2003 NISSAN TEANA Torque

SYSTEM DESCRIPTION
BRC-41
[VDC/TCS/ABS]
C
D
E
G
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K
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MA
B
BRC

SYSTEM DESCRIPTIONPFP:00000
System DiagramBFS000DP
FunctionsBFS000DQ
VDC

In addition to the TCS/ABS function, the steering amount and brake operation amount are detected from
the steering angle sensor and brake switch, and the driving condition (amount of under-steering/over-
steering) is determined from information from the yaw rate/side/decel G sensor, vehicle speed sensor, etc.
This information is used to improve vehicle stability by controlling the braking and engine power to all four
wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard.
This is normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while
engine is running. In this case, restart engine on a normal road, and if ABS warning lamp, VDC OFF indi-
cator lamp, and SLIP indicator lamp turn off, there is no malfunction.
TCS

Speed signals for 4 wheels control engine output and transaxle conditions so that slip rate of the drive
wheels is optimum. ABS actuator and electric unit (control unit) detects wheelspin. Output from the control
unit controls brake fluid pressure to both LH and RH drive wheels while cutting fuel to the engine and clos-
ing the throttle valve to reduce engine torque when wheelspin is detected. Throttle position is continuously
controlled to ensure the appropriate engine torque at all times.

Depending on road conditions, the driver may have a sluggish feel. This is normal, because the optimum
traction has the highest priority by TCS operation.

TCS may be activated momentarily the vehicle suddenly accelerates, suddenly downshifts, or is driven on
a road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
SFIA3329E

BRC-66
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS

Basic InspectionBFS000E7
BRAKE FLUID LEVEL, LEAKAGE AND BRAKE PAD
1. Check fluid level in the brake fluid reservoir tank. Refill the brake fluid if fluid level is low.
2. Check the area around the brake piping and actuator for leakage. If leakage or oozing is detected, check
as follows:

If ABS actuator and electric unit (control unit) connections are loose, tighten connections to the speci-
fied torque. Check again for leakage, and make sure that there is no fluid leakage.

If the flare nuts at the connections and the threads of the actuator are damaged, replace the damaged
parts. Then check again for leakage, and make sure that there is no fluid leak.

If leakage or oozing is detected on parts other than actuator connections, wipe with a clean cloth and
check again. If there is still leakage or oozing, replace the damaged part.

If leakage or oozing is detected on actuator body, wipe with a clean cloth and check again. If there is
still leakage or oozing, replace ABS actuator and electric unit (control unit).
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3. Check brake pad for wear. Refer to BR-26, "
PAD WEAR INSPECTION" , “FRONT DISC BRAKE”, BR-33,
"PAD WEAR INSPECTION" , “REAR DISC BRAKE”.
POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY
Check battery for looseness on the battery positive/negative terminal and ground connection. Also make sure
that battery voltage does not drop.
INSPECTION OF ABS WARNING LAMP, BRAKE WARNING LAMP, VDC OFF INDICATOR LAMP,
AND SLIP INDICATOR LAMP
×: ON –: OFF
Note 1: Turns off after engine start
Note 2: The brake warning lamp turns on during parking brake operation (when switch is on) and brake fluid level sensor operation
(insufficient brake fluid).
1. Make sure that when the ignition switch is turned ON, the ABS warning lamp, VDC OFF indicator lamp
(when VDC OFF switch is off), and SLIP indicator lamp turn on for approximately 1 second, and that the
brake warning lamp turns on. If they do not turn on, perform CAN communication system diagnosis. Refer
to BRC-81, "
CAN Communication System" . Be sure to check VDC OFF switch before checking VDC OFF
indicator lamp. Refer to BRC-81, "
VDC OFF SWITCH" . Check combination meter if there is no malfunc-
tion in CAN communication system and VDC OFF switch. Refer to DI-4, "
COMBINATION METERS" .
2. Check if the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off approximately
1 second after the ignition switch is turned ON, and if the brake warning lamp turns off after the engine is
started. If they do not turn off, perform self-diagnosis.
ConditionABS warning
lampBrake warning
lamp (Note 2)VDC OFF indica-
tor lampSLIP indicator
lampRemarks
Ignition switch OFF ———— —
For a while after ignition
switch is turned ON×× (Note 1)××—
In a while after ignition
switch is turned ON
(System normal)—× (Note 1) — —Turns OFF 2 seconds
after ignition switch is
turned ON.
When the VDC OFF
switch is turned ON.
(VDC function OFF)——×——
VDC/TCS/ABS error×—××When there is an
ABS actuator and
electric unit (control
unit) error (power
ground or system
malfunction).
When VDC/TCS is not func-
tioning normally.——××—
EBD error××××—

BRC-86
[VDC/TCS/ABS]
WHEEL SENSORS

WHEEL SENSORSPFP:47910
Removal and InstallationBFS000EQ
COMPONENTS
REMOVAL
Be careful of the following.
CAUTION:
When removing the wheel sensor, do not rotate it if possible, and do not forcibly pull the wheel sensor
harness.
INSTALLATION
Note the following, and tighten bolts to the specified torque.

Check the inside of the wheel sensor mounting hole for foreign materials, the rotor surface for iron chips
and other foreign materials. Clean both the wheel sensor mounting hole and the rotor surface before
installation. Replace the wheel sensor if there is any non-standard condition.

Completely push in rubber clamp of strut bracket and body bracket until they lock when installing front
wheel sensor so that the wheel sensor harness will not be twisted. Install grommet groove onto bracket
with yellow line on the harness facing bracket opening (mounting hole). There should be no twists in the
harness when installed.

When installing the rear sensor, securely install the harness mount of the rear suspension member so that
the wheel sensor harness is not twisted. In addition, there should be no twists in the harness when
installed.
SFIA2091E

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-89
[VDC/TCS/ABS]
C
D
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G
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MA
B
BRC

REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit).
3. Remove ABS actuator and electric unit (control unit) mounting nuts.
4. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following when removing ABS actuator and electric unit (control unit).

If the part number on the part number label (pasted on actuator upper surface) is the same, ABS
actuator and electric unit (control unit) cannot be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, SLIP indicator lamp and VDC OFF indicator
lamp may turn ON or VDC/TCS/ABS may not operate normally.
When replacing ABS actuator and electric unit (control unit), must use new service parts.

Before servicing, disconnect battery cables.

To remove brake tube, use a flare nut torque wrench to prevent flare nuts and brake tube from
being damaged. To install, use a flare nut torque wrench (commercial service tool) and tighten
with the specified torque.

Do not apply excessive impact to actuator, such as dropping it.

Do not remove and install ABS actuator and electric unit (control unit) by holding harness.
INSTALLATION
Install is in the reverse order of the removal.
CAUTION:
Be careful of the following when installing ABS actuator and electric unit (control unit).

Tighten the mounting bolts and nuts with the specified torque.

After the work, bleed air from brake piping. Refer to BR-10, "Bleeding Brake System" .

After installing body harness connector in the actuator, make sure connector is securely locked

When replacing ABS actuator and electric unit (control unit), calibrate Steering angle sensor neu-
tral position. Refer to BRC-40, "
Adjustment of Steering Angle Sensor Neutral Position" .

CVT-1
CVT
C TRANSMISSION/TRANSAXLE
CONTENTS
D
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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-2 TCM INSPECTION TABLE .................................. 40
CONSULT-II Function (TRANSMISSION) .............. 43
FUNCTION .......................................................... 43
CONSULT-II REFERENCE VALUE ..................... 43
CONSULT-II SETTING PROCEDURE ................ 45
WORK SUPPORT MODE ................................... 45
SELF-DIAGNOSTIC RESULT MODE ................. 47
DATA MONITOR MODE ...................................... 50
CAN DIAGNOSTIC SUPPORT MONITOR
MODE .................................................................. 52
DTC U1000 CAN COMMUNICATION LINE .............. 53
Description .............................................................. 53
On Board Diagnosis Logic ...................................... 53
Possible Cause ....................................................... 53
DTC Confirmation Procedure ................................. 53
WITH CONSULT-II .............................................. 53
Wiring Diagram — CVT — CAN ............................. 54
Diagnostic Procedure ............................................. 55
DTC P0615 START SIGNAL CIRCUIT ..................... 56
Description .............................................................. 56
CONSULT-II Reference Value ................................ 56
On Board Diagnosis Logic ...................................... 56
Possible Cause ....................................................... 56
DTC Confirmation Procedure ................................. 56
WITH CONSULT-II .............................................. 56
Wiring Diagram — CVT — STSIG .......................... 57
Diagnostic Procedure ............................................. 58
DTC P0703 STOP LAMP SWITCH CIRCUIT ........... 60
Description .............................................................. 60
CONSULT-II Reference Value ................................ 60
On Board Diagnosis Logic ...................................... 60
Possible Cause ....................................................... 60
DTC Confirmation Procedure ................................. 60
WITH CONSULT-II .............................................. 60
Diagnostic Procedure ............................................. 61
DTC P0705 PARK/NEUTRAL POSITION SWITCH ... 62
Description .............................................................. 62
CONSULT-II Reference Value ................................ 62
On Board Diagnosis Logic ...................................... 62
Possible Cause ....................................................... 62
DTC Confirmation Procedure ................................. 62
WITH CONSULT-II .............................................. 63
Wiring Diagram — CVT — PNP/SW ...................... 64
Diagnostic Procedure ............................................. 66
Component Inspection ............................................ 68
PNP SWITCH ...................................................... 68
DTC P0710 CVT FLUID TEMPERATURE SENSOR
CIRCUIT .................................................................... 69
Description .............................................................. 69
CONSULT-II Reference Value ................................ 69
On Board Diagnosis Logic ...................................... 69
Possible Cause ....................................................... 69
DTC Confirmation Procedure ................................. 69
WITH CONSULT-II .............................................. 69
Wiring Diagram — CVT — FTS .............................. 70
Diagnostic Procedure ............................................. 71
Component Inspection ............................................ 73
CVT FLUID TEMPERATURE SENSOR .............. 73
DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR) ..................................................... 74
Description .............................................................. 74
CONSULT-II Reference Value ................................. 74
On Board Diagnosis Logic ...................................... 74
Possible Cause ....................................................... 74
DTC Confirmation Procedure .................................. 74
WITH CONSULT-II ............................................... 74
Wiring Diagram — CVT — PRSCVT ...................... 75
Diagnostic Procedure .............................................. 76
DTC P0720 VEHICLE SPEED SENSOR CVT (SEC-
ONDARY SPEED SENSOR) ..................................... 79
Description .............................................................. 79
CONSULT-II Reference Value ................................. 79
On Board Diagnosis Logic ...................................... 79
Possible Cause ....................................................... 79
DTC Confirmation Procedure .................................. 79
WITH CONSULT-II ............................................... 79
Wiring Diagram — CVT — SESCVT ...................... 80
Diagnostic Procedure .............................................. 81
DTC P0725 ENGINE SPEED SIGNAL ...................... 85
Description .............................................................. 85
CONSULT-II Reference Value ................................. 85
On Board Diagnosis Logic ...................................... 85
Possible Cause ....................................................... 85
DTC Confirmation Procedure .................................. 85
WITH CONSULT-II ............................................... 85
Diagnostic Procedure .............................................. 85
DTC P0730 BELT DAMAGE ..................................... 87
Description .............................................................. 87
CONSULT-II Reference Value ................................. 87
On Board Diagnosis Logic ...................................... 87
Possible Cause ....................................................... 87
DTC Confirmation Procedure .................................. 87
WITH CONSULT-II ............................................... 87
Diagnostic Procedure .............................................. 88
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................... 89
Description .............................................................. 89
CONSULT-II Reference Value ................................. 89
On Board Diagnosis Logic ...................................... 89
Possible Cause ....................................................... 89
DTC Confirmation Procedure .................................. 89
WITH CONSULT-II ............................................... 89
Wiring Diagram — CVT — TCV .............................. 90
Diagnostic Procedure .............................................. 91
Component Inspection ............................................ 93
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .................................................................. 93
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) ... 94
Description .............................................................. 94
CONSULT-II Reference Value ................................. 94
On Board Diagnosis Logic ...................................... 94
Possible Cause ....................................................... 94
DTC Confirmation Procedure .................................. 94
WITH CONSULT-II ............................................... 94
Diagnostic Procedure .............................................. 95
DTC P0745 LINE PRESSURE SOLENOID VALVE ... 97
Description .............................................................. 97
CONSULT-II Reference Value ................................. 97

CVT SYSTEM
CVT-15
D
E
F
G
H
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K
L
MA
B
CVT

CVT SYSTEMPFP:31036
Cross-Sectional View - RE0F09ABCS001FZ
1. Converter housing 2. Oil pump 3. Forward clutch
4. Reverse brake 5. Planetary carrier 6. Primary pulley
7. Steel belt 8. Sun gear 9. Side cover
10. Internal gear 11. Secondary pulley 12. Final gear
13. Differential case 14. Idler gear 15. Reduction gear
16. Taper roller bearing 17. Output gear 18. Parking gear
19. Input shaft 20. Torque converter
SCIA7859E

CVT-18
CVT SYSTEM

TCM FunctionBCS001G2
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.
CONTROL SYSTEM DIAGRAM
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
Manual mode 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-II communication line
Duet-EA control
CAN systemSte p mo tor
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid
valve
Manual mode indicator
Shift position indicator
CVT indicator lamp
Starter relay
SCIA7872E