Front Brake Pad, Brake Caliper & Brake Rotor: Inspection

INSPECT PAD LINING THICKNESS
1. Using a ruler, measure the pad lining thickness.
  Standard thickness: 12.0 mm (0.472 in.)
  
  Minimum thickness: 1.0 mm (0.039 in.)
  
  If the pad lining thickness is less than the minimum, replace the brake pads.
  
  HINT:
  
  Be sure to check wear of the front disc after replacing the brake pads with new ones.
  
  Fig 1: Measuring Pad Lining Thickness Using Ruler
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DISC THICKNESS
1. Using a micrometer, measure the disc thickness.
  Standard thickness: 28.0 mm (1.102 in.)
  
  Minimum thickness: 25.0 mm (0.983 in.)
  
  If the disc thickness is less than the minimum, replace the front disc.
  
  Fig 2: Measuring Disc Thickness Using Micrometer
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT BRAKE CYLINDER AND PISTON
1. Check the cylinder bore and piston for rust or scoring. If necessary, replace the disc brake cylinder assembly and piston.
INSPECT FRONT DISC BRAKE PAD SUPPORT PLATE
1. Inspect the front disc brake pad support plate. If necessary, replace the front brake pad support plate.
  HINT:
  
  Make sure that the pad support plate has sufficient rebound, no deformation, cracks or wear, and that all rust and dirt are cleaned off.
INSPECT DISC RUNOUT
1. Using SST to hold the disc, tighten the disc with the 3 hub nuts.
  SST 09330-00021
  
  Torque: 103 N*m (1050 kgf*cm, 76 ft.*lbf)
  
  HINT:
  
  Use SST to hold the disc while tightening the nuts.
  
  Fig 3: Using SST To Hold Disc & Tighten Disc With Hub Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a dial indicator, measure the disc runout 10 mm (0.39 in.) away from the outer edge of the front disc.
  Maximum disc runout: 0.05 mm (0.0020 in.)
  NOTE:
  - Keep the magnet of the dial indicator away from the axle hub and speed sensor.
  - Install the dial indicator to the shock absorber.
  HINT:
  
  If the runout exceeds the maximum value, change the installation position of the disc on the rear axle hub to minimize runout. If the runout exceeds the maximum even after the installation position is changed, check the bearing play in the axial direction and the axle hub runout (See ON-VEHICLE INSPECTION ). If the bearing play and the axle hub runout are normal and if the disc thickness is not within the specified range, grind the disc. If the disc thickness is less than the minimum, replace the disc.
  
  Fig 4: Measuring Disc Runout Using Dial Indicator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the 3 hub nuts and the front disc.