2009 NISSAN TIIDA lock

CVT
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TROUBLE DIAGNOSIS
DTC Inspection Priority Chart INFOID:0000000004666880
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 CVT-60 .
Fail-Safe INFOID:0000000004666881
The TCM has an electrical fail-safe mode. This mode make s it possible to operate even if there is an error in a
main electronic control input/output signal circuit.
FAIL-SAFE FUNCTION If any malfunction occurs in a sensor or solenoid, th is function controls the CVT to make driving possible.
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 overdrive-off mode is inhibited, and the tran-
saxle 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 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 temper ature 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 3500
rpm.
Transmission Fluid Pressure Sens or A (Secondary Pressure Sensor)
• If an unexpected signal is sent from the transmission fl uid 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 pre ssure 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) If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid A (line pressure
solenoid) is turned OFF to achieve the maximum fluid pressure.
Pressure Control Solenoid B (Secondary Pressure Solenoid) If an unexpected signal is sent from the solenoid to t he TCM, the pressure control solenoid B (secondary pres-
sure solenoid) is turned OFF to achieve the maximum fluid pressure.
Torque Converter Clutch Solenoid If an unexpected signal is sent from the solenoid to t he TCM, the torque converter clutch solenoid 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 right before the non-standard condition occurred.
CVT Lock-up Select Solenoid Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

CVT-34< SERVICE INFORMATION >
[RE0F08A]
TROUBLE DIAGNOSIS
If an unexpected signal is sent from the solenoid to t he TCM, the CVT lock-up select solenoid 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 statues is restored when turning the ignition switch
OFF to ON after the normal power supply.
How to Perform Trouble Diagnosis for Quick and Accurate Repair INFOID:0000000004666882
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, PNP switch and provides shift control or lock-up
control via CVT solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used wit h the OBD-related parts of the
CVT system for malfunction-diagnostic purposes. The TCM is capa-
ble of diagnosing malfunctioning parts while the ECM can store mal-
functions in its memory.
Input and output signals must always be correct and stable in the
operation of the CVT system. The CVT system must be in good
operating condition and be free of valve seizure, solenoid valve mal-
function, etc.
It is much more difficult to diagnose an error that occurs intermit-
tently rather than continuously. Mo st intermittent errors are caused
by poor electric connections or improper wiring. In this case, careful
checking of suspected circuits ma y help prevent the replacement of
good parts.
A visual check only may not find the cause of the errors. A road test
with CONSULT-III (or GST) or a circuit tester connected should be
performed. Follow the "WORK FLOW" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such errors, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “DIAGNOSTIC WORKSHEET” as
shown on the example (Refer to "Diagnostic Worksheet Chart" )
should be used.
Start your diagnosis by looking for “conventional” errors first. This will
help troubleshoot driveability errors on an electronically controlled
engine vehicle.
Also check related Service bulletins.
WORK FLOW
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Make good use of the two sheets provided, "Informati on From Customer" and "Diagnostic Worksheet Chart" ,
to perform the best troubleshooting possible.
Work Flow Chart SAT631IB
SAT632I
SEF234G

TROUBLE DIAGNOSIS
CVT-45
< SERVICE INFORMATION >
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• Before road test, familiarize yourself with all test procedures and
items to check.
• Perform tests on all items until specified symptom is found. Trou-
bleshoot items which check out No Good after road test.
CONSULT-III START PROCEDURE • Using CONSULT-III, perform a cruise test and record the result.
• Print the result and ensure that shifts and lock-ups take place as per Shift Schedule.
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch “MAIN SIGNALS” to set recording condition.
3. See “Numerical Display”, “Barchart Display” or “Line Graph Display”.
4. Touch “START”.
5. When performing cruise test. Refer to CVT-47, " Cruise Test " .
6. After finishing cruise test part, touch “RECORD”.
7. Touch “STORE”.
8. Touch “BACK”.
9. Touch “DISPLAY”.
10. Touch “PRINT”.
11. Check the monitor data printed out.
Check before Engi ne Is Started INFOID:00000000046668871.
CHECK O/D OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF. Wait at least 5 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does O/D OFF indicator lamp come on for about 2 seconds? YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnosis and note NG items.Refer to CVT-51, " CONSULT-III Function (TRANSMISSION) " .
3. Go to CVT-45, " Check at Idle " .
NO >> Stop “Road Test”. Go to CVT-155, " O/D OFF Indicator Lamp Does Not Come On " .
Check at Idle INFOID:00000000046668881.
CHECK STARTING THE ENGINE
1. Park vehicle on flat surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch OFF.
4. Turn ignition switch START.
Is engine started? SAT496G

TROUBLE DIAGNOSIS
CVT-49
< SERVICE INFORMATION >
[RE0F08A] D
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CHECK ENGINE BRAKE FUNCTION — PART 3
1. Move selector lever to “L” position.
2. Check engine brake.
Does engine braking effectively reduce speed in “ L ” position?
YES >> 1. Stop the vehicle.
2. Perform self-diagnosis. Refer to CVT-51, " CONSULT-III Function (TRANSMISSION) " .
NO >> Mark the box of CVT-163, " Vehicle Does Not Decelerate by Engine Brake " on the
CVT-34, " How
to Perform Trouble Diagnosis for Quick and Accurate Repair " . Then continue trouble diagnosis.
Vehicle Speed When Shifting Gears INFOID:0000000004666890
Numerical value data are reference values.
CAUTION:
Lock-up clutch is engaged when vehi cle speed is approximately 18 km/h (11 MPH) to 90 km/h (56 MPH).
TCM Terminal and Reference Value INFOID:0000000004666891
TCM HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR TCM Data are reference values and are measured between each terminal and ground.
Engine type Throttle position Shift pattern
Engine speed (rpm)
At 40 km/h (25 MPH) At 60 km/h (37 MPH)
MR18DE 8/8
“D” position
Overdrive-off mode “L” position 3,600 - 4,500 4,400 - 5,300
2/8 “D” position 1,300 - 3,100 1,400 - 3,500
Overdrive-off mode 2,200 - 3,000 2,800 - 3,600 “L” position 3,200 - 4,100 3,900 - 4,800 WCIA0717E
Terminal
Wire
color Item Condition Data (Approx.)
1 GR Pressure control
solenoid valve A
(Line pressure
solenoid valve)
and Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 1.0 - 3.0 V
2 LG Pressure control
solenoid valve B
(Secondary
pressure sole-
noid valve) Release your foot from the accelerator pedal. 5.0 - 7.0 V
Press the accelerator pedal all the way down. 3.0 - 4.0 V
3 SB Torque converter
clutch solenoid
valve When vehi-
cle cruises in
“D” position. When CVT performs lock-up. 6.0 V
When CVT does not perform lock-up. 1.0 V

Item name Condition Display value (Approx.)
VSP SENSOR During driving Approximately matches the speedometer
reading.
ESTM VSP SIG*
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 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 driving Approximately matches the speedometer
reading.
PRI SPEED During driving (lock-up ON) Approximately matches the engine speed.
SEC SPEED During driving 50 X Approximately matches the speedom-
eter reading.
ENG SPEED Engine running Closely ma tches the tachometer reading.
GEAR RATIO During driving 2.56 - 0.43
ACC PEDAL OPEN Released accelerator pedal - Fully depressed
accelerator pedal 0.0/8 - 8.0/8
SEC PRESS “N” position idle 0.8 MPa
PRI PRESS “N” position idle 0.4 MPa
STM STEP During driving −20 step - 180 step
ISOLT1 Lock-up OFF 0.0 A
Lock-up ON 0.7 A
ISOLT2 Release your 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
SOLMON1 Lock-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
INH SW3M Selector lever in “D
” and “L” positions ON
Selector lever in “”, “” and “” positions OFF
INH SW4 Selector lever in “R” and “” positions ON
Selector lever in “”, “” and “” positions OFF

CVT
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VEH SPD SEN/
CIR AT • Signal from vehicle speed sensor CVT [Output speed sen-
sor (Secondary speed sensor)] not input due to open or
short circuit
• Unexpected signal input during running P0720 P0720
CVT-84ENGINE SPEED
SIG • TCM does not receive the CAN communication signal from
the ECM
• Engine speed is too low while driving P0725 —
CVT-89BELT DAMG Unexpected gear ratio detected P0730 —
CVT-91TCC SOLENOID/
CIRC Normal voltage not applied to solenoid due to open or short
circuit P0740 P0740
CVT-92A/T TCC S/V
FNCTN • CVT cannot perform lock-up even if electrical circuit is good
• TCM detects as irregular by comparing difference value with slip rotation
• There is big difference engine speed and primary speed when TCM lock-up signal is on P0744 P0744
CVT-97L/PRESS SOL/
CIRC • Normal voltage not applied to solenoid due to open or short
circuit
• TCM detects as irregular by comparing target value with monitor value P0745 P0745
CVT-99PRS CNT SOL/A
FCTN Unexpected gear ratio was detected in the LOW side due to
excessively low line pressure P0746 P0746
CVT-104PRS CNT SOL/B
FCTN Secondary pressure is too high or too low compared with the
commanded value while driving P0776 P0776
CVT-106PRS CNT SOL/B
CIRC • Normal voltage not applied to solenoid due to cut line,
short, or the like
• TCM detects as irregular by comparing target value with
monitor value P0778 P0778
CVT-108TR PRS SENS/A
CIRC Signal voltage of the transmission fluid pressure sensor A
(secondary pressure sensor) is too high or too low while driv-
ing P0840 P0840
CVT-113PRESS SEN/
FNCTN Correlation between the values of the transmission fluid pres-
sure sensor A (secondary pressure sensor) and the tranmis-
sion fluid pressure sensor B (primary pressure sensor) is out
of specification P0841 —
CVT-117TR PRS SENS/B
CIRC Signal voltage of the transmission fluid pressure sensor B
(primary pressure sensor) is too high or too low while driving P0845 P0845
CVT-119SEC/PRESS
DOWN Secondary fluid pressure is too low compared with the com-
manded value while driving P0868 —
CVT-123TCM-POWER
SUPPLY • When the power supply to the TCM is cut OFF, for example
because the battery is removed, and the self-diagnosis
memory function stops
• This is not a malfunction message (Whenever shutting OFF a power supply to the TCM, this message appears on
the screen) P1701 —
CVT-125TP SEN/CIRC A/T
TCM does not receive the proper accelerator pedal position
signals (input by CAN communication) from ECM P1705 —
CVT-129ESTM VEH SPD
SIG*2 • CAN communication with the ABS actuator and the electric
unit (control unit) is malfunctioning
• There is a great difference between the vehicle speed sig-
nal from the ABS actuator and the electric unit (control
unit), and the vehicle speed sensor signal P1722 —
CVT-131Items (CONSULT-
III screen terms) Malfunction is detected when... TCM self-di-
agnosis OBD-III (DTC)
Reference page
“TRANSMIS-
SION” with
CONSULT-III MIL indicator
lamp*1, “EN- GINE” with
CONSULT-III
or GST

Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value
ENG SPEED SIG Engine running Closely matches the tachometer reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.

Diagnosis Procedure " .
WITH GST
Follow the procedure “WITH CONSULT-III”. Item name Condition Display value (Approx.)
ISOLT1 Lock-up OFF 0.0 A
Lock-up ON 0.7 A