVT unit connector

Ground

Resistance (Approx.)

Connector

terminal

F24

15.0

Ω

Revision: 2008 October

2009 Murano

TM-98

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P1778 STEP MOTOR - FUNCTION

P1778 STEP MOTOR - FUNCTION

Description

INFOID:0000000003317863

• The step motor changes the step by 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.

• This diagnosis item is detected when the electrical system is OK, but the mechanical system is NG.
• This diagnosis item is detected when the state of the changing of the speed mechanism in the unit does not

operate normally.

DTC Logic

INFOID:0000000003317864

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

• Always drive vehicle at a safe speed.
• Before starting “DTC CONFIRMATION PROCEDURE”, confirm “Hi” or “Mid” or “Low” fixation by

“PRI SPEED” and “VEHICLE SPEED” in “Data Monitor”.

• If hi-geared fixation occurred, go to

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

CHECK DTC DETECTION

With CONSULT-III

Turn ignition switch ON.

Select “Data Monitor” in “TRANSMISSION”.

Make sure that output voltage of CVT fluid temperature sensor is within the range below.

Start engine and maintain the following conditions for at least 30 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P1778 STEP MOTR/FNC” detected?

YES

>> Go to

TM-98, "Diagnosis Procedure"

>> Check intermittent incident. Refer to