Rear Brake Caliper: Inspection

Using a ruler, measure the pad lining thickness.

Standard thickness: 10.5 mm (0.413 in.) 

Minimum thickness: 1.0 mm (0.039 in.) 

Replace the pads if the thickness is less than the minimum or if it shows signs of uneven wear.

Fig 1: Measuring Pad Lining Thickness

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a micrometer, measure the disc thickness.

Standard thickness: 12.0 mm (0.472 in.) 

Minimum thickness: 10.5 mm (0.413 in.) 

Replace the disc if the thickness of the disc is at the minimum thickness or less. Replace the disc or grind it on a lathe if it is badly scored or worn unevenly.

Fig 2: Measuring Rear Brake Disc Thickness

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using a dial indicator, measure the disc runout at a position 10 mm (0.394 in.) away from the out side edge.

Maximum disc runout: 0.05 mm (0.0020 in.) 

Fig 3: Measuring Rear Brake Disc Run Out

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the disc's runout is maximum value or greater, check the bearing play in the axial direction and check the axle hub runout (See REAR AXLE CARRIER ). If the bearing play and axle hub runout are not abnormal, adjust the disc runout or grind it on a "On-Car" brake lathe.

1. Remove the 3 hub nuts and disc. Turn the disc 1/5 and reinstall the disc. Install and torque the 3 hub nuts.

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

2. Remeasure the disc runout. Make a note of the runout and the disc's position on the hub.
3. Repeat (b) until the disc has been installed on the 3 remaining hub positions.
4. If the minimum runout recorded in (b) and (c) is less than 0.05 mm (0.0020 in.), install the disc in that position.
5. If the minimum runout recorded in (b) and (c) is greater than 0.05 mm (0.0020 in.), replace the disc and repeat step  3.