Nissan Murano. Instruction — 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]
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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)
1
U0100, U1000, U1010, P1709
2
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
*1
Trouble diagnosis name
Reference
“TRANSMISSION” with
CONSULT
MIL
*2
, “ENGINE” with CON-
SULT or GST
P0615
—
STARTER RELAY
P0703
—
BRAKE SWITCH B
P0705
P0705
T/M RANGE SENSOR A
P0710
P0710
FLUID TEMP SENSOR A
P0715
P0715
INPUT SPEED SENSOR A
P0720
P0720
INPUT SPEED SENSOR A
P0725
—
ENGINE SPEED
P0740
P0740
TORQUE CONVERTER
P0744
P0744
TORQUE CONVERTER
P0745
P0745
PC SOLENOID A
P0746
P0746
PC SOLENOID A
P0776
P0776
PC SOLENOID B
P0778
P0778
PC SOLENOID B
P0840
P0840
FLUID PRESS SEN/SW A
P0841
—
FLUID PRESS SEN/SW A
P0845
P0845
FLUID PRESS SEN/SW B
P0868
—
FLUID PRESS LOW
P1701
—
TCM
P1705
—
TP SENSOR
P1709
—
INCOMPLETED DATA WRITING
P1722
—
VEHICLE SPEED
P1723
—
SPEED SENSOR
P1726
—
THROTTLE CONTROL SIGNAL
P1740
P1740
SLCT SOLENOID
P1745
—
LINE PRESSURE CONTROL
P1777
P1777
STEP MOTOR
P1778
P1778
STEP MOTOR
U0100
U0100
LOST COMM (ECM A)
U1000
U1000
CAN COMM CIRCUIT
U1010
—
CONTROL UNIT (CAN)
SYSTEM SYMPTOM
TM-129
< SYMPTOM DIAGNOSIS >
[CVT: RE0F09B]
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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
1
Shift Shock
Large shock. (“N”
→
“D” position)
ON vehicle
1. Engine idle speed
2. Engine speed signal
3. Accelerator pedal position sensor
4. CVT position
5. CVT fluid temperature sensor
6. CAN communication line
7. CVT fluid level and state
8. Line pressure test
9. Torque converter clutch solenoid valve
10. Lock-up select solenoid valve
11. Transmission range switch
OFF vehicle
12. Forward clutch
13. Control valve
2
Large shock. (“N”
→
“R” position)
ON vehicle
1. Engine idle speed
2. Engine speed signal
3. Accelerator pedal position sensor
4. CVT position
5. CVT fluid temperature sensor
6. CAN communication line
7. CVT fluid level and state
8. Line pressure test
9. Torque converter clutch solenoid valve
10. Lock-up select solenoid valve
11. Transmission range switch
OFF vehicle
12. Reverse brake
13. Control valve
3
Shock is too large for
lock-up.
ON vehicle
1. CVT position
2. Engine speed signal
3. CAN communication line
4. CVT fluid level and state
OFF vehicle
5. Torque converter
6. Control valve
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