2011 NISSAN LATIO wheel torque

A/T CONTROL SYSTEMAT-35
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Lock-up 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 drain-
ing the torque converter clutch piston applying pressure and the torque converter clutch piston release pres-
sure is generated.
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 generating
the torque converter clutch piston applying pressure and t he torque converter clutch piston release pressure is
drained.
In this way, the torque converter clutch piston is pressed and coupled.
SMOOTH LOCK-UP CONTROL
When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the
torque converter clutch is temporarily set to the half-clutched state to reduce the shock.
Half-clutched State
The current output from the TCM to the torque converte r clutch solenoid is varied to steadily increase the
torque converter clutch solenoid pressure.
In this way, the lock-up applying pressure gradually rises and while the torque converter clutch piston is put
into half-clutched status, the torque converter clutch piston applying pressure is increased and the coupling is
completed smoothly.
Engine Brake Control (Overrun Clutch Control)INFOID:0000000005928081
Forward one-way clutch is used to reduce shifting shoc ks in downshifting operations. This clutch transmits
engine torque to the wheels. However, drive force fr om the wheels is not transmitted to the engine because
the one-way clutch rotates idle. This means the engine brake is not effective.
The overrun clutch operates when the engine brake is needed.
SCIA5623E
Revision: May 2010 2011 Versa

BODY REPAIRBL-307
< SERVICE INFORMATION >
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• The spot weld on HSS panels is harder than that of an ordi- nary steel panel.
Therefore, when cutting spot welds on a HSS panel, use a low
speed high torque drill (1,000 to 1,200 rpm) to increase drill bit
durability and facilitate the operation.
2. Precautions in spot welding HSS This work should be performed under standard working condi-
tions. Always note the following when spot welding HSS:
• The electrode tip diameter must be sized properly according tothe metal thickness.
• The panel surfaces must fit flush to each other, leaving no gaps.
• Follow the specifications for the proper welding pitch.
Unit: mm
Rear fender hemming process
1. A wheel arch is to be installed and hemmed over left and right outer wheel house.
2. In order to hem the wheel arch, it is necessary to repair any damaged or defaced parts around outer wheel house.
CAUTION:
Ensure that the area that is to be glued around outer wheelhouse is undamaged or defaced.
Procedure of the hemming process
PIIA0145E
PIIA0146E
PIIA0147E
Thickness (t) Minimum pitch ( )
0.6 (0.024)
0.8 (0.031)
1.0 (0.039)
1.2 (0.047)
1.6 (0.063)
1.8 (0.071) 10 (0.39) or over
12 (0.47) or over
18 (0.71) or over
20 (0.79) or over
27 (1.06) or over
31 (1.22) or over
PIIA0148E
Revision: May 2010
2011 Versa

PRECAUTIONSBR-3
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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 al l control units using CONSULT-III.
Precaution for Brake SystemINFOID:0000000005928387
• Refill using recommended brake fluid. Refer to MA-14.
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted surface of body. If brake fluid is splashed on painted surfaces of body immediately wipe it off with cloth and then wash it away with water.
• To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use new brake fluid.
• Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
• Use a flare nut wrench when removing a brake tube and use a flare nut torque wrench when installing a brake tube.
• When installing brake tubes and hoses, be sure to check torque.
• Before working, turn igniti on switch OFF and disconnect connec-
tors of ABS actuator and electric unit (control unit) or the battery
cable from the negative terminal.
• Burnish the new braking surfaces after refinishing or replacing drums or rotors, after replacing p ads or linings, or if a soft pedal
occurs at very low mileage. Refer to BR-34, "
Brake Burnishing
Procedure" .
SBR686C
Revision: May 2010 2011 Versa

BR-26
< SERVICE INFORMATION >
FRONT DISC BRAKE
CLZ25VF
CAUTION:
• Clean dust on caliper and brake pad with a vacuum dust collector. Do not blow with compressed air.
• While removing brake pad or cylinder body, do not depress brake pedal because piston will pop out.
• It is not necessary to remove torque member mounting bolts and brake hose except for disassembly
or replacement of caliper assembly. In this case, hang cylinder body with a wire so that brake hose is
not under tension.
• Do not damage piston boot.
• If any shim is subject to serious corrosion, replace it with a new one.
• Keep rotor free from brake fluid.
• When replacing brake pad, replace shim with a new one.
Removal and Installation of Brake PadINFOID:0000000005928412
AD22VK
Removal
1. Partially drain brake fluid reservoir. Refer to BR-9, "Drain and Refill".
2. Remove front wheel and tire using power tools.
AWFIA0641GB
1. Union bolt 2. Brake hose3. Copper washer
4. Cap 5. Bleed valve6. Sliding pin bolt
7. Cylinder body 8. Piston seal9. Piston
10. Piston boot 11. Inner shim cover12. Inner shim
13. Inner pad 14. Pad wear sensor15. Pad retainer
16. Outer pad 17. Outer shim18. Outer shim cover
19. Sliding pin 20. Sliding pin boot21. Bushing
22. Torque member bolt 23. Torque member Front
: Brake fluid 1:Molykote AS-880N grease 2: Rubber grease
3: Molykote 7439 grease
Revision: May 2010 2011 Versa

BR-28
< SERVICE INFORMATION >
FRONT DISC BRAKE
• When installing pad retainer, attach it firmly so that it isnot lifted up from torque member, as shown.
4. Install cylinder body to torque member and apply rubber grease, then install lower sliding pin bolt (lower side) and tighten it to the
specified torque. Refer to BR-25, "
Component".
CAUTION:
Check the brake fluid level in the reservoir tank for fluid
level because brake fluid returns to master cylinder reser-
voir tank when pressing piston in.
NOTE:
Use a disc brake piston tool (commercial service tool) to easily
press to piston in.
5. Check brakes for drag.
6. Install front wheel and tire. Refer to WT-7, "
Adjustment".
7. Check brake fluid level. Refer to BR-9, "
On Board Inspection".
CLZ25VF
Removal
1. Partially drain brake fluid from reservoir. refer to BR-9, "Drain and Refill".
2. Remove the front wheel and tire using power tool.
3. Remove sliding pin bolt (lower side).
4. Hang cylinder body with a wire, and remove pads, shims and pad retainers from torque member.
CAUTION:
PFIA0273E
SBR976B
SBR976B
SBR932C
Revision: May 2010 2011 Versa

FRONT DISC BRAKEBR-29
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When removing pad retainer from torque member, lift pad
retainer in the direction shown by arrow, so as not to
deform it.
Installation
1. Apply Molykote AS-880N grease to the shims. Install shims to pads. CAUTION:
Securely install shims according to mounting direction of pads.
2. Apply Molykote 7439 grease as shown (A).
3. Install pad retainers and pads to the torque member. CAUTION:
When installing pad retainer, att ach it firmly so that it is not
lifted up from torque member, as shown.
4. Install cylinder body over the pads and shims on to torque mem- ber and apply rubber grease, then install lower sliding pin bolt
(lower side) and tighten it to the specified torque. Refer to BR-
25, "Component".
CAUTION:
Check the brake fluid level in th e reservoir tank for fluid
level because brake fluid returns to master cylinder reser-
voir tank when pressing piston in.
NOTE:
Use a disc brake piston tool (commercial service tool) to easily
press to piston in.
5. Check brake for drag.
6. Install the front wheel and tire. Refer to WT-7, "
Adjustment".
7. Check brake fluid level. Refer to BR-9, "
On Board Inspection".
SBR556E
AWFIA0039ZZ
PFIA0273E
SBR976B
Revision: May 2010 2011 Versa

BR-30
< SERVICE INFORMATION >
FRONT DISC BRAKE
Removal and Installation of Brake Caliper Assembly
INFOID:0000000005928413
REMOVAL
1. Remove front wheel and tire.
2. Secure the disc rotor using wheel nuts.
CAUTION:
Put matching marks on wheel hub assembly and disc rotor,
if it is necessary to remove the disc rotor.
3. Drain brake fluid. Refer to BR-9, "
Drain and Refill".
4. Remove the union bolt (A) and discard the copper washers. Remove the brake hose from the cylinder body.
• Protrusions (B)
CAUTION:
Do not reuse the copper washers
5. Remove the torque member bolts and remove the cylinder body and torque member as an assembly.
INSTALLATION
1. Install the torque member and cylinder body as an assemblyand tighten the torque member bolts to the specified torque.
Refer to BR-25, "
Component".
CAUTION:
Before installing torque member to vehicle, wipe oil and
grease on mounting surface of steering knuckle and torque
member.
SDIA2608E
AWFIA0502ZZ
SFIA2437E
SFIA2437E
Revision: May 2010 2011 Versa

FRONT DISC BRAKEBR-31
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2. Install the brake hose to caliper assembly with new copper washers. Align the brake hose tab between the protrusions (B)
on the cylinder body as shown. Tighten the union bolt (A) to the
specified torque. Refer to BR-11, "
Hydraulic Circuit".
CAUTION:
Do not reuse the copper washers
3. Refill with new brake fluid and bleed air. Refer to BR-9, "
Bleeding Brake System".
4. Check front disc brake for drag.
5. Install front wheel and tire. Refer to WT-7, "
Adjustment".
Disassembly and Assembly of Brake Caliper AssemblyINFOID:0000000005928414
DISASSEMBLY
1. Remove the caliper assembly. Refer to BR-30, "Removal and Installation of Brake Caliper Assembly".
2. Remove sliding pin bolts and remove cylinder body from the torque member. Remove pads, shims, pad return spring
(AD22VK) and pad retainers from torque member as necessary.
CAUTION:
When removing pad retainer from torque member, lift the
pad retainer in the direction shown by arrow, so as not to
deform it.
3. Remove sliding pins and sliding pin boots from torque member.
4. Place a wooden block as shown, and blow air from union bolt mounting hole to remove piston and piston boot.
CAUTION:
Do not get fingers caught in the piston.
AWFIA0502ZZ
SFIA1137E
SBR556E
WFIA0525E
Revision: May 2010 2011 Versa