Front Brake Pad, Brake Caliper & Brake Rotor: Inspection

INSPECT PAD LINING THICKNESS
1. Using a ruler, measure the pad lining thickness
Standard thickness: 9.8 mm (0.386 in.)

Minimum thickness: 1.0 mm (0.0394 in)

If the pad lining thickness is less than the minimum, replace the pad

NOTE: Be sure to inspect the front disc when replacing the brake pads with new ones.

Fig 1: Measuring Pad Lining Thickness
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FRONT DISC BRAKE ANTI-RATTLE SPRING
1. Make sure that the front disc brake anti-rattle spring has sufficient rebound, no deformation, cracks or wear, and that all rust and dirt are cleaned off. If necessary, replace the front disc brake anti-rattle spring
INSPECT FRONT DISC
1. Inspect the front disc for cracks. If there are any defects as mentioned below, replace the disc with a new one
- There is a crack more than 30 mm (1.18 in.) in length (including the hole diameter) (A in the illustration)
- There is a crack that reaches either the inner or outer edge of the disc (B in the illustration).
Fig 2: Identifying Front Disc For Cracks
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DISC THICKNESS
1. Using a micrometer, measure the disc thickness as shown in the illustration
  Standard thickness: 30.0 mm (1.18 in.)
  
  Minimum thickness: 28.0 mm (1.10 in.)
  
  If the disc thickness is less than the minimum, replace the disc.
  
  Fig 3: Measuring Disc Thickness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DISC RUNOUT
1. Using SST to hold the disc, tighten the disc with the 3 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 4: Tightening Disc With Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a dial indicator, measure the disc runout 7 mm (0 276 in.) away from the outer edge of the front disc.
  Maximum disc runout: 0.06 mm (0.00236 in.)
  
  Fig 5: Measuring Disc Runout Using Dial Indicator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. If the runout exceeds the maximum value, change the installation position of the disc to minimize runout. If the runout exceeds the maximum even when the installation position is changed, check the bearing play in the axial direction and the axle hub runout (See ON-VEHICLE INSPECTION ). If they are normal, and the disc thickness is not within the specified range, grind the disc If the disc thickness is less than the minimum, replace the disc.
4. Remove the front disc