2009 NISSAN LATIO wheel torque

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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:0000000004305306
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.

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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 to the 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 PIIA0146E
PIIA0147E

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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 System INFOID:0000000004305887
• Refill using recommended brake fluid. Refer to MA-14 .
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted surfac e 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-32, " Brake Burnishing
Procedure " .

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3. Hang cylinder body with a wire, and remove pad return spring,
pads, shims and pad retainers from torque member.
CAUTION:
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 PBC (Poly Butyl Cuprysil) grease or silicone- based grease to the shims. Install shims to pads.
CAUTION:
Securely install shims according to mounting direction of pads.
2. Install pad retainers, pad return spring, shims and pads to the torque member. CAUTION:
• When installing pad retainer, at tach it firmly so that it is
not lifted up from torque member, as shown.
3. Install cylinder body to torque member. CAUTION:
Check the brake fluid level in the reservoir tank for fluid level because brake fluid returns to mas-
ter cylinder reservoir tank when pressing piston in.
NOTE:
Use a disc brake piston tool (commercial se rvice tool) to easily press to piston in.
4. Install lower sliding pin bolt (lower side), and tighten it to the specified torque. Refer to BR-25, " Compo-
nent " .
5. Check brakes for drag.
6. Install front wheel and tire. Refer to WT-7, " Rotation " .
CLZ25VF
Removal 1. Remove the front wheel and tire using power tool.
2. Remove sliding pin bolt (lower side).
3. Hang cylinder body with a wire, and remove pads, shims and pad retainers from torque member.
CAUTION:
When removing pad retainer from torque member, lift pad
retainer in the direction shown by arrow, so as not to
deform it.
Installation SBR556E

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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 assembly and 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.
2. Install the brake hose to caliper assembly with new copper washers. Align the brake hose tab between the protusions (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, " Rotation " .
Disassembly and Assembly of Brake Caliper Assembly INFOID:0000000004305913
DISASSEMBLY 1. Remove the caliper assembly. Refer to BR-28, " Removal and Installation of Brake Caliper Assembly " .AWFIA0502ZZ
SFIA1137E

BR-30< SERVICE INFORMATION >
FRONT DISC BRAKE
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 fr om 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.
5. Remove piston seal with a flat-bladed screwdriver. CAUTION:
Be careful not to damage the inner wall of cylinder.
INSPECTION AFTER DISASSEMBLY
Cylinder Body
Check the inner wall of cylinder for corrosion, w ear, and damage. Replace cylinder body as necessary.
CAUTION:
Clean cylinder body using new brake fluid. Never use mineral oils such as gasoline or kerosene.
Torque Member
Check for wear, cracks, and damage. R eplace torque member as necessary.
Piston
Check piston surface for corrosion, wear, and damage. Replace piston as necessary.
CAUTION:
The piston sliding surface is plated . Do not polish with sandpaper.
Sliding Pin, Sliding Pin Bolt, and Sliding Pin Boot
Check sliding pins, sliding pin bolts and sliding pin boots for wear, damage, and cracks. Replace applicable
part as necessary.
DISC ROTOR INSPECTION
Visual Inspection
Check surfaces of disc rotor for uneven wear, cr acks, and serious damage. Replace as necessary.
Runout Inspection
1. Using wheel nuts, secure disc rotor to wheels hub at two or more positions. SBR556E
WFIA0525E
SFIA2277E

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5. Connect the parking brake rear cable to the operating lever.
6. Install the shoe assembly. After assembly, be sure that each part is installed properly. CAUTION:
Do not damage the wheel cylinder piston boot.
7. Install the brake drum.
8. Depress brake pedal for several times (approximately 2 or 3 times).
9. Adjust clearance of brake shoe. Refer to PB-5, " On-Vehicle Service " .
10. Install rear wheel and tire. Refer to WT-7, " Rotation " .
Removal and Installati on of Wheel Cylinder INFOID:0000000004305917
REMOVAL 1. Drain the brake fluid. Refer to BR-9, " Drain and Refill " .
2. Remove the rear brake shoe assembly. Refer to BR-34, " Removal and Installation of Drum Brake Assem-
bly " .
3. Remove the bleed valve.
4. Disconnect the brake tube from the wheel cylinder.
5. Remove the wheel cylinder bolts and then remo ve the wheel cylinder from the back plate.
INSTALLATION Installation is in the reverse order of removal.
• Tighten bolts and bleed valve to the specified torque. Refer to BR-33, " Component " .
• Refill with new brake fluid and bleed the air. Refer to BR-9, " Bleeding Brake System " .
Disassembly and Assemb ly of Wheel Cylinder INFOID:0000000004305918
DISASSEMBLY 1. Remove boots at the right and left of the wheel cylinder, and pull the pistons and spring out of the cylinder.
2. Remove the piston cups from the pistons.
INSPECTION AFTER DISASSEMBLY Check the pistons, spring and inner wall of the cylinder for wear, corrosion, and damage. Replace any parts as
necessary.
ASSEMBLY CAUTION:
When inserting the piston, be caref ul not to scratch the cylinder.
1. Apply brake fluid to the piston sliding surface on the wheel cylinder.
2. Apply rubber grease to the piston cups and boots and assemble the wheel cylinder as shown.

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ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and Installation INFOID:0000000004307283
CAUTION:
• Before servicing, disconnect battery negative terminal.
• To remove brake tube, use flare nut wrench to pr event flare nuts and brake tube from being dam-
aged. To install, use flare nut torque wrench, ti ghten flare nut to the specified torque. Refer to BR-11," Hydraulic Circuit " .
• Do not apply excessive impact to ABS actuator and elect ric unit (control unit), such as dropping it.
• Do not remove and install actuator by holding harness.
• After work is completed, bleed the air from the brake hydraulic system. Refer to BR-9, " Bleeding
Brake System " .
REMOVAL 1. Disconnect the battery negative terminal.
2. Remove the cowl top. Refer to EI-22, " Removal and Installation " .
3. Disconnect ABS actuator and electric unit (control unit) connector.
4. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit).
5. Remove brake booster hose from engine. Refer to BR-23, " Removal and Installation " .
6. Remove ABS actuator and electric unit (control unit) bracket bolts.
7. Remove ABS actuator and electric unit (control unit). 1. To front right caliper 2. To rear left wheel cylinder 3. To rear right wheel cylinder
4. To front left caliper 5. From master cylinder primary side 6. From master cylinder secondary side
7. ABS actuator and electric unit (control unit) 8. Harness connector Front