Nissan Murano Z51. Instruction — part 1430
P0776 PRESSURE CONTROL SOLENOID B
TM-71
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
YES
>> GO TO 3.
NO
>> Replace transaxle assembly. Refer to
3.
CHECK LINE PRESSURE SOLENOID VALVE
Check line pressure solenoid valve. Refer to
TM-71, "Component Inspection (Line Pressure Solenoid Valve)"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace transaxle assembly. Refer to
4.
CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000005514012
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000005514013
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
CVT unit connector
Ground
Resistance (Approx.)
Connector
Terminal
F24
2
3.0 – 9.0
Ω
CVT unit connector
Ground
Resistance (Approx.)
Connector
Terminal
F24
3
3.0 – 9.0
Ω
TM-72
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0778 PRESSURE CONTROL SOLENOID B
P0778 PRESSURE CONTROL SOLENOID B
Description
INFOID:0000000005514014
The secondary pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition
in response to a signal sent from the TCM.
DTC Logic
INFOID:0000000005514015
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.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Start engine.
2.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
3.
Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0778” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005514016
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect TCM connector.
3.
Check resistance between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TCM AND SECONDARY PRESSURE SOLENOID VALVE (PART 1)
1.
Disconnect CVT unit connector.
2.
Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0778
Pressure Control Solenoid B
Electrical
• 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.)
• Secondary pressure solenoid valve
TCM vehicle side harness connector
Ground
Resistance (Approx.)
Connector
Terminal
F23
39
3.0 – 9.0
Ω
TCM vehicle side harness connector
CVT unit vehicle side harness connector
Continuity
Connector
Terminal
Connector
Terminal
F23
39
F24
3
Existed
P0778 PRESSURE CONTROL SOLENOID B
TM-73
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK HARNESS BETWEEN TCM AND SECONDARY PRESSURE SOLENOID VALVE (PART 2)
Check continuity between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check secondary pressure solenoid valve. Refer to
TM-73, "Component Inspection (Secondary Pressure
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace transaxle assembly. Refer to
5.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000005514017
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F23
39
Not existed
CVT unit connector
Ground
Resistance (Approx.)
Connector
Terminal
F24
3
3.0 – 9.0
Ω
TM-74
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
P0840 TRANSMISSION FLUID PRESSURE SEN/SW A
Description
INFOID:0000000005514018
The secondary pressure sensor detects secondary pressure of CVT and sends a signal to the TCM.
DTC Logic
INFOID:0000000005514019
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.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Make sure that output voltage of CVT fluid temperature sensor is within the range below.
4.
Start engine and wait for at least 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0840” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005514020
1.
CHECK INPUT SIGNAL
1.
Start engine.
2.
Check voltage between TCM connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 2.
2.
CHECK POWER AND SENSOR GROUND
Check voltage between TCM terminals.
Is the inspection result normal?
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0840
Transmission Fluid Pressure
Sensor/Switch A Circuit
Signal voltage of the transmission fluid pres-
sure sensor A (secondary pressure sensor)
is too high or too low while driving.
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary pressure sensor
ATF TEMP SEN
: 1.0 – 2.0 V
If it is 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)
TCM connector
Ground
Condition
Voltage (Approx.)
Connector
Terminal
F23
15
“N” position idle
1.0 – 1.5 V
TCM connector
Voltage (Approx.)
Connector
Terminal
F23
25
26
4.75 – 5.25 V
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