Nissan Teana J32. Instruction — part 1180
TM-244
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-
SOR)
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace damaged parts.
7.
CHECK TCM
1.
Replace with the same type of TCM. Refer to
.
2.
Connect each connector.
3.
Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
Is “P0840 TR PRS SENS/A CIRC” detected?
YES
>> Replace transaxle assembly. Refer to
NO
8.
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.
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F23
25
Not existed
26
P0841 PRESSURE SENSOR FUNCTION
TM-245
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
C
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P0841 PRESSURE SENSOR FUNCTION
Description
INFOID:0000000003806439
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signals, TCM changes the operating pressure of the primary pulley and the secondary pul-
ley and changes the groove width of the pulley to control the gear ratio.
DTC Logic
INFOID:0000000003806440
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.
Perform the following procedure to confirm the malfunction is eliminated after the repair.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” mode for “TRANSMISSION”.
3.
Start engine and maintain the following conditions for at least 12 consecutive seconds.
Is “P0841 PRESS SEN/FNCTN” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-35, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000003806441
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-308, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-308, "Inspection and Judgment"
.
2.
CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYS-
TEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)
DTC
Item
(CONSULT-III screen term)
Malfunction is detected when...
Possible cause
P0841
PRESS SEN/FNCTN
Secondary pressure became
higher than line pressure.
• Transmission fluid pressure
sensor A (secondary pres-
sure sensor)
• Harness or connectors
(Sensor circuit is open or
shorted.)
VEHICLE SPEED
: 40 km/h (25 MPH) More than
RANGE
: “D” position
TM-246
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
P0841 PRESSURE SENSOR FUNCTION
Check line pressure solenoid valve. Refer to
TM-246, "Component Inspection [Pressure Control Solenoid
Valve A (Line Pressure Solenoid Valve)]"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check secondary pressure solenoid valve. Refer to
TM-246, "Component Inspection [Pressure Control Sole-
noid Valve B (Secondary Pressure Solenoid Valve)]"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
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.
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 [Pressure Control Solenoid Valve A (Line Pressure Solenoid
Valve)]
INFOID:0000000003806442
1.
CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the transaxle assembly. Refer to
.
Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure So-
lenoid Valve)]
INFOID:0000000003806443
1.
CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the transaxle assembly. Refer to
.
CVT unit harness connector
Ground
Resistance (Approx.)
Connector
Terminal
F24
2
3.0 – 9.0
Ω
CVT unit harness connector
Ground
Resistance (Approx.)
Connector
Terminal
F24
3
3.0 – 9.0
Ω
P0868 SECONDARY PRESSURE DOWN
TM-247
< COMPONENT DIAGNOSIS >
[CVT: RE0F10A]
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TM
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P0868 SECONDARY PRESSURE DOWN
Description
INFOID:0000000003806444
The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary pressure
to suit the driving condition in response to the signal sent from the TCM.
DTC Logic
INFOID:0000000003806445
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF. Then wait at least 10 seconds before performing the next test.
Perform the following procedure to confirm the malfunction is eliminated after the repair.
1.
CHECK DTC DETECTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “Data Monitor” mode for “TRANSMISSION”.
3.
Make sure that output voltage of CVT fluid temperature sensor is within the range specified below.
4.
Start engine and maintain the following conditions for at least 10 consecutive seconds.
Is “P0868 SEC/PRESS DOWN” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-35, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000003806446
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-308, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-308, "Inspection and Judgment"
.
DTC
Item
(CONSULT-III screen term)
Malfunction is detected when...
Possible cause
P0868
SEC/PRESS DOWN
Secondary fluid pressure is too
low compared with the com-
manded value while driving.
• Harness or connectors
(Solenoid circuit is open or
shorted.)
• Pressure control solenoid
valve B (secondary pressure
solenoid valve) system
• Transmission fluid pressure
sensor A (secondary pres-
sure sensor)
• Line pressure control system
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)
VEHICLE SPEED (accelerate
slowly)
: 0
→
50 km/h (31 MPH)
ACC PEDAL OPEN
: 0.5/8 – 1.0/8
RANGE
: “D” position
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