Inspection [08/2013 - ]

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT BRAKE DISC INSIDE DIAMETER
1. Using a brake drum gauge or an equivalent tool, measure the inside diameter of the disc.
  
  Fig 1: Measuring Inside Diameter Of Disc
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard inside diameter
  
  173 mm (6.81 in.)
  
  Maximum inside diameter
  
  174 mm (6.85 in.)
  
  If the inside diameter is more than the maximum, replace the rear disc.
INSPECT PARKING BRAKE SHOE LINING THICKNESS
1. Using a ruler, measure the thickness of the parking brake shoe lining.
  
  Fig 2: Measuring Thickness Of Parking Brake Shoe Lining
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard thickness
  
  3.35 mm (0.131 in.)
  
  Minimum thickness
  
  1.0 mm (0.0394 in.)
  
  If the lining thickness is less than the minimum, or if there is severe or uneven wear, replace the parking brake shoe assembly.
  
  NOTE:
  Always replace both right and left parking brake shoes together.
INSPECT BRAKE DISC AND PARKING BRAKE SHOE LINING FOR PROPER CONTACT
1. Apply chalk to the inside surface of the disc, then slide the brake shoe against the disc to check the fit of the brake shoe lining to the disc.
  
  Fig 3: Grinding Down Brake Shoe Lining
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the contact between the disc and the brake shoe lining is incorrect, repair it using a brake shoe grinder or replace the parking brake shoe assembly.
  NOTE:
  - Always replace both right and left parking brake shoes together.
  - Wipe off the chalk after inspection.