Rear Brake Pad, Brake Caliper & Brake Rotor: Inspection

1. Inspect the cylinder bore and the piston for rust or scoring. If necessary, replace the rear disc brake cylinder assembly and piston.
   Fig 1: Releasing Parking Brake

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard thickness: 

   10.0 mm (0.394 in.) 

   Minimum thickness: 

   1.0 mm (0.039 in.) 

   Fig 2: Measuring Pad Lining Thickness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the pad lining thickness is less than the minimum, replace the brake pads.

   HINT:

   Be sure to check wear of the rear disc after replacing the brake pads with new ones.

1. Inspect the No. 1 rear disc brake pad support plate. If necessary, replace the No. 1 rear disc brake pad support plate.

   HINT:

   Make sure that it has sufficient rebound, and has no deformation, cracks or wear, and all rust and dirt are cleaned off.

HINT:

Inspect the No. 2 rear disc brake pad support plate using the same procedure with the No. 1 rear disc brake pad support plate. If necessary, replace the No. 2 rear disc brake pad support plate.

1. Using a micrometer, measure the disc thickness.

   Standard thickness: 

   10.0 mm (0.390 in.) 

   Minimum thickness: 

   8.5 mm (0.334 in.) 

   If the disc thickness is less than the minimum, replace the rear disc.

   Fig 3: Measuring Disc Thickness

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using SST to hold the rear disc, tighten the rear disc with the 5 nuts.

   SST 09330-00021 

   Torque: 103 N*m (1050 kgf*cm, 76 ft.*lbf) 

   Fig 4: Tightening Rear Disc With Nuts

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using a dial indicator, measure the disc runout 10 mm (0.394 in.) away from the outer edge of the rear disc.

   Maximum disc runout: 

   0.15 mm (0.0059 in.) 

   Fig 5: Measuring Disc Runout

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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 (for 2WD: See ON-VEHICLE INSPECTION , for 4WD: 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.

3. Remove the 5 hub nuts and the rear disc.