Nissan Cube. Manual — part 971
TM-140
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0841 TRANSMISSION FLUID PRESSURE SEN/SW A
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
4.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check secondary pressure solenoid valve. Refer to
TM-140, "Component Inspection (Secondary Pressure
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
5.
CHECK STEP MOTOR SYSTEM
Check step motor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace transaxle assembly. Refer to
NO
>> Repair or replace damaged parts.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000009949005
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000009949006
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
2
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
3
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
P0868 TRANSMISSION FLUID PRESSURE
TM-141
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
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M
A
B
TM
N
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P
P0868 TRANSMISSION FLUID PRESSURE
Description
INFOID:0000000009949007
Secondary pressure solenoid valve regulates the secondary pressure to suit the driving condition in response
to a signal sent from the TCM.
DTC Logic
INFOID:0000000009949008
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.
PRECONDITIONING
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.
Start the engine.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Select “RANGE”, “ATF TEMP SEN”, “ACC PEDAL OPEN”, “BRAKESW” and “VEHICLE SPEED”.
4.
Drive the vehicle.
5.
Maintain the following conditions for 30 seconds or more.
6.
Stop the vehicle.
7.
Select “Self Diagnostic Results” in “TRANSMISSION”.
Is “P0868” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009949009
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-209, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-209, "Inspection and Judgment"
.
2.
CHECK LINE PRESSURE SOLENOID VALVE
1.
Turn ignition switch OFF.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0868
Transmission Fluid Pressure
Low
TCM detects that secondary pressure is ex-
cessively low against target secondary
pressure while the vehicle is in ordinary
driving
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary pressure solenoid valve sys-
tem
• Line pressure control system
• Secondary pressure sensor
RANGE
: D
ATF TEMP SEN
: 2.41 V or less
ACC PEDAL OPEN
: 0.5/8 – 1.0/8
BRAKESW
: Off
VEHICLE SPEED
: More than 40 km/h (25 MPH)
TM-142
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0868 TRANSMISSION FLUID PRESSURE
2.
Disconnect CVT unit harness connector.
3.
Check line pressure solenoid valve. Refer to
TM-142, "Component Inspection (Line Pressure Solenoid
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
3.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check secondary pressure solenoid valve. Refer to
TM-142, "Component Inspection (Secondary Pressure
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Secondary pressure solenoid valve is malfunctioning. 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.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace transaxle assembly. Refer to
NO
>> Repair or replace damaged parts.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000009949010
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
Component Inspection (Secondary Pressure Solenoid Valve)
INFOID:0000000009949011
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
2
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
3
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
P0868 TRANSMISSION FLUID PRESSURE
TM-143
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
YES
>> INSPECTION END
NO
>> Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
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