Front Brake Pad, Brake Caliper & Brake Rotor: Inspection

1. Check the cylinder bore and piston for rust or scoring.

If necessary, replace the disc brake cylinder assembly and piston.

1. Using a ruler, measure the pad lining thickness.

Standard thickness: 11.0 mm (0.433 in.) 

Minimum thickness: 1.0 mm (0.039 in.) 

If the pad lining thickness is equal to the minimum thickness or less, replace the brake pad kit front.

Fig 1: Measuring Pad Lining Thickness

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Make sure that they have sufficient rebound, no deformation, cracks or wear, and have had all rust and dirt cleaned off.

   If necessary, replace the pad support plate (No. 1 and No. 2).

1. Using a micrometer, measure the disc thickness.

   Standard thickness: 25.0 mm (0.984 in.) 

   Minimum thickness: 23.0 mm (0.906 in.) 

   Fig 2: Measuring Disc Thickness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Temporarily fasten the disc with hub nuts.

   Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf) 

2. Using a dial indicator, measure the disc runout 10 mm (0.39 in.) away from the outer edge of the disc.

   Maximum disc runout: 0.05 mm (0.0020 in.) 

   Fig 3: Measuring Disc Runout

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. If the disc runout is the maximum value or greater, check the bearing play in the axial direction and check the axle hub runout (See ON-VEHICLE INSPECTION ). If the bearing play and axle hub runout are normal, adjust the disc runout or grind it on a "On-car" brake lathe.