2008 NISSAN TEANA check engine

STC-10
< COMPONENT DIAGNOSIS >
ENGINE SPEED SIGNAL CIRCUIT
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace ECM. Refer to EC-14, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :
Description".
4.CHECK ENGINE SPEED SIGNAL (2)
1. Connect power steering control unit harness connector.
2. Check signal between power steering control unit harness connector and ground with oscilloscope.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace power steering control unit. Refer to STC-19, "
Exploded View".
5.CHECK TERMINALS AND HARNESS CONNECTORS
 Check power steering control unit pin terminals for damage or loose connection with harness connector.
 Check ECM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace damaged parts.
ECM
— Condition Voltage (Approx.)
Connector Terminal
E16 94 GroundEngine is running
 Warm-up condition
 Idle speed
Engine is running
 Warm-up condition
 Engine speed: Approx. 2,000 rpm
JSGIA0143ZZ
PBIA3655J
Power steering control unit
— Condition Voltage (Approx.)
Connector Terminal
M61 10 GroundEngine is running
 Warm-up condition
 Idle speed
Engine is running
 Warm-up condition
 Engine speed: Approx. 2,000 rpm
JSGIA0143ZZ
PBIA3655J

POWER STEERING CONTROL UNIT
STC-13
< ECU DIAGNOSIS >
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STC
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ECU DIAGNOSIS
POWER STEERING CONTROL UNIT
Reference ValueINFOID:0000000003893535
TERMINAL LAYOUT
PHYSICAL VALUES
JSGIA0023ZZ
Te r m i n a l N o .
(Wire color)Description
Condition Value (Approx.)
+ - Signal nameInput/
Output
1
(R/Y)GroundPower steering solenoid
valve voltageOutputVehicle speed: 0 km/h (0 MPH)
(Engine is running)4.4 – 6.6 V
Vehicle speed: 100 km/h (62 MPH) 2.4 – 3.6 V
3
(G/W)GroundIgnition switch power
supplyInputIgnition switch: ON Battery voltage
Ignition switch: OFF 0 V
5
(LG)GroundPower steering solenoid
valve ground—Always 0 V
6
(B)Ground Ground — Always 0 V
8
(L/B)Ground Vehicle speed signal InputVehicle speed: 40 km/h (25 MPH)
CAUTION:
Check air pressure of tire under
standard condition.
10
(V/W)Ground Engine speed signal InputEngine is running
 Warm-up condition
 Idle speed
Engine is running
 Warm-up condition
 Engine speed: Approx. 2,000 rpm
JSNIA0015GB
JSGIA0143ZZ
PBIA3655J

UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
STC-17
< SYMPTOM DIAGNOSIS >
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STC
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SYMPTOM DIAGNOSIS
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)
DescriptionINFOID:0000000003893538
 Hard steering when fully turning the steering wheel.
 Light steering when driving at a high speed.
Diagnosis ProcedureINFOID:0000000003893539
1.CHECK SYSTEM FOR POWER SUPPLY AND GROUND
Perform trouble diagnosis for power supply and ground. Refer to STC-6, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace damaged parts.
2.CHECK SYSTEM FOR VEHICLE SPEED SIGNAL
Perform trouble diagnosis for vehicle speed signal. Refer to STC-11, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK SYSTEM FOR ENGINE SPEED SIGNAL
Perform trouble diagnosis for engine speed signal. Refer to STC-9, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK SYSTEM FOR POWER STEERING SOLENOID VALVE
Perform trouble diagnosis for power steering solenoid valve. Refer to STC-7, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Perform the symptom diagnosis for the steering system. Refer to ST-2, "NVH Troubleshooting
Chart".
NO >> Repair or replace damaged parts.

DIAGNOSIS AND REPAIR WORKFLOW
STR-3
< BASIC INSPECTION >
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NOTE:
If any malfunction is found, immediately disconnect the battery cable from the negative terminal.
1.CHECK ENGINE START
Crank the engine and check that the engine starts.
Does the engine start?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK THAT THE STARTER MOTOR STOPS
Check that the starter motor stops after starting the engine.
Does the starter motor stop?
YES >> INSPECTION END
NO >> Replace magnetic switch.
3.CHECK THE ENGINE SPEED WITH CRANKING
Check that the engine turns at cranking.
Does engine turn by cranking?
YES >> GO TO 4.
NO >> GO TO 5.
4.CHECK THE ENGINE SPEED WITH CRANKING
Check that the engine speed is not low at cranking.
Does engine turn normally?
YES >> Check ignition/fuel system.
NO >> Check charge condition, corrosion and connection condition of the battery. Refer to STR-2, "
Work
Flow".
5.CHECK STARTER MOTOR ACTIVATION
Check that the starter motor turns at cranking.
Does starter motor turn?
YES >> GO TO 6.
NO >> GO TO 7.
6.CHECK STARTER MOTOR UNIT
1. Remove starter motor.
2. Check that the gear shaft of starter motor rotates.
Does gear shaft turn?
YES >> Check pinion clutch. Refer to the following.
• VQ25DE models: STR-16, "
VQ25DE : Inspection"
 VQ35DE models: STR-22, "VQ35DE : Inspection"
NO >> Check reduction gear, armature and gear shaft.
7.CHECK POWER SUPPLY CIRCUIT
Check the following conditions.
 Fuse and fusible link
 Charge condition, corrosion and connection condition of the battery. Refer to STR-2, "
Work Flow".
Are these inspection results normal?
YES >> GO TO 8.
NO >> Repair as needed.
8.CHECK STARTING SYSTEM WIRING
Check the following.
 “B” terminal circuit. Refer to STR-8, "
Diagnosis Procedure".
 “S” terminal circuit. Refer to STR-9, "
Diagnosis Procedure".
Are these inspection results normal?
YES >> GO TO 9.

STR-8
< COMPONENT DIAGNOSIS >
B TERMINAL CIRCUIT
COMPONENT DIAGNOSIS
B TERMINAL CIRCUIT
DescriptionINFOID:0000000003860425
The “B” terminal is constantly supplied with battery power.
Diagnosis ProcedureINFOID:0000000003860426
CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
1.CHECK “B” TERMINAL CIRCUIT
1. Turn ignition switch OFF.
2. Check that starter motor “B” terminal connection is clean and tight.
3. Check voltage between starter motor “B” terminal and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check harness between battery and starter motor for open circuit.
2.CHECK BATTERY CABLE CONNECTION STATUS (VOLTAGE DROP TEST)
1. Shift the selector lever to “P” or “N” position.
2. Check voltage between battery positive terminal and starter motor “B” terminal.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between the battery and the starter motor for poor continuity.
3.CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
1. Shift the selector lever to “P” or “N” position.
2. Check voltage between starter motor case and battery negative terminal.
Is the inspection result normal?
YES >> “B” terminal circuit is OK. Further inspection is necessary. Refer to STR-2, "Work Flow".
NO >> Check the starter motor case and ground for poor continuity.
Te r m i n a l s
Voltage (Approx.) (+)
(–)
Starter motor “B” terminal Terminal
F49 (VQ25DE)
F10 (VQ35DE)2 Ground Battery voltage
Te r m i n a l s
Condition Voltage (Approx.)
(+)(–)
Starter motor
“B” terminalTerminal
Battery positive terminalF49 (VQ25DE)
F10 (VQ35DE)2 When the ignition switch is
in START positionLess than
0.5 V
Te r m i n a l s
Condition Voltage (Approx.)
(+) (–)
Starter motor case Battery negative terminalWhen the ignition switch is in
START positionLess than 0.2 V

S TERMINAL CIRCUIT
STR-9
< COMPONENT DIAGNOSIS >
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STR
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S TERMINAL CIRCUIT
DescriptionINFOID:0000000003860427
The starter motor magnetic switch is supplied with power when the ignition switch is turned to START with the
selector lever “P” or “N”.
Diagnosis ProcedureINFOID:0000000003860428
CAUTION:
Perform diagnosis under the condition that engine cannot start by the following procedure.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
1.CHECK “S” CONNECTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect “S” terminal.
3. Shift the selector lever to “P” or “N” position.
4. Check voltage between starter motor harness connector and ground.
Is the inspection result normal?
YES >> “S” terminal circuit is OK. Further inspection is necessary. Refer to STR-2, "Work Flow".
NO >> GO TO 2.
2.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect IPDM E/R connector.
2. Check continuity between starter motor “S” terminal and IPDM E/R harness connector.
Is the inspection result normal?
YES >> Inspect IPDM E/R and power supply circuit. Refer to STR-2, "Work Flow".
NO >> Repair the harness.
Te r m i n a l s
Condition Voltage (Approx.) (+)
(–)
Starter motor harness
connectorTe r m i n a l
F50 (VQ25DE)
F47 (VQ35DE)1 GroundWhen the ignition switch
is in START positionBattery voltage
Starter motor “S” terminal IPDM E/R harness connector
Continuity
Connector No. Terminal No. Connector No. Terminal No.
F50 (VQ25DE)
F47 (VQ35DE)1E1080Existed

TM-3
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P Component Inspection [Pressure Control Sole-
noid Valve B (Secondary Pressure Solenoid
Valve)] .....................................................................
84
P1701 TRANSMISSION CONTROL MODULE
(POWER SUPPLY) .............................................
85
Description ..............................................................85
DTC Logic ...............................................................85
Diagnosis Procedure ...............................................85
P1705 THROTTLE POSITION SENSOR ...........88
Description ..............................................................88
DTC Logic ...............................................................88
Diagnosis Procedure ...............................................88
P1722 ESTM VEHICLE SPEED SIGNAL ..........89
Description ..............................................................89
DTC Logic ...............................................................89
Diagnosis Procedure ...............................................89
P1723 CVT SPEED SENSOR FUNCTION ........91
Description ..............................................................91
DTC Logic ...............................................................91
Diagnosis Procedure ...............................................91
P1726 ELECTRIC THROTTLE CONTROL
SYSTEM .............................................................
93
Description ..............................................................93
DTC Logic ...............................................................93
Diagnosis Procedure ...............................................93
P1740 LOCK-UP SELECT SOLENOID
VALVE ................................................................
94
Description ..............................................................94
DTC Logic ...............................................................94
Diagnosis Procedure ...............................................94
Component Inspection (Lock-up Select Solenoid
Valve) ......................................................................
95
P1745 LINE PRESSURE CONTROL .................96
Description ..............................................................96
DTC Logic ...............................................................96
Diagnosis Procedure ...............................................96
P1777 STEP MOTOR .........................................97
Description ..............................................................97
DTC Logic ...............................................................97
Diagnosis Procedure ...............................................97
Component Inspection (Step Motor) .......................98
P1778 STEP MOTOR - FUNCTION .................100
Description ............................................................100
DTC Logic .............................................................100
Diagnosis Procedure .............................................100
SHIFT POSITION INDICATOR CIRCUIT .........102
Description ............................................................102
Component Function Check ..................................102
Diagnosis Procedure .............................................102
SHIFT LOCK SYSTEM .....................................103
Description .............................................................103
Wiring Diagram - CVT SHIFT LOCK SYSTEM - ...103
Component Function Check ..................................105
Diagnosis Procedure .............................................106
Component Inspection (Stop Lamp Switch) ..........107
SPORT MODE SWITCH .................................108
Description .............................................................108
Component Function Check ..................................108
Diagnosis Procedure .............................................108
ECU DIAGNOSIS .......................................111
TCM .................................................................111
Reference Value ....................................................111
Wiring Diagram - CVT CONTROL SYSTEM - .......116
Fail-safe .................................................................120
DTC Inspection Priority Chart ................................121
DTC Index .............................................................121
SYMPTOM DIAGNOSIS ............................123
SYSTEM SYMPTOM .......................................123
Symptom Table .....................................................123
PRECAUTION ............................................135
PRECAUTIONS ...............................................135
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...............................................................
135
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .................................
135
Precaution for Procedure without Cowl Top Cover ..136
Precaution for On Board Diagnosis (OBD) System
of CVT and Engine ................................................
136
Precaution for TCM and CVT Assembly Replace-
ment .......................................................................
136
Removal and Installation Procedure for CVT Unit
Connector ..............................................................
136
Precaution .............................................................138
Service Notice or Precaution .................................138
ATFTEMP COUNT Conversion Table ...................139
PREPARATION .........................................140
PREPARATION ...............................................140
Special Service Tools ............................................140
Commercial Service Tools .....................................140
ON-VEHICLE MAINTENANCE ..................142
CVT FLUID ......................................................142
Inspection ..............................................................142
Changing ...............................................................143
STALL TEST ...................................................144
Inspection and Judgment ......................................144
LINE PRESSURE TEST ..................................146
Inspection and Judgment ......................................146

TM-4
ROAD TEST .....................................................148
Description .............................................................148
Check before Engine Is Started .............................148
Check at Idle ..........................................................149
Cruise Test ............................................................150
CVT POSITION ................................................152
Inspection and Adjustment ....................................152
ON-VEHICLE REPAIR ...............................153
TRANSMISSION CONTROL MODULE ..........153
Exploded View .......................................................153
Removal and Installation .......................................153
Adjustment .............................................................154
CONTROL DEVICE .........................................155
Exploded View .......................................................155
Removal and Installation .......................................155
Inspection and Adjustment ....................................156
CONTROL CABLE ..........................................157
Exploded View .......................................................157
Removal and Installation .......................................157
Inspection and Adjustment ....................................158
OIL PAN ...........................................................159
Exploded View .......................................................159
Removal and Installation .......................................159
Inspection ..............................................................160
SECONDARY SPEED SENSOR .....................161
Exploded View .......................................................161
Removal and Installation .......................................161
Inspection ..............................................................161
DIFFERENTIAL SIDE OIL SEAL ....................162
Exploded View .......................................................162
Removal and Installation .......................................162
Inspection ..............................................................163
AIR BREATHER HOSE ...................................164
Exploded View .......................................................164
Removal and Installation .......................................164
FLUID COOLER SYSTEM ...............................165
Exploded View .......................................................165
Removal and Installation .......................................165
Inspection ..............................................................167
REMOVAL AND INSTALLATION ..............168
TRANSAXLE ASSEMBLY ..............................168
Exploded View .......................................................168
Removal and Installation .......................................168
Inspection ..............................................................170
DISASSEMBLY AND ASSEMBLY ............172
TORQUE CONVERTER ..................................172
Exploded View .......................................................172
Disassembly ..........................................................172
Assembly ..............................................................172
Inspection ..............................................................173
SERVICE DATA AND SPECIFICATIONS
(SDS) .........................................................
174
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
174
General Specification ............................................174
Vehicle Speed When Shifting Gears .....................174
Stall Speed ............................................................174
Line Pressure ........................................................174
Solenoid Valves ....................................................175
CVT Fluid Temperature Sensor ............................175
Primary Speed Sensor ..........................................175
Secondary Speed Sensor .....................................175
Step Motor ............................................................175
Torque Converter ..................................................175
CVT: RE0F10A
BASIC INSPECTION .................................
176
DIAGNOSIS AND REPAIR WORK FLOW .......176
Work Flow .............................................................176
Diagnostic Work Sheet .........................................177
INSPECTION AND ADJUSTMENT ..................179
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ......................................................
179
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Service After Replacing TCM
and Transaxle Assembly .......................................
179
FUNCTION DIAGNOSIS ...........................181
CVT SYSTEM ...................................................181
System Diagram ...................................................181
Component Parts Location ...................................182
MECHANICAL SYSTEM ..................................183
Cross-Sectional View ............................................183
System Diagram ...................................................184
System Description ...............................................184
Component Parts Location ...................................185
Component Description ........................................186
HYDRAULIC CONTROL SYSTEM ..................187
System Diagram ...................................................187
System Description ...............................................187
Component Parts Location ...................................188
Component Description ........................................189
CONTROL SYSTEM .........................................190
System Diagram ...................................................190
System Description ...............................................190
Component Parts Location ...................................192
Component Description ........................................193
LOCK-UP AND SELECT CONTROL SYSTEM
..
194