2008 NISSAN TEANA Service Manual

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Page 4545 of 5121

NISSAN TEANA 2008 Service Manual TM-72
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE
SOLENOID VALVE)
P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
Des

TM-72
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE
SOLENOID VALVE)
P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)
DescriptionINFOID:0000000003848998
The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the oil pump discharge
pressure to suit the driving condition in response to the signal sent from the TCM.
DTC LogicINFOID:0000000003848999
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” mode for “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0778 PRS CNT SOL/B CIRC” detected?
YES >> Go to TM-72, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849000
1.CHECK PRESSURE CONTROL SOLENOID VALVE B (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 PRESSURE CONTROL SOLENOID VALVE B (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.
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P0778 PRS CNT SOL/B CIRC 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.)
Pressure control solenoid valve B (sec-
ondary pressure solenoid valve)
TCM vehicle side harness connector
GroundResistance (Approx.)
Connector Terminal
F23 39 3.0 – 9.0 Ω

Page 4546 of 5121

NISSAN TEANA 2008 Service Manual P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE
SOLENOID VALVE)
TM-73
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Is the inspection result normal?
YES >> GO TO 3.

Page 4547 of 5121

NISSAN TEANA 2008 Service Manual TM-74
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-
SOR)
P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE
SENSOR)
DescriptionINFOID:000000

TM-74
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-
SOR)
P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE
SENSOR)
DescriptionINFOID:0000000003849002
The transmission fluid pressure sensor A (secondary pressure sensor) detects secondary pressure of CVT
and sends the signal to the TCM.
DTC LogicINFOID:0000000003849003
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” mode for “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 TR PRS SENS/A CIRC” detected?
YES >> Go to TM-74, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849004
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 connector terminals.
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P0840 TR PRS SENS/A CIRCSignal 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.)
Transmission fluid pressure sensor A
(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
GroundCondition Voltage (Approx.)
Connector Terminal
F23 15 “N” position idle 1.0 - 1.5 V

Page 4548 of 5121

NISSAN TEANA 2008 Service Manual P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-
SOR)
TM-75
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Is the inspection result normal?
YES >> GO TO 3.
NO >> GO

Page 4549 of 5121

NISSAN TEANA 2008 Service Manual TM-76
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
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

Page 4550 of 5121

NISSAN TEANA 2008 Service Manual P0841 PRESSURE SENSOR FUNCTION
TM-77
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
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P0841 PRESSURE SENSOR FUNCTION
DescriptionINFOID:0000000003849005
Using the engine load (thro

P0841 PRESSURE SENSOR FUNCTION
TM-77
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P0841 PRESSURE SENSOR FUNCTION
DescriptionINFOID:0000000003849005
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:0000000003849006
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. 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-77, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849007
1.CHECK LINE PRESSURE
Perform line pressure test. Refer to TM-146, "
Inspection and Judgment".
Is the inspection result normal?
YES >> .GO TO 2.
NO >> Repair or replace damaged parts. Refer to TM-146, "
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-74, "
Descrip-
tion".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY PRESSURE SENSOR) SYSTEM
Check transmission fluid pressure sensor B (primary pressure sensor) system. Refer to TM-80, "
Description".
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P0841 PRESS SEN/FNCTNCorrelation between the values of the trans-
mission fluid pressure sensor A (secondary
pressure sensor) and the transmission fluid
pressure sensor B (primary pressure sen-
sor) is out of specification. Harness or connectors
(Sensor circuit is open or shorted.)
Transmission fluid pressure sensor A
(secondary pressure sensor)
Transmission fluid pressure sensor B (pri-
mary pressure sensor)
VEHICLE SPEED : 40 km/h (25 MPH) or more
RANGE : “D” position

Page 4551 of 5121

NISSAN TEANA 2008 Service Manual TM-78
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0841 PRESSURE SENSOR FUNCTION
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK PRESSURE CONTROL SOLENOID VAL

TM-78
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P0841 PRESSURE SENSOR FUNCTION
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector.
3. Check pressure control solenoid valve A (line pressure solenoid valve). Refer to TM-78, "
Component
Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)]".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to TM-78, "
Component
Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace damaged parts.
6.CHECK STEP MOTOR SYSTEM
Check step motor system. Refer to TM-97, "
Description".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace damaged parts.
7.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-153, "Exploded View".
NO >> Repair or replace damaged parts.
Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid
Va l v e ) ]
INFOID:0000000003849008
1.CHECK PRESSURE CONTROL SOLENOID VALVE A (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 TM-168, "
Exploded View".
Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure So-
lenoid Valve)]
INFOID:0000000003849009
1.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
Check resistance between CVT unit connector terminal and ground.
CVT unit connector
GroundResistance (Approx.)
Connector Terminal
F24 2 3.0 – 9.0 Ω
CVT unit connector
GroundResistance (Approx.)
Connector Terminal
F24 3 3.0 – 9.0 Ω

Page 4552 of 5121

NISSAN TEANA 2008 Service Manual P0841 PRESSURE SENSOR FUNCTION
TM-79
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
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Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace transaxle assembly. Refe

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