Trans NISSAN TEANA 2008 Service Manual

P1740 LOCK-UP SELECT SOLENOID VALVE
TM-95
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
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2. Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT 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 LOCK-UP SELECT SOLENOID VALVE
Check lock-up select solenoid valve. Refer to TM-95, "
Component Inspection (Lock-up Select Solenoid
Va l v e )".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace transaxle assembly. Refer to TM-168, "
Exploded View".
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-153, "Exploded View".
NO >> Repair or replace damaged parts.
Component Inspection (Lock-up Select Solenoid Valve)INFOID:0000000003849036
1.CHECK LOCK-UP SELECT 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".
TCM vehicle side harness connector CVT unit vehicle side harness connector
Continuity
Connector Terminal Connector Terminal
F2337F2413Existed
TCM vehicle side harness connector
GroundContinuity
Connector Terminal
F23 37 Not existed
CVT unit connector
GroundResistance (Approx.)
Connector Terminal
F24 13 6.0 – 19.0 Ω

TM-96
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P1745 LINE PRESSURE CONTROL
P1745 LINE PRESSURE CONTROL
DescriptionINFOID:0000000003849037
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:0000000003849038
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.
Is
“P1745 L/PRESS CONTROL” detected?
YES >> Go to TM-96, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849039
1.CHECK DTC
With CONSULT-III
1. Start engine.
2. Perform “Self-Diagnostic Results” mode for “TRANSMISSION”.
Is
“P1745 L/PRESS CONTROL” detected?
YES >> Replace TCM. Refer to TM-153, "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 CONTROL TCM 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)

P1777 STEP MOTOR
TM-97
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
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P1777 STEP MOTOR
DescriptionINFOID:0000000003849040
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.
DTC LogicINFOID:0000000003849041
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.
1.CHECK DTC DETECTION
With CONSULT-III
1. Start engine.
2. Drive vehicle for at least 5 consecutive seconds.
3. Perform “Self-Diagnostic Results” mode for “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P1777 STEP MOTR CIRC” detected?
YES >> Go to TM-97, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849042
1.CHECK STEP MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM vehicle side harness connector terminals.
4. Check resistance between TCM vehicle side harness connector terminals and ground.
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1777 STEP MOTR CIRCEach coil of the step motor is not energized
properly due to an open or a short. Harness or connectors
(Step motor circuit is open or shorted.)
Step motor
TCM vehicle side harness connector
Resistance (Approx.)
Connector Terminal
F2327 28
30.0 Ω
29 30
TCM vehicle side harness connector
GroundResistance (Approx.)
Connector Terminal
F2327
15.0 Ω 28
29
30

TM-98
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P1777 STEP MOTOR
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 1)
1. Disconnect CVT unit connector.
2. Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side har-
ness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK HARNESS BETWEEN TCM AND CVT UNIT (STEP MOTOR) (PART 2)
Check continuity between TCM vehicle side harness connector terminals and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK STEP MOTOR
Check step motor. Refer to TM-98, "
Component Inspection (Step Motor)".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace transaxle assembly. Refer to TM-168, "
Exploded View".
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-153, "Exploded View".
NO >> Repair or replace damaged parts.
Component Inspection (Step Motor)INFOID:0000000003849043
1.CHECK STEP MOTOR
1. Check resistance between CVT unit connector terminals.
TCM vehicle side harness connector CVT unit vehicle side harness connector
Continuity
Connector Terminal Connector Terminal
F2327
F249
Existed 28 8
29 7
30 6
TCM vehicle side harness connector
GroundContinuity
Connector Terminal
F2327
Not existed 28
29
30
CVT unit connector
Resistance (Approx.)
Connector Terminals
F2467
30.0 Ω
89

P1777 STEP MOTOR
TM-99
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2. Check resistance between CVT unit connector terminals and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace transaxle assembly. Refer to TM-168, "
Exploded View".
CVT unit connector
GroundResistance (Approx.)
Connector terminal
F246
15.0 Ω 7
8
9

TM-100
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P1778 STEP MOTOR - FUNCTION
P1778 STEP MOTOR - FUNCTION
DescriptionINFOID:0000000003849044
 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:0000000003849045
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-100, "
Diagnosis 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 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-100, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849046
1.CHECK STEP MOTOR SYSTEM
Check step motor system. Refer to TM-97, "
Description".
Is the inspection result normal?
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1778 STEP MOTR/FNCThere is a big difference between the num-
ber of steps for the stepping motor and for
the actual gear ratio.Ste p m ot or
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-102
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
DescriptionINFOID:0000000003849047
 TCM sends position indicator signals to combination meter via CAN communication line.
 The selector lever position is indicated on the shift position indicator.
Component Function CheckINFOID:0000000003849048
1.CHECK SHIFT POSITION INDICATOR
CAUTION:
Always drive vehicle at a safe speed.
1. Start engine.
2. Check that correct selector lever position (“P”, “R”, “N”, “D”, “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-102, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003849049
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “RANGE” on “Data Monitor” and read out the value.
3. Check that correct selector lever position (“P”, “R”, “N”, “D”, “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES >> INSPECTION END
NO-1 (CVT position indicator does not indicate “L” when selector lever is moved into “L”.)>>Check the fol-
lowing.
 Check sport mode switch. Refer to TM-108, "
Description".
 Check CVT main system (Fail-safe function actuated).
- Perform “Self-Diagnostic Results” mode for “TRANSMISSION”.
NO-2 (The actual gear position changes, but the shift position indicator is not indicated.)>>Perform “Self-
Diagnostic Results” mode for “TRANSMISSION”.
NO-3 (The actual gear position and the indication on the shift position indicator do not coincide.)>>Perform
“Self-Diagnostic Results” mode for “TRANSMISSION”.
NO-4 (Only a specific position or positions is/are not indicated on the shift position indicator.)>>Check the
combination meter. Refer to MWI-33, "
CONSULT-III Function (METER/M&A)".

TM-108
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
SPORT MODE SWITCH
SPORT MODE SWITCH
DescriptionINFOID:0000000003858969
 The sport mode switch is installed to the selector lever knob.
 When pushing the sport mode switch (SPORT indicator lamp turns ON), the driving condition becomes sport
mode. When pushing again the sport mode switch (SPORT indicator lamp turns OFF), the driving condition
changes to D range.
Component Function CheckINFOID:0000000003858970
1.CHECK SPORT MODE SWITCH SIGNAL
1. Turn ignition switch ON.
2. Select “Data Monitor” mode for “TRANSMISSION”.
3. Check the On/Off operations of monitor item.
Is the inspection result normal?
YES >> INSPECTION END.
NO >> Go to TM-108, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003858971
1. CHECK CAN COMMUNICATION CIRCUIT
Perform “Self Diagnostic Results” mode for “TRANSMISSION”.
Is
“U1000 CAN COMM CIRCUIT” indicated?
YES >> Check CAN communication line. Refer to TM-41, "Description".
NO >> GO TO 2.
2.CHECK COMBINATION METER
Perform “Self Diagnostic Results” mode for “METER/M&A”.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check DTC detected item. Refer to MWI-67, "
DTC Index".
3.CHECK SPORT MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect control device connector.
3. Turn ignition switch ON.
4. Check voltage between control device vehicle side harness connector terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 6.
4.CHECK SPORT MODE SWITCH
Check continuity between control device connector terminals.
Monitor item Condition Status
SPORT MODE SWWhile pushing sport mode switch On
Other conditions Off
Control device vehicle side harness connector
Voltage (Approx.)
ConnectorTe r m i n a l
(+) (−)
M57 1 4 5 V

TM-114
< ECU DIAGNOSIS >[CVT: RE0F09B]
TCM
9
(L/R)— CHIP SELECT (SEL1) — — —
10
(BR/R)— DATA I/O (SEL3) — — —
11
(BR/W)Ground PNP switch 1 Input Ignition switch ONSelector lever in “R”, “N” and “D”
positions0 V
Selector lever in other positionsBattery
voltage
13
(V)GroundCVT fluid temperature sen-
sor Input Ignition switch ONWhen CVT fluid temperature is
20°C (68°F)1.9 – 2.2
V
When CVT fluid temperature is
80°C (176°F)0.8 – 1.1
V
14
(R/W)GroundTransmission fluid pres-
sure sensor B (Primary
pressure sensor)Input
“N” position idle0.5 – 0.8
V
15
(V/W)GroundTransmission fluid pres-
sure sensor A (Secondary
pressure sensor)Input1.0 – 1.5
V
19
(G/B)Ground Reverse lamp relay Output Ignition switch ONSelector lever in “R” position 0 V
Selector lever in other positionsBattery
voltage
20
(R/B)Ground Starter relay Output Ignition switch ONSelector lever in “N”, “P” posi-
tionsBattery
voltage
Selector lever in other positions 0 V
25
(W/R)Ground Sensor ground Output Always 0 V
26
(L/O)Ground Sensor power OutputIgnition switch ON —4.75 –
5.25 V
Ignition switch OFF — 0 V
27
(R/G)Ground Step motor D Output
Within 2 seconds after ignition switch ON, measure the
time using the pulse width measurement function (Hi
level) of CONSULT-III.*
CAUTION:
Connect the diagnosis data link cable to the vehicle
diagnosis connector.10.0
msec
28
(R)Ground Step motor C Output30.0
msec
29
(O/B)Ground Step motor B Output10.0
msec
30
(G/R)Ground Step motor A Output30.0
msec
31
(P)— CAN-L Input/Output — —
32
(L)— CAN-H Input/Output — —
33
(LG)GroundInput speed sensor (Prima-
ry speed sensor)InputWhen driving at 20 km/h (12 MPH) in “L” position, use
the CONSULT-III pulse frequency measuring function.680 Hz
34
(LG/R)GroundOutput speed sensor (Sec-
ondary speed sensor)InputWhen driving at 20 km/h (12 MPH) in “D” position, use
the CONSULT-III pulse frequency measuring function.400 Hz
37
(V/R)GroundLock-up select solenoid
valveOutput Ignition switch ONSelector lever in “P”, “N” posi-
tions Battery
voltage
Wait at least for 5 seconds with
the selector lever in “R”, “D” and
“L” positions.0 V Te r m i n a l N o .
(Wire color)Description
ConditionVa l u e
(Approx.)
+ - Signal name Input/Output

TCM
TM-121
< ECU DIAGNOSIS >[CVT: RE0F09B]
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P Output Speed Sensor (Secondary Speed Sensor)
The shift pattern is changed in accordance with the throttle position when an unexpected signal is sent from
the output speed sensor (secondary speed sensor) to the TCM. The sport mode is inhibited, and the transaxle
is put in “D”.
Input Speed Sensor (Primary Speed Sensor)
The shift pattern is changed in accordance with the throttle position and secondary speed (vehicle speed)
when an unexpected signal is sent from the input speed sensor (primary speed sensor) to the TCM. The sport
mode is inhibited, and the transaxle is put in “D”.
PNP Switch
If an unexpected signal is sent from the PNP switch to the TCM, the transaxle is put in “D”.
CVT Fluid Temperature Sensor
If an unexpected signal is sent from the CVT fluid temperature sensor to the TCM, the gear ratio in use before
receiving the unexpected signal is maintained or the gear ratio is controlled to keep engine speed under 5,000
rpm.
Transmission Fluid Pressure Sensor A (Secondary Pressure Sensor)
 If an unexpected signal is sent from the transmission fluid pressure sensor A (secondary pressure sensor) to
the TCM, the secondary pressure feedback control is stopped and the offset value obtained before the non-
standard condition occurs is used to control line pressure.
 If transmission fluid pressure sensor A (secondary pressure sensor) error signal is inputted to the TCM, sec-
ondary pressure feedback control stops, but line pressure is controlled normally.
Pressure Control Solenoid A (Line Pressure Solenoid Valve)
If an unexpected signal is sent from the solenoid valve to the TCM, the pressure control solenoid A (line pres-
sure solenoid valve) is turned OFF to achieve the maximum fluid pressure.
Pressure Control Solenoid B (Secondary Pressure Solenoid Valve)
If an unexpected signal is sent from the solenoid valve to the TCM, the pressure control solenoid B (secondary
pressure solenoid valve) is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the torque converter clutch solenoid valve
is turned OFF to cancel the lock-up.
Ste p M oto r
If an unexpected signal is sent from the step motor to the TCM, the step motor coil phases “A” through “D” are
all turned OFF to hold the gear ratio used just before the non-standard condition occurred.
CVT Lock-up Select Solenoid Valve
If an unexpected signal is sent from the solenoid valve to the TCM, the CVT lock-up select solenoid valve is
turned OFF to cancel the lock-up.
TCM Power Supply (Memory Back-up)
Transaxle assembly is protected by limiting the engine torque when the memory back-up power supply (for
controlling) from the battery is not supplied to the TCM. Normal status is restored when turning the ignition
switch OFF to ON after the normal power supply.
DTC Inspection Priority ChartINFOID:0000000003849062
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000 CAN COMM CIRCUIT” is indicated with other DTCs, start from a diagnosis for “DTC
U1000 CAN COMMUNICATION LINE”. Refer to TM-41
.
DTC IndexINFOID:0000000003849063
NOTE:
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above