Nissan Murano Z50 (2006 year). Manual - part 67

DTC P1778 STEP MOTOR - FUNCTION

CVT-177

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CVT

Revision: 2006 August

2006 Murano

 WITH GST

Follow the procedure “WITH CONSULT-II”.

Diagnostic Procedure

NCS0018L

1. 

CHECK STEP MOTOR

 With CONSULT-II

It is monitoring whether “GEAR RATIO: 2.37 - 0.43” changes similarly to “STM STEP: -20 - 190” by DATA
MONITOR mode. Refer to 

CVT-68, "DATA MONITOR MODE"

 .

 Without CONSULT-II

Inspect the engine speed (rise and descend), vehicle speed, throttle position, and check shift change. Refer to

CVT-236, "Vehicle Speed When Shifting Gears"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace the transaxle assembly. Refer to 

CVT-229, "Removal and Installation"

 .

CVT-178

SECOND POSITION SWITCH

Revision: 2006 August

2006 Murano

SECOND POSITION SWITCH

PFP:34910

Description

NCS0018M

Second position switch is built into CVT control device. When selector lever is in “S” or “L” position, second
position switch turns ON and sends a signal to unified meter and A/C amp. Then signal is transferred to TCM
with CAN communications to improve engine brake performance.

CONSULT-II Reference Value

NCS0018N

Remarks: Specification data are reference values.

Item name

Condition

Display value

SPORT MODE SW

Selector lever in “S” and “L” positions 

ON

Selector lever in other positions

OFF

SECOND POSITION SWITCH

CVT-179

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CVT

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Wiring Diagram — CVT — SPSW

NCS0018O

TCWA0162E

CVT-180

SECOND POSITION SWITCH

Revision: 2006 August

2006 Murano

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

Diagnostic Procedure

NCS0018P

1. 

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Is any malfunction of the “U1000 CAN COMM CIRCUIT” indicated in the results?

YES

>> Check CAN communication line. Refer to 

CVT-72, "DTC U1000 CAN COMMUNICATION LINE"

 .

NO

>> GO TO 2.

2. 

CHECK SECOND POSITION SWITCH SIGNAL

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.

3.

Read out ON/OFF switching action of the “SPORT MODE SW”.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

3. 

CHECK SECOND POSITION SWITCH

Check second position switch. Refer to 

CVT-181, "Component Inspection"

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK SELF-DIAGNOSTIC RESULTS (UNIFIED METER AND A/C AMP)

Perform self-diagnosis check. Refer to 

DI-15, "CONSULT-II Function (METER A/C AMP)"

 .

Is any malfunction detected by self-diagnostic?

YES

>> Check the malfunctioning system.

NO

>> GO TO 5.

5. 

CHECK SELF-DIAGNOSTIC RESULTS (COMBINATION METER)

Perform self-diagnosis check. Refer to 

DI-15, "Self-Diagnosis Mode of Combination Meter"

 .

Is any malfunction detected by self-diagnostic?

YES

>> Check the malfunctioning system.

NO

>> GO TO 6.

Terminal

Wire 

color

Item

Condition

Data (Approx.)

5

L

CAN-H

—

—

6

Y

CAN-L

—

—

Item name

Condition

Display value

SPORT MODE SW

Selector lever in “S” and 
“L” positions 

ON

Selector lever in other 
positions

OFF

SCIA4517E

SECOND POSITION SWITCH

CVT-181

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CVT

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6. 

CHECK SECOND POSITION SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect CVT device connector and unified meter and A/C amp connector.

3.

Check continuity between CVT device harness connector termi-
nal and unified meter and A/C amp harness connector terminal.

4.

Check continuity between CVT device harness connector termi-
nal and ground.

5.

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

6.

Reinstall any part removed.

OK or NG

OK

>> INSPECTION END

NG

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

Component Inspection

NCS0018Q

SECOND POSITION SWITCH

Check continuity between CVT device harness connector terminals.

Item

Connector

Terminal

Continuity

CVT device harness connector

M57

1

Yes

Unified meter and A/C amp har-
ness connector

M51

37

SCIA4592E

Item

Connec-

tor

Terminal

Continuity

CVT device har-

ness connector

M57

2 - Ground

Yes

SCIA4593E

Item

Condition

Connector

Terminal

Continuity

Second posi-
tion switch

Selector lever in 
“S” and “L” posi-

tions

M57

1 - 2

Yes

Selector lever in 

other positions

No

SCIA2041E

CVT-182

CVT INDICATOR CIRCUIT

Revision: 2006 August

2006 Murano

CVT INDICATOR CIRCUIT

PFP:24810

Description

NCS0018R

TCM sends the switch signals to unified meter and A/C amp via CAN communication line. Then manual mode
switch position is indicated on the CVT indicator.

CONSULT-II Reference Value

NCS0018S

Diagnostic Procedure

NCS0018T

1. 

CHECK INPUT SIGNALS

 With CONSULT-II

1.

Start engine.

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-II and read
out the value of “M GEAR POS”.

3.

Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of
the position mutually coincide when the select lever is shifted to the “+ (up)” or “- (down)” side (1st 

⇔

 6th

gear).

 OK or NG

OK

>> INSPECTION END

NG

>> Check the following.

CVT INDICATOR SYMPTOM CHART

Item name

Condition 

Display value

M GEAR POS

During driving

1, 2, 3, 4, 5, 6

Items

Presumed location of trouble

The actual gear position does not change, or shifting into the 
manual mode is not possible (no gear shifting in the manual mode 
possible).
The CVT position indicator is not indicated.

Manual mode switch

●

Refer to 

CVT-132, "DTC P0826 MANUAL MODE SWITCH 

CIRCUIT"

 .

CVT main system (Fail-safe function actuated)

●

Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

The actual gear position changes, but the CVT position indicator 
is not indicated.

Perform the self-diagnosis function.

●

Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

The actual gear position and the indication on the CVT position 
indicator do not coincide.

Perform the self-diagnosis function.

●

Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Only a specific position or positions is/are not indicated on the 
CVT position indicator.

Check the meter control unit.

●

Refer to 

DI-4, "COMBINATION METERS"

 .

TROUBLE DIAGNOSIS FOR SYMPTOMS

CVT-183

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CVT

Revision: 2006 August

2006 Murano

TROUBLE DIAGNOSIS FOR SYMPTOMS

PFP:00007

Wiring Diagram — CVT — NONDTC

NCS0018U

TCWB0122E

CVT-184

TROUBLE DIAGNOSIS FOR SYMPTOMS

Revision: 2006 August

2006 Murano

TCWB0260E

TROUBLE DIAGNOSIS FOR SYMPTOMS

CVT-185

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CVT

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2006 Murano

TCWA0258E

CVT-186

TROUBLE DIAGNOSIS FOR SYMPTOMS

Revision: 2006 August

2006 Murano

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

Terminal

Wire 

color

Item

Condition

Data (Approx.)

5

L

CAN-H

—

—

6

Y

CAN-L

—

—

8

SB

Back-up lamp 
relay

Selector lever in “R” position.

0 V

Selector lever in other positions.

Battery voltage

13

G/W

ROM assembly

—

—

14

L/R

ROM assembly

—

—

15

BR/R

ROM assembly

—

—

42

W/R

Sensor ground

Always

 0 V

46

L/O

Sensor power

—

 4.5 - 5.5 V

—

 

0  V

TROUBLE DIAGNOSIS FOR SYMPTOMS

CVT-187

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CVT

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2006 Murano

CVT Indicator Lamp Does Not Come On

NCS0018V

SYMPTOM:

CVT indicator lamp does not come on for about 2 seconds when turning ignition switch ON.

DIAGNOSTIC PROCEDURE

1. 

CHECK CAN COMMUNICATION LINE

Perform the self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Is any malfunction of the “U1000 CAN COMM CIRCUIT” indicated in the results?

YES

>> Check CAN communication line. Refer to 

CVT-72, "DTC U1000 CAN COMMUNICATION LINE"

 .

NO

>> GO TO 2.

2. 

CHECK TCM POWER SOURCE

1.

Turn ignition switch ON.

2.

Check voltage between TCM connector terminals and ground.
Refer to 

CVT-154, "Wiring Diagram — CVT — POWER"

 .

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING ITEM

Check the following.

●

Harness for short or open between ignition switch and TCM connector terminal 10, 19
Refer to 

CVT-154, "Wiring Diagram — CVT — POWER"

 .

●

10 A fuse (No.83, located in the IPDM E/R). Refer to 

CVT-154, "Wiring Diagram — CVT — POWER"

 . 

●

Ignition switch. Refer to 

PG-3, "POWER SUPPLY ROUTING CIRCUIT"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts. 

4. 

CHECK TCM GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check continuity between TCM connector terminals and ground.
Refer to 

CVT-154, "Wiring Diagram — CVT — POWER"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

Name

Connec-

tor

Terminal

Voltage (Approx.)

Power supply

F103

10 - Ground

Battery voltage

19 - Ground

Battery voltage

SCIA4737E

Name

Connector

Terminal

Continuity

Ground

F104

25 - Ground

Yes

48 - Ground

SCIA2671E

CVT-188

TROUBLE DIAGNOSIS FOR SYMPTOMS

Revision: 2006 August

2006 Murano

5. 

DETECT MALFUNCTIONING ITEM

Check the following.

●

Harness and fuse for short or open between ignition switch and CVT indicator lamp

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6. 

CHECK SYMPTOM

Check again. Refer to 

CVT-48, "Check before Engine Is Started"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

7. 

CHECK COMBINATION METERS

Check combination meters. Refer to 

DI-4, "COMBINATION METERS"

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

CVT-189

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CVT

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2006 Murano

Engine Cannot Be Started in “P” and “N” Position

NCS0018W

SYMPTOM:

●

Engine cannot be started with selector lever in “P” or “N” position.

●

Engine can be started with selector lever in “D”, “M” or “R” position. (With manual mode)

●

Engine can be started with selector lever in “D”, “S”, “L” or “R” position. (Without manual mode)

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Do the self-diagnostic results indicate PNP switch circuit or start signal circuit?

YES

>> Check PNP switch circuit or start signal circuit. Refer to 

CVT-81, "DTC P0705 PARK/NEUTRAL

POSITION SWITCH"

  or 

CVT-75, "DTC P0615 START SIGNAL CIRCUIT"

 .

NO

>> GO TO 2.

2. 

CHECK CONTROL CABLE

Check control cable. Refer to 

CVT-212, "Checking of CVT Position"

OK or NG

OK

>> GO TO 3.

NG

>> Adjust control cable. Refer to 

CVT-211, "Adjustment of

CVT Position"

 .

3. 

CHECK STARTING SYSTEM

Check starting system. Refer to 

SC-9, "STARTING SYSTEM"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

SCIA2001E

CVT-190

TROUBLE DIAGNOSIS FOR SYMPTOMS

Revision: 2006 August

2006 Murano

In “P” Position, Vehicle Moves Forward or Backward When Pushed

NCS0018X

SYMPTOM:

Vehicle moves when it is pushed forward or backward with selector lever in “P” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Do the self-diagnostic results indicate PNP switch circuit?

YES

>> Check PNP switch circuit. Refer to 

CVT-81, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"

 .

NO

>> GO TO 2.

2. 

CHECK CONTROL CABLE

Check control cable. Refer to 

CVT-212, "Checking of CVT Position"

OK or NG

OK

>> GO TO 3.

NG

>> Adjust control cable. Refer to 

CVT-211, "Adjustment of

CVT Position"

 .

3. 

CHECK SYMPTOM

Check again. Refer to 

CVT-48, "Check at Idle"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Replace the transaxle assembly. Refer to 

CVT-229, "Removal and Installation"

 .

SCIA2001E

TROUBLE DIAGNOSIS FOR SYMPTOMS

CVT-191

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CVT

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2006 Murano

In “N” Position, Vehicle Moves

NCS0018Y

SYMPTOM:

Vehicle moves forward or backward when selecting “N” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Do the self-diagnostic results indicate PNP switch circuit?

YES

>> Check PNP switch circuit. Refer to 

CVT-81, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"

 .

NO

>> GO TO 2.

2. 

CHECK CONTROL CABLE

Check control cable. Refer to 

CVT-212, "Checking of CVT Position"

OK or NG

OK

>> GO TO 3.

NG

>> Adjust control cable. Refer to 

CVT-211, "Adjustment of

CVT Position"

 .

3. 

CHECK CVT FLUID LEVEL

Check CVT fluid level. Refer to 

CVT-15, "Checking CVT Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill CVT fluid.

4. 

CHECK SYMPTOM

Check again. Refer to 

CVT-48, "Check at Idle"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 5.

5. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

CVT-57, "TCM Input/Output Signal Reference Values"

 .

2.

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

OK or NG

OK

>> Replace the transaxle assembly. Refer to 

CVT-229, "Removal and Installation"

 .

NG

>> Repair or replace damaged parts.

SCIA2001E

SAT638A

CVT-192

TROUBLE DIAGNOSIS FOR SYMPTOMS

Revision: 2006 August

2006 Murano

Large Shock “N” 

→

 “R” Position

NCS0018Z

SYMPTOM:

There is large shock when shifting from “N” to “R” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis check. Refer to 

CVT-65, "SELF-DIAGNOSTIC RESULT MODE"

 .

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system. Refer to 

CVT-65, "Display Items List"

 .

NO

>> GO TO 2.

2. 

CHECK ENGINE IDLE SPEED

Check the engine idle speed. Refer to 

EC-73, "Idle Speed and Ignition Timing Check"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Repair.

3. 

CHECK CVT FLUID LEVEL

Check CVT fluid level. Refer to 

CVT-15, "Checking CVT Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill CVT fluid.

4. 

CHECK LINE PRESSURE

Check line pressure at idle. Refer to 

CVT-44, "LINE PRESSURE

TEST"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Check the malfunctioning item. Refer to 

CVT-45, "Judg-

ment of Line Pressure Test"

 .

5. 

SYMPTOM CHECK

Check again. Refer to 

CVT-48, "Check at Idle"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

SAT638A

SAT494G