2008 NISSAN TEANA Trans

P1777 STEP MOTOR
TM-263
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Component Inspection (Step Motor)INFOID:0000000003806474
1.STEP MOTOR
Check resistance between CVT unit connector terminals and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the transaxle assembly. Refer to TM-332, "
Exploded View".
CVT unit connector
Resistance (Approx.)
Connector Terminal
F2467
30.0 Ω
89
CVT unit connector
GroundResistance (Approx.)
Connector Terminal
F246
15.0 Ω 7
8
9

TM-264
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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-266
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
DescriptionINFOID:0000000003806478
TCM sends position indicator signals to combination meter via CAN communication line.
Component Function CheckINFOID:0000000003806479
1.CHECK SHIFT POSITION INDICATOR
CAUTION:
Always drive vehicle at a safe speed.
1. Start engine.
2. Check that correct selector lever position (“P”, “N”, “R”, “D” or “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-266, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003806480
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “RANGE” on “Data Monitor” mode for “TRANSMISSION” and read out the value.
3. Check that correct selector lever position (“P”, “N”, “R”, “D” or “L”) is displayed as selector lever is moved
into each position.
Is the inspection result normal?
YES >> INSPECTION END
NO-1 [The actual gear position does not change, or shifting into the manual mode is not possible (no gear
shifting in the manual mode possible). Or the shift position indicator is not indicated.]>>Check the following.
 Check sport mode switch. Refer to TM-272, "
Description".
 Check CVT main system (Fail-safe function actuated).
- Check “Self Diagnostic Results” mode for “TRANSMISSION”.
NO-2 (The actual gear position changes, but the shift position indicator is not indicated.)>>
 Check “Self Diagnostic Results” mode for “TRANSMISSION”.
NO-3 (The actual gear position and the indication on the shift position indicator do not coincide.)>>
 Check “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)".

SHIFT LOCK SYSTEM
TM-267
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SHIFT LOCK SYSTEM
DescriptionINFOID:0000000003806481
Wiring Diagram - CVT SHIFT LOCK SYSTEM -INFOID:0000000003806482
Component Function
Shift lock solenoidIt operates according to the signal from the stop lamp switch and
moves the lock lever.
Lock leverIt moves according to the operation of the shift lock solenoid and
performs the release of the shift lock.
Detent rodIt links with the selector button and restricts the selector lever
movement.
Park position switch It detects that the selector lever is in P position.
Key interlock cable and key interlock rod It transmits the lock lever operation to the slider in the key cylinder.
Shift lock release button It moves the lock lever forcibly.

TM-272
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
SPORT MODE SWITCH
SPORT MODE SWITCH
DescriptionINFOID:0000000003847160
 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:0000000003847161
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-272, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003847162
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-208, "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

TCM
TM-277
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PPHYSICAL VALUES
SCIA6679J
Te r m i n a l N o .
(wire color)Description
ConditionVa l u e
(Approx.)
+−Signal name Input/Output
1
(P/B)Ground R RANGE SW Input
Ignition switch ONSelector lever in “R” positionBattery
voltage
Other than the above position 0 V
2
(P/L)Ground N RANGE SW InputSelector lever in “N” positionBattery
voltage
Other than the above position 0 V
3
(G/O)Ground D RANGE SW InputSelector lever in “D” positionsBattery
voltage
Other than the above position 0 V
4
(GR)Ground L RANGE SW InputSelector lever in “L” positionBattery
voltage
Other than the above position 0 V
5
(B)Ground Ground Output Always 0 V
6
(O)Ground K-LINE Input/Output — —
7
(W)Ground Sensor ground Input Always 0 V
8
(G/W)— CLOCK (SEL2) — — —
9
(L/R)— CHIP SELECT (SEL1) — — —
10
(BR/R)— DATA I/O (SEL3) — — —
11
(BR/W)Ground P RANGE SW Input Ignition switch ONSelector lever in “P” positionBattery
voltage
Other than the above position 0 V
13
(V)GroundCVT fluid temperature sen-
sor Input Ignition switch ONWhen CVT fluid temperature is
20°C (68°F)2.0 V
When CVT fluid temperature is
80°C (176°F)1.0 V
15
(V/W)GroundTransmission fluid pres-
sure sensor A (Secondary
pressure sensor)Input “N” position idle 1.0 V
25
(W/R)Ground Sensor ground Input Always 0 V

TM-284
< ECU DIAGNOSIS >[CVT: RE0F10A]
TCM
Output Speed Sensor (Secondary Speed Sensor)
The shift pattern is changed in accordance with throttle position when an unexpected signal is sent from the
output speed sensor (secondary speed sensor) to the TCM. The manual mode is inhibited, and the transaxle
is put in “D”.
Input Speed Sensor (Primary Speed Sensor)
The shift pattern is changed in accordance with 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 manual
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 5000
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 input to TCM, secondary
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 to the TCM, the pressure control solenoid A (line pressure
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 to the TCM, the pressure control solenoid B (secondary pres-
sure 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 to the TCM, the torque converter clutch solenoid valve is
turned OFF to cancel the lock-up.
Step Motor
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 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 TCM. Normal status is restored when turning the ignition switch
OFF to ON after the normal power supply.
DTC Inspection Priority ChartINFOID:0000000003806490
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 displayed with other DTCs, first perform the trouble diagnosis
for “DTC U1000 CAN COMMUNICATION LINE”. Refer to TM-208
.
DTC IndexINFOID:0000000003806491
NOTE:
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

TCM
TM-285
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If DTC “U1000 CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis
for “DTC U1000 CAN COMMUNICATION LINE”. Refer to TM-208
.
*1: These numbers are prescribed by ISO 15031-6.
*2: Refer to TM-202, "
Diagnosis Description". DTC
*1
Items
(CONSULT-III screen terms)Reference MI*2, “ENGINE” with
CONSULT-III or
GSTCONSULT-III only
“TRANSMISSION”
— P0703 BRAKE SW/CIRCTM-210
P0705 P0705 PNP SW/CIRCTM-213
P0710 P0710 ATF TEMP SEN/CIRCTM-216
P0715 P0715 INPUT SPD SEN/CIRCTM-218
P0720 P0720 VEH SPD SEN/CIR ATTM-222
— P0725 ENGINE SPEED SIGTM-226
— P0730 BELT DAMGTM-228
P0740 P0740 TCC SOLENOID/CIRCTM-230
P0744 P0744 A/T TCC S/V FNCTNTM-232
P0745 P0745 L/PRESS SOL/CIRCTM-234
P0746 P0746 PRS CNT SOL/A FCTNTM-236
P0776 P0776 PRS CNT SOL/B FCTNTM-238
P0778 P0778 PRS CNT SOL/B CIRCTM-240
P0840 P0840 TR PRS SENS/A CIRCTM-242
— P0841 PRESS SEN/FNCTNTM-245
— P0868 SEC/PRESS DOWNTM-247
— P1701 TCM-POWER SUPPLYTM-249
— P1705 TP SEN/CIRC A/TTM-252
— P1722 ESTM VEH SPD SIGTM-253
— P1723 CVT SPD SEN/FNCTNTM-255
— P1726 ELEC TH CONTROLTM-257
P1740 P1740 LU-SLCT SOL/CIRCTM-258
— P1745 L/PRESS CONTROLTM-260
P1777 P1777 STEP MOTR CIRCTM-261
P1778 P1778 STEP MOTR/FNCTM-264
U1000 U1000 CAN COMM CIRCUITTM-208
— U1010 CONTROL UNIT (CAN)TM-209