2008 NISSAN TEANA ECU

TM-258
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
P1740 LOCK-UP SELECT SOLENOID VALVE
P1740 LOCK-UP SELECT SOLENOID VALVE
DescriptionINFOID:0000000003806464
 The lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake
pressure).
 When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.
DTC LogicINFOID:0000000003806465
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 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P1740 LU-SLCT SOL/CIRC” detected?
YES >> Go to TM-258, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003806466
1.CHECK LOCK-UP SELECT 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.
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1740 LU-SLCT SOL/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. Lock-up select solenoid valve
 Harness or connectors
(Solenoid circuit is open or
shorted.)
RANGE : “D” and “N” positions
(At each time, wait for 5 seconds.)
TCM vehicle side harness connector
GroundResistance (Approx.)
Connector Terminal
F23 37 17.0 – 38.0 Ω

P1777 STEP MOTOR
TM-261
< COMPONENT DIAGNOSIS >[CVT: RE0F10A]
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P1777 STEP MOTOR
DescriptionINFOID:0000000003806471
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:0000000003806472
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. Start engine.
2. Drive vehicle for at least 5 consecutive seconds.
3. Select “Self Diagnostic Results” mode for “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P1777 STEP MOTR CIRC” detected?
YES >> Go to TM-261, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003806473
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. Step motor
 Harness or connectors
(Step motor circuit is open or
shorted.)
TCM vehicle side harness connector
Resistance (Approx.)
Connector Terminal
F2327 28
30.0 Ω
29 30

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

TCM
TM-275
< ECU DIAGNOSIS >[CVT: RE0F10A]
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ECU DIAGNOSIS
TCM
Reference ValueINFOID:0000000003806487
VALUES ON THE DIAGNOSIS TOOL
Item name Condition Display value (Approx.)
VSP SENSOR During drivingApproximately matches the speedometer
reading.
ESTM VSP SIG During drivingApproximately matches the speedometer
reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.
ENG SPEED SIG Engine running Closely matches the tachometer reading.
SEC HYDR SEN “N” position idle 1.0 V
PRI HYDR SEN “N” position idle 0.7 – 3.5 V
ATF TEMP SEN*When CVT fluid temperature is 20°C (68°F) 2.0 V
When CVT fluid temperature is 80°C (176°F) 1.0 V
VIGN SEN Ignition switch: ON Battery voltage
VEHICLE SPEED During drivingApproximately matches the speedometer
reading.
PRI SPEED During driving (lock-up ON) Approximately matches the engine speed.
SEC SPEED During driving45 X Approximately matches the speedom-
eter reading.
ENG SPEED Engine running Closely matches the tachometer reading.
GEAR RATIO During driving 2.34 – 0.39
ACC PEDAL OPENReleased accelerator pedal - Fully depressed acceler-
ator pedal0.0/8 – 8.0/8
SEC PRESS “N” position idle 1.3 MPa
STM STEP During driving−20 step – 190 step
ISOLT1Lock-up “OFF” 0.0 A
Lock-up “ON” 0.7 A
ISOLT2Release foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A
ISOLT3 Secondary pressure low - Secondary pressure high 0.8 – 0.0 A
SOLMON1Lock-up “OFF” 0.0 A
Lock-up “ON” 0.7 A
SOLMON2“N” position idle 0.8 A
When stalled 0.3 – 0.6 A
SOLMON3“N” position idle 0.6 – 0.7 A
When stalled 0.4 – 0.6 A
P POSITION SWSelector lever in “P” position On
Other than the above position. Off
R POSITION SWSelector lever in “R” position On
Other than the above position. Off
N POSITION SWSelector lever in “N“ position On
Other than the above position. Off

TM-276
< ECU DIAGNOSIS >[CVT: RE0F10A]
TCM
*Means CVT fluid temperature. Convert numerical values for actual fluid temperature °C (°F). Refer to TM-301, "ATFTEMP COUNT
Conversion Table".
TERMINAL LAYOUT
D POSITION SWSelector lever in “D” position On
Other than the above position. Off
L POSITION SWSelector lever in “L” position On
Other than the above position. Off
BRAKE SWDepressed brake pedal On
Released brake pedal Off
FULL SWFully depressed accelerator pedal On
Released accelerator pedal Off
IDLE SWReleased accelerator pedal On
Fully depressed accelerator pedal Off
SPORT MODE SWWhile pushing sport mode switch On
Other conditions Off
INDLRNGSelector lever in “L” position On
When setting selector lever to other positions. Off
INDDRNGSelector lever in “D” position On
When setting selector lever to other positions. Off
INDNRNGSelector lever in “N“ position On
When setting selector lever to other positions. Off
INDRRNGSelector lever in “R” position On
When setting selector lever to other positions. Off
INDPRNGSelector lever in “P” position On
When setting selector lever to other positions. Off
SPORT MODE INDWhen sport mode On
Other conditions Off
SMCOIL A During driving Changes On ⇔ Off.
SMCOIL B During driving Changes On ⇔ Off.
SMCOIL C During driving Changes On ⇔ Off.
SMCOIL D During driving Changes On ⇔ Off.
LUSEL SOL OUTSelector lever in “P” and “N” positions On
Wait at least for 5 seconds with the selector lever in “R”
and “D” positionsOff
LUSEL SOL MONSelector lever in “P” and “N” positions On
Wait at least for 5 seconds with the selector lever in “R”
and “D” positionsOff
ABS ONABS operate On
Other conditions Off
RANGESelector lever in “N” and “P” position N·P
Selector lever in “R” position R
Selector lever in “D” position D
Selector lever in “L” position L Item name Condition Display value (Approx.)

TCM
TM-277
< ECU DIAGNOSIS >[CVT: RE0F10A]
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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-278
< ECU DIAGNOSIS >[CVT: RE0F10A]
TCM
*: A circuit tester cannot be used to test this item.26
(L/O)Ground Sensor power OutputIgnition switch ON 5.0 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
(SB)GroundInput speed sensor (Prima-
ry speed sensor)Input When driving [“L” position, 20 km/h (12 MPH)] 950 Hz
34
(LG/R)GroundOutput speed sensor (Sec-
ondary speed sensor)Input When driving [“D” position, 20 km/h (12 MPH)] 490 Hz
37
(V/R)GroundLock-up select solenoid
valveOutput Ignition switch ONSelector lever in “P” or “N” posi-
tions Battery
voltage
Wait at least for 5 seconds with
the selector lever in “R” or “D”
positions.0 V
38
(L/W)GroundTorque converter clutch so-
lenoid valveOutputWhen vehicle cruis-
es in “D” positionWhen CVT performs lock-up 6.0 V
When CVT does not perform
lock-up1.5 V
39
(W/B)GroundPressure control solenoid
valve B (Secondary pres-
sure solenoid valve)Output
“P” or “N” position
idle Release your foot from the ac-
celerator pedal.5.0 – 7.0
V
Press the accelerator pedal all
the way down.3.0 – 4.0
V
40
(R/Y)GroundPressure control solenoid
valve A (Line pressure so-
lenoid valve)Output Release your foot from the ac-
celerator pedal.5.0 – 7.0
V
Press the accelerator pedal all
the way down.1.0 V
42
(B)Ground Ground Output Always 0 V
45
(L/R)GroundPower supply
(memory back-up)Input AlwaysBattery
voltage
46
(Y)Ground Power supply InputIgnition switch ONBattery
voltage
Ignition switch OFF 0 V
47
(L/R)GroundPower supply
(memory back-up)Input AlwaysBattery
voltage
48
(Y)Ground Power supply InputIgnition switch ONBattery
voltage
Ignition switch OFF 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-279
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Wiring Diagram - CVT CONTROL SYSTEM -INFOID:0000000003806488
JCDWM0248GB