2003 NISSAN TEANA steering wheel

TROUBLE DIAGNOSIS
BRC-65
[VDC/TCS/ABS]
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For Fast and Accurate DiagnosisBFS000E6
PRECAUTIONS FOR DIAGNOSIS

Be sure to check the procedures of “How to Perform Trouble Diagnosis” in advance. Refer to GI-4, "Gen-
eral Precautions" .

Always adjust the neutral position of steering angle sensor before driving when removing and installing
ABS actuator and electric unit (control unit), steering angle sensor, suspension parts and adjusting align-
ment. Refer to BRC-40, "
Adjustment of Steering Angle Sensor Neutral Position" .

Always erase memory after completing trouble diagnosis. Refer to BRC-58, "ERASE MEMORY" .

When inspection of the continuity or voltage between modules or units is performed, check connector ter-
minals for disconnection, looseness, bend, or collapse. Repair or replace applicable part if any non-stan-
dard condition is detected.

Intermittent malfunctions may be caused by a poor connection in the harness, connectors, and terminals.
Move harnesses, harness connectors, and terminals by hand to make sure all connections are solid and
undamaged.

Do not to forcibly extend any connector terminal if a circuit tester is used for the check.

The symptom shown in the table may occur, but the system is operating normally.
Symptom Symptom description Result
Motor operation soundThis is the operation sound of the motor in the actuator and electric unit.Slight
sound may occur during VDC, TCS and ABS operation.
Normal
Just after the engine starts, the motor operating noise may be heard. This is a
normal status of the system operation check.
System operation check soundWhen engine starts, “click” sound may be heard from engine room. This is nor-
mal status of system operation check.Normal
VDC/TCS operation
(SLIP indicator lamp ON)TCS may activate momentarily if wheel speed changes when driving over
location where friction coefficient varies, when downshifting, or when fully
depressing accelerator pedal.
Normal
Cancel the VDC/
TCS function for
the inspection on
a chassis dyna-
mometer. Before the speed meter inspection, push VDC OFF switch to cancel the VDC/
TCS function.
When accelerator pedal is depressed on a chassis dynamometer (front wheel
fixing type), the vehicle speed will not increase. This is normal. It is result of
TCS being activated by stationary front wheels. The warning lamp may also
turn on to show “sensor system malfunction” in this case. This is also normal,
and is the result of the stationary front wheels being detected. Restart engine,
and drive the vehicle at 30 km/h (19 MPH) or more to make sure that the warn-
ing lamp no longer turns on.
ABS operation
(Longer stopping distance)When driving on roads with a low coefficient of friction, such as snowy roads or
gravel roads, the stopping distance is sometimes longer for vehicles equipped
with ABS. Therefore, when driving on such roads, drive at a sufficiently
reduced speed to be safe.Normal
Sluggish feelDepending on road conditions, the driver may have a sluggish feel. This is
because traction control, which controls engine and brakes to achieve optimal
traction, has the highest priority (for safety). As a result sometimes the driver
has a less slight sluggish feel in response than usual acceleration feel.Normal

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-69
[VDC/TCS/ABS]
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5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector E10 (FR-RH), E38 (FR-LH), C2 (RR-RH), C3
(RR-LH) and ABS actuator and electric unit (control unit) con-
nector E241.
2. Check continuity between terminals. (Also check continuity
when the steering wheel is turned right and left and when the
sensor harness inside the wheel house is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness and connector that have malfunction.
6. CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
1. Disconnect malfunctioning wheel sensor connector.
2. Turn ignition switch ON and check voltage between wheel sen-
sor harness connector power supply terminal and ground.
OK or NG
OK >> Replace wheel sensor.
NG >> Replace ABS actuator and electric unit (control unit).
SFIA2098E
Power supply circuit Signal circuit Ground circuit
WheelABS actuator
and electric unit
(control unit)Wheel sensorABS actuator
and electric unit
(control unit)Wheel sensorABS actuator
and electric unit
(control unit)
(Signal)ABS actuator
and electric unit
(control unit)
(Ground)
Front RH 26 1 27 2 26, 27
31, 46 Front LH 14 1 13 2 14, 13
Rear RH 12 1 11 2 11, 12
Rear LH 28 1 29 2 28, 29
Power supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.
Wheel Wheel sensor Ground Voltage
Front RH
1—8 V or more Front LH
Rear RH
Rear LH
SFIA3339E

BRC-72
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM

4. CHECK DATA MONITOR
1. Connect ABS actuator and electric unit (control unit) connector and steering angle sensor.
2. Perform “ST ANGLE SIG” at “DATA MONITOR” to check if the status is normal.
OK or NG
OK >> Perform self-diagnosis again.
NG >> Replace steering angle sensor, and then adjust neutral position of steering angle sensor. Refer to
BRC-40, "
Adjustment of Steering Angle Sensor Neutral Position" .
Yaw Rate/Side/Decel G Sensor SystemBFS000EC
CAUTION:
When the vehicle turns sharply, such as a spin turn, accel turn, or drift driving, while the VDC function
is OFF (VDC OFF indicator lamp turns on), a malfunction may occur in the yaw rate/side/decel G sen-
sor system, so in this case, restart the engine, and if it recovers normally, there is no malfunction.
Always erase memory after that. Refer to BRC-58, "
ERASE MEMORY" .
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect ABS actuator and electric unit (control unit) connector and yaw rate/
side/decel G sensor connector, and check the terminal for deformation, disconnection, looseness, and so
on. Repair or replace the malfunctioning part if there are.
2. Securely reconnect connectors and perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact was loose, damaged, open or shorted.
NG >> GO TO 3.
Steering condition DATA MONITOR
Straight-ahead position−5° to +5°
Turn wheel to the right by 90°. Approx. +90°
Turn wheel to the left by 90°. Approx. −90°
Self-diagnostic results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR

CVT-1
CVT
C TRANSMISSION/TRANSAXLE
CONTENTS
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SECTION CVT
A
B
CVT

CVT
INDEX FOR DTC ........................................................ 6
Alphabetical Index .................................................... 6
DTC No. Index ......................................................... 7
PRECAUTIONS .......................................................... 8
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 8
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect .......................................... 8
OPERATION PROCEDURE ................................. 8
Precautions for TCM and CVT Assembly Replace-
ment ......................................................................... 9
EEPROM ERASING PATTERNS .......................... 9
METHOD FOR ERASING THE EEPROM IN THE
TCM ...................................................................... 9
METHOD FOR WRITING DATA FROM THE
ROM ASSEMBLY IN THE TRANSAXLE .............. 9
CHECK METHOD ................................................. 9
Removal and Installation Procedure for CVT Unit
Connector ............................................................... 10
REMOVAL ........................................................... 10
INSTALLATION ................................................... 10
Precautions ............................................................. 11
PREPARATION ......................................................... 12
Special Service Tools ............................................. 12
Commercial Service Tools ...................................... 12
CVT FLUID ............................................................... 13
Checking CVT Fluid ............................................... 13
Changing CVT Fluid ............................................... 14
CVT SYSTEM ........................................................... 15
Cross-Sectional View - RE0F09A .......................... 15
Control System ....................................................... 16
Hydraulic Control System ....................................... 17
TCM Function ......................................................... 18
CONTROL SYSTEM OUTLINE .......................... 18
CONTROL SYSTEM DIAGRAM ......................... 18
CAN Communication .............................................. 19
SYSTEM DESCRIPTION .................................... 19
Input/Output Signal of TCM .................................... 19Line Pressure and Secondary Pressure Control .... 20
NORMAL CONTROL .......................................... 20
FEEDBACK CONTROL ...................................... 20
Shift Control ............................................................ 20
“D” POSITION ..................................................... 21
“M” POSITION ..................................................... 21
DOWNHILL ENGINE BRAKE CONTROL (AUTO
ENGINE BRAKE CONTROL) .............................. 21
ACCELERATION CONTROL .............................. 21
Lock-up and Select Control .................................... 21
TORQUE CONVERTER CLUTCH AND SELECT
CONTROL VALVE CONTROL ............................ 22
Control Valve .......................................................... 23
FUNCTION OF CONTROL VALVE ..................... 23
TROUBLE DIAGNOSIS ............................................ 24
DTC Inspection Priority Chart ................................. 24
Fail-safe .................................................................. 24
FAIL-SAFE FUNCTION ....................................... 24
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 25
INTRODUCTION ................................................. 25
WORK FLOW ...................................................... 26
DIAGNOSTIC WORKSHEET .............................. 27
CVT Electrical Parts Location ................................. 30
Circuit Diagram ....................................................... 31
Inspections Before Trouble Diagnosis .................... 32
CVT FLUID CHECK ............................................ 32
STALL TEST ........................................................ 32
LINE PRESSURE TEST ..................................... 33
Road Test ............................................................... 35
DESCRIPTION .................................................... 35
CONSULT-II OPERATION PROCEDURE ........... 35
Check Before Engine Is Started ............................. 37
Check at Idle ........................................................... 37
Cruise Test .............................................................. 38
Vehicle Speed at Which Gear Shifting Occurs ....... 40
TCM Input/Output Signal Reference Values ........... 40
TCM TERMINAL CONNECTOR LAYOUT .......... 40

CVT-8
PRECAUTIONS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
BCS001NA
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
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 per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal 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
harness connectors.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectBCS001NB
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-II 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-II.

ENGINE CONTROL SYSTEM
EC-21
[QR]
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Multiport Fuel Injection (MFI) SystemBBS005BF
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.


During warm-up

When starting the engine

During acceleration

Hot-engine operation

When selector lever is changed from N to D

High-load, high-speed operation


During deceleration

During high engine speed operation
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
3
Piston position
Fuel injection & mixture
ratio controlFuel injector Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Knock sensor Engine knocking condition
Battery
Battery voltage*
3
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
Wheel sensor
Vehicle speed*
2
Air conditioner switch
Air conditioner operation*2

AIR CONDITIONING CUT CONTROL
EC-25
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AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartBBS005BI
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signal of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned OFF.

When the accelerator pedal is fully depressed.

When cranking the engine.

At high engine speeds.

When the engine coolant temperature becomes excessively high.

When operating power steering during low engine speed or low vehicle speed.

When engine speed is excessively low.

When refrigerant pressure is excessively low or high.
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor
Vehicle speed*
1
Battery
Battery voltage*2

EC-40
[QR]
BASIC SERVICE PROCEDURE

BASIC SERVICE PROCEDUREPFP:00018
Basic InspectionBBS005BT
1. INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
–Harness connectors for improper connections
–Wiring harness for improper connections, pinches and cut
–Vacuum hoses for splits, kinks and improper connections
–Hoses and ducts for leaks
–Air cleaner clogging
–Gasket
3. Confirm that electrical or mechanical loads are not applied.
–Headlamp switch is OFF.
–Air conditioner switch is OFF.
–Rear window defogger switch is OFF.
–Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no-
load.
6. Make sure that no DTC is displayed with CONSULT-II.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3
SEF983U
SEF976U
SEF977U