check transmission fluid NISSAN TEANA 2008 Workshop Manual

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 TM-315, "
Exploded View".
2. Connect each connector.
3. Perform “DTC CONFIRMATION PROCEDURE”. Refer to TM-242, "
DTC Logic".
Is
“P0840 TR PRS SENS/A CIRC” detected?
YES >> Replace transaxle assembly. Refer to TM-332, "Exploded View".
NO >> Replace TCM. Refer to TM-315, "
Exploded View".
8.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> Replace TCM. Refer to TM-315, "Exploded View".
NO >> Repair or replace damaged parts.
TCM vehicle side harness connector
GroundContinuity
Connector Terminal
F2325
Not existed
26

P0841 PRESSURE SENSOR FUNCTION
TM-245
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
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P0841 PRESSURE SENSOR FUNCTION
DescriptionINFOID: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 LogicINFOID: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 TM-245, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID: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 TM-242, "
Descrip-
tion".
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)
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P0841 PRESS SEN/FNCTNSecondary 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

P0868 SECONDARY PRESSURE DOWN
TM-247
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
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P0868 SECONDARY PRESSURE DOWN
DescriptionINFOID: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 LogicINFOID: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 TM-247, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID: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".
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P0868 SEC/PRESS DOWNSecondary 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

TM-248
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
P0868 SECONDARY PRESSURE DOWN
2.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to TM-248, "
Component
Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]".
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)
Check pressure control solenoid valve A (line pressure solenoid valve). Refer to TM-248, "
Component Inspec-
tion [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 TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYS-
TEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to TM-242, "
Descrip-
tion".
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 >> Replace TCM. Refer to TM-315, "Exploded View".
NO >> Repair or replace damaged parts.
Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid
Va l v e ) ]
INFOID:0000000003806447
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 TM-332, "
Exploded View".
Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure So-
lenoid Valve)]
INFOID:0000000003806448
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 TM-332, "
Exploded View".
CVT unit harness connector
GroundResistance (Approx.)
Connector Terminal
F24 2 3.0 – 9.0 Ω
CVT unit harness connector
GroundResistance (Approx.)
Connector Terminal
F24 3 3.0 – 9.0 Ω

TM-260
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
P1745 LINE PRESSURE CONTROL
P1745 LINE PRESSURE CONTROL
DescriptionINFOID:0000000003806468
The pressure control solenoid valve A (line pressure solenoid valve) regulates the oil pump discharge pres-
sure to suit the driving condition in response to the signal sent from the TCM.
DTC LogicINFOID:0000000003806469
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
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 below.
Is
“P1745 L/PRESS CONTROL” detected?
YES >> Go to TM-260, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003806470
1.CHECK DTC
With CONSULT-III
1. Start engine.
2. Select “Self Diagnostic Results” mode for “TRANSMISSION”.
Is the
“P1745 L/PRESS CONTROL” displayed?
YES >> Replace TCM. Refer to TM-315, "Exploded View".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1745 L/PRESS CONTROLTCM detects the unexpected
line pressure.TCM
ATF TEMP SEN : 1.0 – 2.0 V
If 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)

TM-264
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
P1778 STEP MOTOR - FUNCTION
P1778 STEP MOTOR - FUNCTION
DescriptionINFOID:0000000003806475
 The step motor changes the step by turning 4 coils ON/OFF according to the signal from TCM. As a result,
the flow of line pressure to primary pulley is changed and pulley ratio is controlled.
 This diagnosis item is detected when the electrical system is OK, but the mechanical system is NG.
 This diagnosis item is detected when the state of the changing of the speed mechanism in the unit does not
operate normally.
DTC LogicINFOID:0000000003806476
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
 Always drive vehicle at a safe speed.
 Before starting “DTC CONFIRMATION PROCEDURE”, confirm “Hi” or “Mid” or “Low” fixation by
“PRI SPEED” and “VEHICLE SPEED” on “Data Monitor”.
 If hi-geared fixation occurred, go to TM-264, "
Diagnosis Procedure".
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 30 consecutive seconds.
With GST.
Follow the procedure “With CONSULT-III”.
Is
“P1778 STEP MOTR/FNC” detected?
YES >> Go to TM-264, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003806477
1.CHECK STEP MOTOR SYSTEM
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1778 STEP MOTR/FNCThere is a big difference be-
tween the number of steps for
the stepping motor and for the
actual gear ratio.Step motor
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)
Start test from 0 km/h (0 MPH)
Constant acceleration : Keep 30 sec or more
VEHICLE SPEED : 10 km/h (6 MPH) or more
ACC PEDAL OPEN : More than 1.0/8
RANGE : “D” position
ENG SPEED : 450 rpm or more

TM-300
< PRECAUTION >[CVT: RE0F10A]
PRECAUTIONS
Turn ignition switch OFF and disconnect negative battery
cable before connecting or disconnecting the TCM harness
connector. Because battery voltage is applied to TCM even if
ignition switch is turned OFF.
When connecting or disconnecting pin connectors into or
from TCM, do not damage pin terminals (bend or break).
Check that there are not any bends or breaks on TCM pin ter-
minal, when connecting pin connectors.
Perform TCM input/output signal inspection and check
whether TCM functions normally or not before replacing TCM.
Refer to TM-275, "
Reference Value".
Perform “DTC Confirmation Procedure” after performing each
TROUBLE DIAGNOSIS.
If the repair is completed the DTC should not be displayed in
the “DTC Confirmation Procedure”.
 Always use the specified brand of CVT fluid. Refer to MA-11, "
Flu-
ids and Lubricants".
 Use lint-free paper, not cloth rags, during work.
 Dispose of the waste oil using the methods prescribed by law, ordi-
nance, etc. after replacing the CVT fluid.
Service Notice or PrecautionINFOID:0000000003806500
OBD SELF-DIAGNOSIS
 CVT self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through
the blinking pattern of the Malfunction Indicator (MI). Refer to the table on TM-204, "
CONSULT-III Function
(TRANSMISSION)" for the indicator used to display each self-diagnostic result.
 The self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memories.
Always perform the procedure on TM-202, "
Diagnosis Description" to complete the repair and avoid
unnecessary blinking of the MIL.
For details of OBD, refer to EC-102, "
Diagnosis Description".
SEF289H
SEF291H
MEF040DA
SAT652J