Rear Brake Pad, Brake Caliper & Brake Rotor: Inspection

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT PAD LINING THICKNESS
1. Using a ruler, measure the pad lining thickness.
  Standard thickness:
  
  11.5 mm (0.453 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 rear disc when replacing the brake pads with new ones.
INSPECT REAR DISC BRAKE ANTI-RATTLE SPRING
1. Make sure that the rear 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 rear disc brake anti-rattle spring
INSPECT REAR DISC
1. Inspect the rear 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 (118 in.) in length (include 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 1: Identifying Rear Disc Cracks
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DISC THICKNESS
1. Using a micrometer, measure the disc thickness
Standard thickness:

28.0 mm (1.10 in.)

Minimum thickness:

26.0 mm (1.02 in.)

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

Fig 2: 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 3: 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 rear disc
  Maximum disc runout:
  
  0.06 mm (0.00236 in.)
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 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
4. Remove the rear disc