2008 NISSAN TEANA sensor

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

P1778 STEP MOTOR - FUNCTION
TM-101
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YES >> GO TO 2.
NO >> Repair or replace damaged parts.
2.CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check input speed sensor (primary speed sensor) system. Refer to TM-52, "
Description".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system. Refer to TM-55, "
Description".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.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.

TCM
TM-111
< ECU DIAGNOSIS >[CVT: RE0F09B]
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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

TCM
TM-113
< ECU DIAGNOSIS >[CVT: RE0F09B]
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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

TM-120
< ECU DIAGNOSIS >[CVT: RE0F09B]
TCM
Fail-safe
INFOID:0000000003849061
The TCM has an electrical fail-safe mode. In this mode TCM operates even if there is an error in a main elec-
tronic control input/output signal circuit.
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid valve, this function controls the CVT to make driving possi-
ble.
JCDWM0247GB

TCM
TM-121
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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

SYSTEM SYMPTOM
TM-123
< SYMPTOM DIAGNOSIS >[CVT: RE0F09B]
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SYMPTOM DIAGNOSIS
SYSTEM SYMPTOM
Symptom TableINFOID:0000000003849064
The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
No. Item Symptom Condition Diagnostic item Reference
1
Shift ShockLarge shock. (“N”→
“D” position)ON vehicle1. Engine idle speedEC-14
2. Engine speed signalTM-59
3. Accelerator pedal position sensorTM-88
4. CVT positionTM-152
5. CVT fluid temperature sensorTM-50
6. CAN communication lineTM-41
7. CVT fluid level and stateTM-142
8. Line pressure testTM-146
9. Torque converter clutch solenoid valveTM-62
10. Lock-up select solenoid valveTM-94
11. PNP switchTM-44
OFF vehicle12. Forward clutch
TM-16813. Control valve
2Large shock. (“N”→
“R” position)ON vehicle1. Engine idle speedEC-14
2. Engine speed signalEC-14
3. Accelerator pedal position sensorTM-88
4. CVT positionTM-152
5. CVT fluid temperature sensorTM-50
6. CAN communication lineTM-41
7. CVT fluid level and stateTM-142
8. Line pressure testTM-146
9. Torque converter clutch solenoid valveTM-62
10. Lock-up select solenoid valveTM-94
11. PNP switchTM-44
OFF vehicle12. Reverse brake
TM-16813. Control valve
3Shock is too large for
lock-up.ON vehicle1. CVT positionTM-152
2. Engine speed signalTM-59
3. CAN communication lineTM-41
4. CVT fluid level and stateTM-142
OFF vehicle5. Torque converterTM-1726. Control valveTM-168