Nissan Murano. Manual - part 1396

TM-126

< ECU DIAGNOSIS INFORMATION >

[CVT: RE0F09B]

TCM

Fail-safe

INFOID:0000000009719540

The TCM has an electrical fail-safe mode. In this mode TCM operates even if there is an error in a main elec-
tronic control input/output signal circuit.

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid valve, this function controls the CVT to make driving possi-
ble.

JRDWC1701GB

TCM

TM-127

< ECU DIAGNOSIS INFORMATION >

[CVT: RE0F09B]

Secondary Speed Sensor

The shift pattern is changed in accordance with the throttle position when an unexpected signal is sent from
the secondary speed sensor to the TCM. The overdrive control mode is inhibited, and the transaxle is put in
“D”.

Primary Speed Sensor

The shift pattern is changed in accordance with the throttle position and secondary speed (vehicle speed)
when an unexpected signal is sent from the primary speed sensor to the TCM. The overdrive control mode is
inhibited, and the transaxle is put in “D”.

Transmission range Switch

If an unexpected signal is sent from the transmission range switch to the TCM, the transaxle is put in “D”.

CVT Fluid Temperature Sensor

If an unexpected signal is sent from the CVT fluid temperature sensor to the TCM, the gear ratio in use before
receiving the unexpected signal is maintained or the gear ratio is controlled to keep engine speed under 5,000
rpm.

Secondary Pressure Sensor

• If an unexpected signal is sent from the secondary pressure sensor to the TCM, the secondary pressure

feedback control is stopped and the offset value obtained before the non-standard condition occurs is used
to control line pressure.

• If secondary pressure sensor error signal is inputted to the TCM, secondary pressure feedback control

stops, but line pressure is controlled normally.

Line Pressure Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the line pressure solenoid valve is turned
OFF to achieve the maximum fluid pressure.

Secondary Pressure Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the secondary pressure solenoid valve is
turned OFF to achieve the maximum fluid pressure.

Torque Converter Clutch Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the torque converter clutch solenoid valve
is turned OFF to cancel the lock-up.

Step Motor

If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are
all turned OFF to hold the gear ratio used just before the non-standard condition occurred.

Lock-up Select Solenoid Valve

If an unexpected signal is sent from the solenoid valve to the TCM, the lock-up select solenoid valve is turned
OFF to cancel the lock-up.

TCM Power Supply (Memory Back-up)

Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for
controlling) from the battery is not supplied to the TCM. Normal status is restored when turning the ignition
switch OFF to ON after the normal power supply.

DTC Inspection Priority Chart

INFOID:0000000009719541

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U0100”/“U1000”/“U1010”/“P1709” is indicated with other DTCs, start from a diagnosis for DTC
“U0100”/“U1000”/“U1010”/“P1709”. Refer to

(U0100),

(P1709).

Priority

Detected items (DTC)

U0100, U1000, U1010, P1709

Except above

TM-128

< ECU DIAGNOSIS INFORMATION >

[CVT: RE0F09B]

TCM

DTC Index

INFOID:0000000009719542

NOTE:
If DTC “U0100”/“U1000”/“U1010”/“P1709” is indicated with other DTCs, start from a diagnosis for DTC
“U0100”/“U1000”/“U1010”/“P1709”. Refer to

(P1709).

• *1: These numbers are prescribed by SAE J2012.

• *2: Refer to

TM-36, "Diagnosis Description"

DTC

Trouble diagnosis name

Reference

“TRANSMISSION” with

CONSULT

MIL

, “ENGINE” with CON-

SULT or GST

P0615

—

STARTER RELAY

TM-45, "DTC Logic"

P0703

—

BRAKE SWITCH B

TM-47, "DTC Logic"

P0705

T/M RANGE SENSOR A

TM-50, "DTC Logic"

P0710

FLUID TEMP SENSOR A

TM-53, "DTC Logic"

P0715

INPUT SPEED SENSOR A

TM-57, "DTC Logic"

P0720

INPUT SPEED SENSOR A

TM-60, "DTC Logic"

P0725

—

ENGINE SPEED

TM-64, "DTC Logic"

P0740

TORQUE CONVERTER

TM-65, "DTC Logic"

P0744

TORQUE CONVERTER

TM-67, "DTC Logic"

P0745

PC SOLENOID A

TM-69, "DTC Logic"

P0746

PC SOLENOID A

TM-71, "DTC Logic"

P0776

PC SOLENOID B

TM-73, "DTC Logic"

P0778

PC SOLENOID B

TM-75, "DTC Logic"

P0840

FLUID PRESS SEN/SW A

TM-77, "DTC Logic"

P0841

—

FLUID PRESS SEN/SW A

TM-80, "DTC Logic"

P0845

FLUID PRESS SEN/SW B

TM-82, "DTC Logic"

P0868

—

FLUID PRESS LOW

TM-85, "DTC Logic"

P1701

—

TCM

TM-87, "DTC Logic"

P1705

—

TP SENSOR

TM-90, "DTC Logic"

P1709

—

INCOMPLETED DATA WRITING

TM-91, "DTC Logic"

P1722

—

VEHICLE SPEED

TM-93, "DTC Logic"

P1723

—

SPEED SENSOR

TM-95, "DTC Logic"

P1726

—

THROTTLE CONTROL SIGNAL

TM-97, "DTC Logic"

P1740

SLCT SOLENOID

TM-98, "DTC Logic"

P1745

—

LINE PRESSURE CONTROL

TM-100, "DTC Logic"

P1777

STEP MOTOR

TM-101, "DTC Logic"

P1778

STEP MOTOR

TM-104, "DTC Logic"

U0100

LOST COMM (ECM A)

TM-42, "DTC Logic"

U1000

CAN COMM CIRCUIT

TM-43, "DTC Logic"

U1010

—

CONTROL UNIT (CAN)

TM-44, "DTC Logic"

SYSTEM SYMPTOM

TM-129

< SYMPTOM DIAGNOSIS >

[CVT: RE0F09B]

SYMPTOM DIAGNOSIS

SYSTEM SYMPTOM

Symptom Table

INFOID:0000000009719543

The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.

No.

Item

Symptom

Condition

Diagnostic item

Reference

Shift Shock

Large shock. (“N”

→

“D” position)

ON vehicle

1. Engine idle speed

EC-18

2. Engine speed signal

TM-64

3. Accelerator pedal position sensor

TM-90

4. CVT position

TM-164

5. CVT fluid temperature sensor

TM-53

6. CAN communication line

TM-43

7. CVT fluid level and state

TM-151

8. Line pressure test

TM-158

9. Torque converter clutch solenoid valve

TM-65

10. Lock-up select solenoid valve

TM-98

11. Transmission range switch

TM-50

OFF vehicle

12. Forward clutch

TM-180

13. Control valve

Large shock. (“N”

→

“R” position)

ON vehicle

1. Engine idle speed

EC-18

2. Engine speed signal

TM-64

3. Accelerator pedal position sensor

TM-90

4. CVT position

TM-164

5. CVT fluid temperature sensor

TM-53

6. CAN communication line

TM-43

7. CVT fluid level and state

TM-151

8. Line pressure test

TM-158

9. Torque converter clutch solenoid valve

TM-65

10. Lock-up select solenoid valve

TM-98

11. Transmission range switch

TM-50

OFF vehicle

12. Reverse brake

TM-180

13. Control valve

Shock is too large for
lock-up.

ON vehicle

1. CVT position

TM-164

2. Engine speed signal

TM-64

3. CAN communication line

TM-43

4. CVT fluid level and state

TM-151

OFF vehicle

5. Torque converter

TM-183

6. Control valve

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