torque NISSAN VERSA 2006 Workshop Service Repair Manual

BRC-4
[ABS]
PREPARATION
Revision: June 20062007 Versa
PREPARATIONPFP:00002
Special Service ToolsEFS006M7
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEFS006M8
Tool number
(Kent-Moore No.)
Tool nameDescription
KV991J0080
(J-45741)
ABS active wheel sensor testerChecking operation of ABS active wheel sen-
sors
WFIA0101E
Tool nameDescription
1. Flare nut crowfoot
2. Torque wrenchRemoving and installing brake piping
a: 10 mm (0.39 in)/12 mm (0.47 in)
S-NT360

TROUBLE DIAGNOSIS
BRC-17
[ABS]
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BRC
Revision: June 20062007 Versa
Basic InspectionEFS006LM
BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION
1. Check fluid level in the brake fluid reservoir. If fluid level is low, add fluid.
2. Check the brake piping and around the ABS actuator and electric unit (control unit) for leaks. If there is
leaking or seeping fluid, check the following items.

If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and recheck for leaks.

If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) threads,
replace the damaged part and recheck for leaks.

When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and
recheck for leaks. If fluid is still seeping out, replace the damaged part. If the fluid is leaking at the ABS
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assem-
bly.
CAUTION:
The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced
as an assembly.
3. Check the brake pads for excessive wear.
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.
ABS WARNING LAMP INSPECTION
1. Make sure ABS warning lamp turns on for approximately 2 seconds when the ignition switch is turned ON.
If it does not, check CAN communications. If there are no errors with the CAN communication system,
replace the combination meter. Refer to IP-19, "
COMBINATION METER" .
2. Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis of ABS actuator and electric unit (control unit). If no malfunctions
are detected in self-diagnosis, replace combination meter. Refer to IP-19, "
COMBINATION METER" .
3. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-20, "
CONSULT-II
Function (ABS)" .

WHEEL SENSORS
BRC-33
[ABS]
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BRC
Revision: June 20062007 Versa
WHEEL SENSORSPFP:47910
Removal and InstallationEFS006L4
NOTE:
The top portion of the figure (front side) shows view from LH side of vehicle. RH side is the mirror image.
REMOVAL
Pay attention to the following when removing wheel sensor.
CAUTION:

As much as possible, avoid rotating wheel sensor when removing it. Pull wheel sensors out with-
out pulling on sensor harness.

Take care to avoid damaging wheel sensor edges or rotor teeth. Remove wheel sensor first before
removing front or rear wheel hub. This is to avoid damage to wheel sensor wiring and loss of sen-
sor function.
INSTALLATION
Pay attention to the following when installing wheel sensor. Tighten installation bolts and nuts to the specified
torques.

When installing, make sure there is no foreign material such as iron chips on and in the mounting hole of
the wheel sensor. Make sure no foreign material has been caught in the sensor rotor. Remove any foreign
material and clean the mount.

When installing front wheel sensor, press rubber grommets of strut bracket and body all the way in until
they get locked, and be careful not to apply a twist to harness. Harness should not be twisted after instal-
lation. (Install it with harness paint mark on body side grommet facing front of vehicle, and the strut side
grommet facing outside of vehicle.)
A. Front B. Rear 1. Front wheel sensor connector (LH)
2. Front wheel sensor (LH) 3. Rear wheel sensor (LH) 4. Rear wheel sensor connector (LH)
5. Rear wheel sensor connector (RH) 6. Rear wheel sensor (RH) 7. Side member
8. Left 9. Right : Front
Refer to GI section for symbol marks in the figure.
SFIA3090E

BRC-36
[ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Revision: June 20062007 Versa
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationEFS006L6
CAUTION:

Before servicing, disconnect battery cables.

To remove brake tube, use flare nut wrench to prevent flare nuts and brake tube from being dam-
aged. To install, use flare nut torque wrench, tighten flare nut to the specified torque. Refer to BR-
11, "Hydraulic Circuit" .

Do not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it.

Do not remove and install actuator by holding harness.

After work is completed, bleed air from brake tube and hose. Refer to BR-10, "Bleeding Brake Sys-
tem" .
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 brake booster hose from engine. Refer to BR-22, "
Removal and Installation" .
4. Remove ABS actuator and electric unit (control unit) bracket mounting bolts.
5. Remove ABS actuator and electric unit (control unit) from vehicle.
1. To front right 2. To rear left 3. To rear right
4. To front left 5. From master cylinder primary side 6. From master cylinder secondary
side
7. ABS actuator and electric unit (con-
trol unit)8. Harness connector : Front
Refer to GI section for symbol marks in the figure.
WFIA0506E

CVT-1
CVT
C TRANSMISSION/TRANSAXLE
CONTENTS
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SECTION CVT
A
B
CVT
Revision: June 20062007 Versa 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 On Board Diagnostic (OBD) System
of CVT and Engine ................................................... 9
Service After Replacing TCM and Transaxle
Assembly .................................................................. 9
SERVICE AFTER REPLACING TCM AND
TRANSAXLE ASSEMBLY ..................................... 9
PATTERN A .......................................................... 9
PATTERN B .......................................................... 9
PATTERN C .........................................................11
Removal and Installation Procedure for CVT Unit
Connector ................................................................11
REMOVAL ............................................................11
INSTALLATION ................................................... 12
Precautions ............................................................ 13
Service Notice or Precautions ................................ 13
CVT FLUID COOLER SERVICE ......................... 13
OBD-II SELF-DIAGNOSIS .................................. 14
PREPARATION ......................................................... 15
Special Service Tools ............................................. 15
Commercial Service Tools ...................................... 15
CVT FLUID ............................................................... 16
Checking CVT Fluid ............................................... 16
FLUID LEVEL CHECK ........................................ 16
FLUID CONDITION CHECK ............................... 17
Changing CVT Fluid ............................................... 17
CVT Fluid Cooler Cleaning .................................... 18
CVT FLUID COOLER CLEANING PROCEDURE
... 18
CVT FLUID COOLER DIAGNOSIS PROCE-DURE .................................................................. 19
CVT FLUID COOLER INSPECTION PROCE-
DURE .................................................................. 20
CVT FLUID COOLER FINAL INSPECTION ........ 20
CVT SYSTEM ............................................................ 21
Cross-sectional View - RE0F08A ........................... 21
Control System ....................................................... 22
Hydraulic Control System ....................................... 23
TCM Function ......................................................... 24
CONTROL SYSTEM OUTLINE .......................... 24
CONTROL SYSTEM DIAGRAM ......................... 24
CAN Communication .............................................. 25
SYSTEM DESCRIPTION .................................... 25
Input/Output Signal of TCM .................................... 25
Line Pressure and Secondary Pressure Control .... 26
NORMAL CONTROL .......................................... 26
FEEDBACK CONTROL ...................................... 26
Shift Control ............................................................ 26
“D” POSITION ..................................................... 27
OVERDRIVE-OFF MODE ................................... 27
“L” POSITION ...................................................... 27
DOWNHILL ENGINE BRAKE CONTROL (AUTO
ENGINE BRAKE CONTROL) .............................. 27
ACCELERATION CONTROL .............................. 27
Lock-up and Select Control .................................... 28
TORQUE CONVERTER CLUTCH AND SELECT
CONTROL VALVE CONTROL ............................ 28
Control Valve .......................................................... 29
FUNCTION OF CONTROL VALVE ..................... 29
ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 30
Introduction ............................................................. 30
OBD-II Function for CVT System ........................... 30
One or Two Trip Detection Logic of OBD-II ............ 30
ONE TRIP DETECTION LOGIC ......................... 30
TWO TRIP DETECTION LOGIC ......................... 30
OBD-II Diagnostic Trouble Code (DTC) ................. 30
HOW TO READ DTC AND 1ST TRIP DTC ......... 30
HOW TO ERASE DTC ........................................ 31
HOW TO ERASE DTC (WITH CONSULT-II) ....... 32

CVT-3
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CVT
Revision: June 20062007 Versa WITH CONSULT-II .............................................. 95
WITH GST ........................................................... 95
Wiring Diagram — CVT — SESCVT ...................... 96
Diagnostic Procedure ............................................. 97
DTC P0725 ENGINE SPEED SIGNAL ................... 101
Description ........................................................... 101
CONSULT-II Reference Value .............................. 101
On Board Diagnosis Logic ................................... 101
Possible Cause .................................................... 101
DTC Confirmation Procedure ............................... 101
WITH CONSULT-II ............................................ 101
Diagnostic Procedure ........................................... 101
DTC P0730 BELT DAMAGE .................................. 103
Description ........................................................... 103
CONSULT-II Reference Value .............................. 103
On Board Diagnosis Logic ................................... 103
Possible Cause .................................................... 103
DTC Confirmation Procedure ............................... 103
WITH CONSULT-II ............................................ 103
Diagnostic Procedure ........................................... 104
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE ................................................. 105
Description ........................................................... 105
CONSULT-II Reference Value .............................. 105
On Board Diagnosis Logic ................................... 105
Possible Cause .................................................... 105
DTC Confirmation Procedure ............................... 105
WITH CONSULT-II ............................................ 105
WITH GST ......................................................... 105
Wiring Diagram — CVT — TCV ........................... 106
Diagnostic Procedure ........................................... 107
Component Inspection ......................................... 109
TORQUE CONVERTER CLUTCH SOLENOID
VALVE ............................................................... 109
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .. 110
Description ............................................................ 110
CONSULT-II Reference Value ............................... 110
On Board Diagnosis Logic .................................... 110
Possible Cause ..................................................... 110
DTC Confirmation Procedure ................................ 110
WITH CONSULT-II ............................................. 110
WITH GST .......................................................... 110
Diagnostic Procedure ........................................... . 111
DTC P0745 LINE PRESSURE SOLENOID VALVE .. 113
Description ............................................................ 113
CONSULT-II Reference Value ............................... 113
On Board Diagnosis Logic .................................... 113
Possible Cause ..................................................... 113
DTC Confirmation Procedure ................................ 113
WITH CONSULT-II ............................................. 113
WITH GST .......................................................... 113
Wiring Diagram — CVT — LPSV .......................... 114
Diagnostic Procedure ............................................ 115
Component Inspection .......................................... 117
PRESSURE CONTROL SOLENOID VALVE A
(LINE PRESSURE SOLENOID VALVE) ............ 117
DTC P0746 PRESSURE CONTROL SOLENOID A
PERFORMANCE (LINE PRESSURE SOLENOID
VALVE) ..................................................................... 118Description ............................................................118
CONSULT-II Reference Value ..............................118
On Board Diagnosis Logic ....................................118
Possible Cause .....................................................118
DTC Confirmation Procedure ...............................118
WITH CONSULT-II ............................................118
WITH GST .........................................................118
Diagnostic Procedure ...........................................119
DTC P0776 PRESSURE CONTROL SOLENOID B
PERFORMANCE (SEC PRESSURE SOLENOID
VALVE) ....................................................................121
Description ............................................................121
CONSULT-II Reference Value ..............................121
On Board Diagnosis Logic ....................................121
Possible Cause .....................................................121
DTC Confirmation Procedure ...............................121
WITH CONSULT-II ............................................121
WITH GST .........................................................121
Diagnostic Procedure ...........................................122
DTC P0778 PRESSURE CONTROL SOLENOID B
ELECTRICAL (SEC PRESSURE SOLENOID
VALVE) ....................................................................124
Description ............................................................124
CONSULT-II Reference Value ..............................124
On Board Diagnosis Logic ....................................124
Possible Cause .....................................................124
DTC Confirmation Procedure ...............................124
WITH CONSULT-II ............................................124
WITH GST .........................................................124
Wiring Diagram — CVT — SECPSV ....................125
Diagnostic Procedure ...........................................126
Component Inspection ..........................................128
PRESSURE CONTROL SOLENOID VALVE B
(SECONDARY PRESSURE SOLENOID VALVE)
.128
DTC P0840 TRANSMISSION FLUID PRESSURE
SENSOR A CIRCUIT (SEC PRESSURE SENSOR) .129
Description ............................................................129
CONSULT-II Reference Value ..............................129
On Board Diagnosis Logic ....................................129
Possible Cause .....................................................129
DTC Confirmation Procedure ...............................129
WITH CONSULT-II ............................................129
WITH GST .........................................................129
Wiring Diagram — CVT — SECPS ......................130
Diagnostic Procedure ...........................................131
DTC P0841 PRESSURE SENSOR FUNCTION .....134
Description ............................................................134
CONSULT-II Reference Value ..............................134
On Board Diagnosis Logic ....................................134
Possible Cause .....................................................134
DTC Confirmation Procedure ...............................134
WITH CONSULT-II ............................................134
Diagnostic Procedure ...........................................135
DTC P0845 TRANSMISSION FLUID PRESSURE
SENSOR B CIRCUIT (PRI PRESSURE SENSOR) .137
Description ............................................................137
CONSULT-II Reference Value ..............................137
On Board Diagnosis Logic ....................................137

CVT SYSTEM
CVT-21
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CVT
Revision: June 20062007 Versa
CVT SYSTEMPFP:31036
Cross-sectional View - RE0F08AUCS005XQ
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. Differential case
13. Final gear 14. Idler gear 15. Reduction gear
16. Output gear 17. Parking gear 18. Input shaft
19. Torque converter
SCIA8015E

CVT-24
CVT SYSTEM
Revision: June 20062007 Versa
TCM FunctionUCS005XT
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
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-II communication line
Duet-EA control
CAN system
On board diagnosisStep mo to r
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
SCIA7933E

CVT-26
CVT SYSTEM
Revision: June 20062007 Versa
Line Pressure and Secondary Pressure ControlUCS005XW

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
pressure 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
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 ControlUCS005XX
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.
SCIA1846E
SCIA7958E

CVT-28
CVT SYSTEM
Revision: June 20062007 Versa
Lock-up and Select ControlUCS005XY

The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to
increase power transmission efficiency.

The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid
valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or
releases the torque converter clutch piston.

When shifting between “N” (“P”) ⇔ “D” (“R”), torque converter clutch solenoid controls engagement power
of forward clutch and reverse brake.

The lock-up applied gear range was expanded by locking up the
torque converter at a lower vehicle speed than conventional
CVT models.
TORQUE CONVERTER CLUTCH AND SELECT CONTROL VALVE CONTROL
Lock-up and Select Control System Diagram
Lock-up Released
In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the
torque converter clutch solenoid and the lock-up apply pressure is drained.
In this way, the torque converter clutch piston is not coupled.
Lock-up Applied
In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the torque
converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
Select Control
When shifting between “N” (“P”)⇔“D” (“R”), optimize the operating pressure on the basis of the throttle posi-
tion, the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.
SCIA1958E
SCIA2374E