ECU NISSAN TEANA 2008 Service Manual

P1723 CVT SPEED SENSOR FUNCTION
TM-91
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P1723 CVT SPEED SENSOR FUNCTION
DescriptionINFOID:0000000003849027
The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of
parking gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle
speed.
The input speed sensor (primary speed sensor) detects the primary pulley revolution speed and sends the sig-
nal to the TCM.
DTC LogicINFOID:0000000003849028
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 5 consecutive seconds.
Is
“P1723 CVT SPD SEN/FNCTN” detected?
YES >> Go to TM-91, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849029
1.CHECK STEP MOTOR FUNCTION
Perform “Self-Diagnostic Results” mode for “TRANSMISSION”.
Is
“P1778 STEP MOTR/FNC” detected?
YES >> Repair or replace damaged parts. Refer to TM-100, "DTC Logic".
NO >> GO TO 2.
2.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system. Refer to TM-55, "
DTC Logic".
Is the inspection result normal?
DTCItem
(CONSULT-III screen term)Malfunction is detected when... Possible cause
P1723 CVT SPD SEN/FNCTNA rotation sensor error is detected when the
gear does not change in accordance with
the position of the stepping motor.
CAUTION:
One of the “P0720 VEH SPD SEN/CIR
AT”, the “P0715 INPUT SPD SEN/CIRC”
or the “P0725 ENGINE SPEED SIG“ is
displayed with the DTC at the same time. Harness or connectors
(Sensor circuit is open or shorted.)
 Output speed sensor (secondary speed
sensor)
 Input speed sensor (primary speed sen-
sor)
 Engine speed signal system
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
Driving location : Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.

TM-94
< COMPONENT DIAGNOSIS >[CVT: RE0F09B]
P1740 LOCK-UP SELECT SOLENOID VALVE
P1740 LOCK-UP SELECT SOLENOID VALVE
DescriptionINFOID:0000000003849033
 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:0000000003849034
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 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P1740 LU-SLCT SOL/CIRC” detected?
YES >> Go to TM-94, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-35, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000003849035
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.
2.CHECK HARNESS BETWEEN TCM AND CVT UNIT (LOCK-UP SELECT SOLENOID VALVE) (PART 1)
1. Disconnect CVT unit connector.
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. Harness or connectors
(Solenoid circuit is open or shorted.)
 Lock-up select solenoid valve
RANGE : “D”, “N” and “L” position
(At each time, wait for 5 seconds.)
TCM vehicle side harness connector
GroundResistance (Approx.)
Connector Terminal
F23 37 6.0 – 19.0 Ω

P1777 STEP MOTOR
TM-97
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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-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

TCM
TM-111
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ECU DIAGNOSIS
TCM
Reference ValueINFOID:0000000003849059
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 0.5 - 0.8 V
PRI HYDR SEN “N” position idle 0.7 - 3.5 V
ATFTEMP COUNT* When CVT fluid temperature is 20°C (68°F). 47
When CVT fluid temperature is 80°C (176°F). 161
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 driving50 X Approximately matches the speedom-
eter reading.
ENG SPEED Engine running Closely matches the tachometer reading.
GEAR RATIO During driving 2.37 - 0.43
ACC PEDAL OPENReleased accelerator pedal - Fully depressed
accelerator pedal0.0/8 - 8.0/8
SEC PRESS “N” position idle 0.5 - 0.9 MPa
PRI PRESS “N” position idle 0.3 - 0.9 MPa
STM STEP During driving -20 step – 190 step
ISOLT1Lock-up OFF 0.0 A
Lock-up ON 0.7 A
ISOLT2Release your foot from the accelerator pedal. 0.8 A
Press the accelerator pedal all the way down. 0.0 A
ISOLT3Secondary pressure low - Secondary pressure
high.0.8 - 0.0 A
SOLMON1Lock-up OFF 0.0 A
Lock-up ON 0.6 - 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
INH SW3MSelector lever in “D” and “L” positions On
Selector lever in “P”, “R” and “N” positions Off
INH SW4Selector lever in “R” and “D” positions On
Selector lever in “P”, “N” and “L” positions Off

TM-112
< ECU DIAGNOSIS >[CVT: RE0F09B]
TCM
INH SW3Selector lever in “D” and “L” positions On
Selector lever in “P”, “R” and “N” positions Off
INH SW2Selector lever in “N”, “D” and “L” positions On
Selector lever in “P” and “R” positions Off
INH SW1Selector lever in “R”, “N” and “D” positions On
Selector lever in “P” and “L” positions 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
Selector lever in other positions Off
INDDRNGSelector lever in “D” position On
Selector lever in other positions Off
INDNRNGSelector lever in “N” position On
Selector lever in other positions Off
INDRRNGSelector lever in “R” position On
Selector lever in other positions Off
INDPRNGSelector lever in “P” position On
Selector lever in other positions Off
SPORT MODE INDWhen sport mode On
Other conditions Off
SMCOIL D During driving Changes ON ⇔ OFF.
SMCOIL C During driving Changes ON ⇔ OFF.
SMCOIL B During driving Changes ON ⇔ OFF.
SMCOIL A 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”, “D” and “L” positionsOff
LUSEL SOL MONSelector lever in “P” and “N” positions On
Wait at least for 5 seconds with the selector lever
in “R”, “D” and “L” positionsOff
STRTR RLY OUTSelector lever in “P” and “N” positions On
Selector lever in other positions Off
STRTR RLY MONSelector lever in “P” and “N” positions On
Selector lever in other positions Off
VDC ONVDC operate On
Other conditions Off
TCS ONTCS operate On
Other conditions Off Item name Condition Display value (Approx.)

TCM
TM-113
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* Means CVT fluid temperature. Convert numerical values for actual fluid temperature °C (°F). Refer to TM-139, "ATFTEMP COUNT
Conversion Table".
TERMINAL LAYOUT
PHYSICAL VALUES
ABS ONABS operate On
Other conditions Off
RANGESelector lever in “N” and “P” positions. 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.)
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 PNP switch 2 Input
Ignition switch ONSelector lever in “N” and “D” and
“L” positions0 V
Selector lever in other positions10.0 V –
Battery
voltage
2
(P/L)Ground PNP switch 3 InputSelector lever in “D” and “L” po-
sitions0 V
Selector lever in other positions10.0 V –
Battery
voltage
3
(G/O)Ground PNP switch 4 InputSelector lever in “R” and “D” po-
sitions0 V
Selector lever in other positions10.0 V –
Battery
voltage
4
(GR)Ground PNP switch 3 (monitor) InputSelector lever in “D” and “L” po-
sitions0 V
Selector lever in other positions10.0 V –
Battery
voltage
5
(B)Ground Ground Output Always 0 V
6
(O)Ground K-LINE Input/Output — —
7
(W)Ground Sensor ground Output Always 0 V
8
(G/W)— CLOCK (SEL2) — — —

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-115
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*: A circuit tester cannot be used to test this item.38
(L/W)GroundTorque converter clutch so-
lenoid valveOutputWhen vehicle drive
in “D” positionWhen CVT performs lock-up 6.0 V
When CVT does not perform
lock-up1.0 V
39
(W/B)GroundPressure control solenoid
valve B (Secondary pres-
sure solenoid valve)Output
“N” positions 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 – 3.0
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 OutputIgnition switch ON —Battery
voltage
Ignition switch OFF — 0 V
47
(L/R)GroundPower supply
(memory back-up)Input AlwaysBattery
voltage
48
(Y)Ground Power supply OutputIgnition switch ON —Battery
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

TM-116
< ECU DIAGNOSIS >[CVT: RE0F09B]
TCM
Wiring Diagram - CVT CONTROL SYSTEM -
INFOID:0000000003849060
JCDWM0243GB