2008 NISSAN TIIDA PN switch

CVT-4
DTC P1740 LOCK-UP SELECT SOLENOID
VALVE CIRCUIT ..............................................
132
Description .............................................................132
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
132
On Board Diagnosis Logic .....................................132
Possible Cause ......................................................132
DTC Confirmation Procedure ................................132
Wiring Diagram - CVT - L/USSV ............................133
Diagnosis Procedure .............................................134
Component Inspection ...........................................135
DTC P1745 LINE PRESSURE CONTROL ......136
Description .............................................................136
On Board Diagnosis Logic .....................................136
Possible Cause ......................................................136
DTC Confirmation Procedure ................................136
Diagnosis Procedure .............................................136
DTC P1777 STEP MOTOR - CIRCUIT ............137
Description .............................................................137
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
137
On Board Diagnosis Logic .....................................137
Possible Cause ......................................................137
DTC Confirmation Procedure ................................137
Wiring Diagram - CVT - STM .................................138
Diagnosis Procedure .............................................139
Component Inspection ...........................................140
DTC P1778 STEP MOTOR - FUNCTION ........141
Description .............................................................141
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
141
On Board Diagnosis Logic .....................................141
Possible Cause ......................................................141
DTC Confirmation Procedure ................................141
Diagnosis Procedure .............................................142
OVERDRIVE CONTROL SWITCH ..................143
Description .............................................................143
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
143
Wiring Diagram - CVT - ODSW .............................144
Diagnosis Procedure .............................................144
Component Inspection ...........................................146
SHIFT POSITION INDICATOR CIRCUIT ........148
Description .............................................................148
CONSULT-III Reference Value in Data Monitor
Mode ......................................................................
148
Diagnosis Procedure .............................................148
TROUBLE DIAGNOSIS FOR SYMPTOMS .....149
Wiring Diagram - CVT - NONDTC .........................149
O/D OFF Indicator Lamp Does Not Come On ......151
Engine Cannot Be Started in "P" and "N" Position .153
In "P" Position, Vehicle Moves Forward or Back-
ward When Pushed ...............................................
153
In "N" Position, Vehicle Moves ..............................154
Large Shock "N" → "R" Position ...........................154
Vehicle Does Not Creep Backward in "R" Position .155
Vehicle Does Not Creep Forward in "D" or "L" Po-
sition ......................................................................
156
Vehicle Speed Does Not Change in "L" Position ..157
Vehicle Speed Does Not Change in overdrive-off
mode .....................................................................
158
Vehicle Speed Does Not Change in "D" Position .159
Vehicle Does Not Decelerate by Engine Brake ....159
TRANSMISSION CONTROL MODULE ...........161
Removal and Installation .......................................161
CVT SHIFT LOCK SYSTEM .............................162
Description ............................................................162
Shift Lock System Electrical Parts Location ..........162
Wiring Diagram - CVT - SHIFT .............................163
Diagnosis Procedure .............................................163
SHIFT CONTROL SYSTEM .............................167
Removal and Installation .......................................167
Control Device Disassembly and Assembly .........170
Selector Lever Knob Removal and Installation .....170
Adjustment of CVT Position ..................................171
Checking of CVT Position .....................................171
KEY INTERLOCK CABLE ...............................173
Removal and Installation .......................................173
AIR BREATHER HOSE ....................................176
Removal and Installation .......................................176
DIFFERENTIAL SIDE OIL SEAL .....................177
Removal and Installation .......................................177
TRANSAXLE ASSEMBLY ...............................178
Removal and Installation .......................................178
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
181
General Specification ............................................181
Vehicle Speed When Shifting Gears .....................181
Stall Speed ............................................................181
Line Pressure ........................................................181
Solenoid Valves ....................................................182
CVT Fluid Temperature Sensor ............................182
Primary Speed Sensor ..........................................182
Secondary Speed Sensor .....................................182
Removal and Installation .......................................182

PRECAUTIONS
CVT-7
< SERVICE INFORMATION >
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PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001703424
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000001703425
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for On Board Diagnosis (OBD) System of CVT and EngineINFOID:0000000001703426
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

CVT-8
< SERVICE INFORMATION >
PRECAUTIONS
• Be sure to turn the ignition switch OFF and disconnect the battery cable from the negative terminal
before any repair or inspection work. The open/short circuit of related switches, sensors, solenoid
valves, etc. will cause the MIL to light up.
• Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.
• Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EVAP system or fuel injection system, etc.
• Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
Service After Replacing TCM and Transaxle AssemblyINFOID:0000000001703427
SERVICE AFTER REPLACING TCM AND TRANSAXLE ASSEMBLY
Perform the applicable service in the following sheet when replacing TCM or transaxle assembly
CAUTION:
• Do not start the engine until the service is completed.
• “A/T C/U POWER SUPPLY [P1701]” may be indicated soon after replacing TCM or transaxle assem-
bly (after erasing the memory at the pattern B). Restart the self-diagnosis after erasing the self-diag-
nosis result. Check that no error is detected.
NOTE:
Old unit means that the unit has been already used for another vehicle.
PATTERN A
1. Shift the selector lever to “P” position after replacing TCM. Turn the ignition switch ON.
2. Check that the shift position indicator in the combination meter turns ON (It indicates approximately 1 or 2
seconds after turning the ignition switch ON.)
• Check the following items if the shift position indicator does not turn ON. Repair or replace the shift posi-
tion indicator if necessary.
- The harness between TCM and ROM ASSY in the transaxle assembly is open or short.
- Cable disconnected, loosen, or bent from the connector housing.
PATTERN B
1. Turn the ignition switch ON after replacing each part.
2. Start engine.
CAUTION:
Do not start the driving.
3. Touch CONSULT-III screen in the order of “START (NISSAN BASED VHCL)”, “TRANSMISSION”, “DATA
MONITOR”, and “MAIN SIGNALS”.
4. Warm up the transaxle assembly until “ATFTEMPCOUNT” indicates 47 [approximately 20°C (68°F)] or
more. Turn the ignition switch OFF.
5. Turn the ignition switch ON.
CAUTION:
Do not start engine.
6. Select “SELF-DIAG RESULTS”.
7. Shift the selector lever to “R” position.
8. Depress slightly the accelerator pedal (Pedal angle: 2/8) while depressing the brake pedal.
9. Perform “ERASE”.
TCM CVT assemblyService pattern
Replace the new unit. Do not replace the unit. "PATTERN A"
Do not replace the unit. Replace the new or old unit.
"PATTERN B"
Replace the old unit.Do not replace the unit.
Replace the new or old unit.
Replace the new unit. Replace the new or old unit. "PATTERN C"

PRECAUTIONS
CVT-9
< SERVICE INFORMATION >
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10. Shift the selector lever to “R” position after replacing TCM. Turn the ignition switch OFF.
11. Wait approximately 10 minutes after turning the ignition switch OFF.
12. Turn the ignition switch ON while shifting the selector lever to “R” position.
CAUTION:
Do not start engine.
13. Select “CALIBRATION DATA”.
14. Check that the value on “CALIBRATION DATA” is same as the data after erasing "Calibration Data".
• Restart the procedure from step 3 if the values are not same.
15. Shift the selector lever to “P” position.
16. Check that the shift position indicator in the combination meter turns ON (It indicates approximately 1 or 2
seconds after shifting the selector lever to “P” position.)
• Check the following items if the shift position indicator does not turn ON. Repair or replace the shift posi-
tion indicator if necessary.
- The harness between TCM and ROM ASSY in the transaxle assembly is open or short.
- Cable disconnected, loosen, or bent from the connector housing.
- Power supply and ground of TCM. Refer to CVT-121
.
PATTERN C
1. Replace the transaxle assembly first, and then replace TCM.
2. Perform the service of “PATTERN A”.
(Perform the service of “Pattern B” if TCM is replaced first.)
Removal and Installation Procedure for CVT Unit ConnectorINFOID:0000000001703428
REMOVAL
Rotate bayonet ring counterclockwise, pull out CVT unit harness
connector upward and disconnect it.
INSTALLATION
1. Align CVT unit harness connector terminal body marking with
bayonet ring marking, insert CVT unit harness connector, and
then rotate bayonet ring clockwise.
SCIA2096E
SCIA2097E

CVT-10
< SERVICE INFORMATION >
PRECAUTIONS
2. Rotate bayonet ring clockwise until CVT unit harness connector
terminal body marking is aligned with the bayonet ring marking
(linear slit) as shown.
CAUTION:
• Securely align CVT unit harness connector terminal body
marking with bayonet ring marking (linear slit). Do not
make a half fit condition as shown.
• Do not mistake the bayonet ring marking (linear slit) for
other dent portion.
PrecautionINFOID:0000000001703429
NOTE:
If any malfunction occurs in the RE0F08A model transaxle, replace the entire transaxle assembly.
•Before connecting or disconnecting the TCM harness connec-
tor, turn ignition switch OFF and disconnect negative battery
cable. Because battery voltage is applied to TCM even if igni-
tion switch is turned OFF.
•When connecting or disconnecting pin connectors into or
from TCM, take care not to damage pin terminals (bend or
break).
When connecting pin connectors make sure that there are not
any bends or breaks on TCM pin terminal.
SCIA2098E
SCIA2099E
SEF289H
SEF291H

CVT-20
< SERVICE INFORMATION >
CVT SYSTEM
Hydraulic Control System
INFOID:0000000001703438
TCM FunctionINFOID:0000000001703439
The function of the TCM is to:
• Receive input signals sent from various switches and sensors.
• Determine required line pressure, shifting point, and lock-up operation.
• Send required output signals to the step motor and the respective solenoids.
CONTROL SYSTEM OUTLINE
The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.
SCIA1807E
SENSORS (or SIGNAL)
⇒TCM
⇒ACTUATORS
PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Overdrive control signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Primary pressure sensor
Secondary pressure sensorShift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line
Duet-EA control
CAN system
On board diagnosisSte p m ot or
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid
valve
Shift position indicator
O/D OFF indicator lamp
Starter relay

CVT-22
< SERVICE INFORMATION >
CVT SYSTEM
Input/Output Signal of TCM
INFOID:0000000001703441
*1: Input by CAN communications.
*2: Output by CAN communications.
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
Line Pressure and Secondary Pressure ControlINFOID:0000000001703442
• When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM
controls the line pressure solenoid valve and secondary pressure solenoid valve.
• This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the pres-
sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving
state. Secondary pressure is controlled by decreasing line pressure.
NORMAL CONTROL
Control itemFluid
pressure
controlSelect con-
trolShift controlLock-up
controlCAN com-
munication
controlFail-safe
function
(*3)
InputPNP switch XXXXXX
Accelerator pedal position signal
(*1)XXXXXX
Closed throttle position signal
(*1)X XXX
Engine speed signal
(*1)XX XXX
CVT fluid temperature sensor X X X X X
Stop lamp switch signal
(*1)X XXX
Overdrive control signal
(*1)XX
Primary speed sensor X X X X X
Secondary speed sensor X X X X X X
Primary pressure sensor X X
Secondary pressure sensor X X X
TCM power supply voltage signal X X X X X X
Out-
putStep motor X X
TCC solenoid valve X X X
Lock-up select solenoid valve X X X
Line pressure solenoid valve X X X X
Secondary pressure solenoid valve X X X
O/D OFF indicator signal
(*2)XX
SCIA1846E

CVT SYSTEM
CVT-23
< SERVICE INFORMATION >
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Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle position, the engine speed, the primary pulley (input) revolution speed, the secondary pulley (output) revo-
lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, and the fluid pressure.
FEEDBACK CONTROL
When controlling the normal fluid pressure or the selected fluid pressure, the secondary pressure can be set
more accurately by using the fluid pressure sensor to detect the secondary pressure and controlling the feed-
back.
Shift ControlINFOID:0000000001703443
In order to select the gear ratio which can obtain the driving force in accordance with driver's intention and the
vehicle condition, TCM monitors the driving conditions, such as the vehicle speed and the throttle position and
selects the optimum gear ratio, and determines the gear change steps to the gear ratio. Then send the com-
mand to the step motor, and control the flow-in/flow-out of line pressure from the primary pulley to determine
the position of the moving-pulley and control the gear ratio.
NOTE:
The gear ratio is set for every position separately.
“D” POSITION
Shifting over all the ranges of gear ratios from the lowest to the high-
est.
OVERDRIVE-OFF MODE
Use this position for the improved engine braking.
“L” POSITION
SCIA7958E
SCIA1953E