Toyota Offers Special Service Tool for Brake System

Secure the gauge to the parking brake pedal with the gauge position on the right. Depress the pedal with your foot on the non-slip aluminum gauge assembly face by the number of click specified for the vehicle at hand. Relieve pressure and note the force reading on the gauge. 
|Photo Credit: Mitchell 1 

1. Place a plastic cover or shop rag on the carpet to protect against potential oil leak form the gauge. Make sure that the parking brake pedal is in the full release position.
2. Inspect the gauge and verify that the force indicator needle reads “0”. If it does not read 0, apply pressure to the gauge four or five times with the needle travelling beyond 250 Newtons, then lightly lift the pedal pad and check if the gauge resets at 0. If it still does not reset to 0, remove the plastic clear bezel and use pliers to turn the adjustment knob to set the needle to 0 and install the bezel cover.
3. Attach the gauge to the parking brake pedal so that the mounting bracket fit securely over the pedal pad and the gauge faces to the right towards the brake pedal.
4. Firmly depress the gauge with your foot. Follow the specification in the repair manual, as the number of clicks and force applied to the parking brake pedal may vary from vehicle to vehicle.
5. Read the maximum force achieved during parking brake pedal inspection by relieving the pressure applied to the gauge plunger platform (non-slip aluminum face) and observe the force value recorded by the red indicator.
6. To reset the gauge, turn the white knob counterclockwise until the red needle reads “0”.
7. Verify the force measurement according to the appropriate repair manual.