Inspection Procedure 1: Vehicle Pulls to One Side When Brakes Are Applied

INSPECTION PROCEDURE 1: Vehicle Pulls to One Side when Brakes are Applied

DIAGNOSIS

STEP 1. Check for oil, water, etc., on the pad contact surface of all brakes.
Q: Is oil, water, etc., on the pad contact surface?
YES: Replace the part and determine the source/cause of foreign material. Then go to Step 5.
NO: Go to Step 2.

STEP 2. Check disc brake pistons for smooth operation.
(1) With engine not running, depress the brake pedal rapidly several times to deplete booster vacuum reserves.
(2) Test each disc brake assembly one at a time.
a. Remove the lower caliper bolt, then remove caliper from mount.
b. Have an assistant slowly depress the brake pedal. Confirm piston(s) extend slowly and smoothly with no jumpiness. Repeat for each disc brake assembly.
Q: Do (does) the piston(s) move correctly?
YES: Go to Step 3.
NO: Disassemble and inspect the brake assembly (Front: Rear:). Then go to Step 5.

STEP 2. Check for spongy (not firm) brakes.
(1) With engine not running, depress the brake pedal rapidly several times to deplete the booster vacuum reserve.
(2) With the brake pedal fully released, depress the brake pedal slowly until it stops.
(3) With a measuring device (ruler, etc.) next to the brake pedal, depress the pedal firmly and measure the distance the pedal traveled.
Q: Is the distance greater than 20 mm (0.8 inch)?
YES: Bleed the brakes to remove air in the fluid. Then go to Step 6.
NO: Go to Step 3.

STEP 3. Check brake disc(s) for runout.
Q: Is runout outside of specifications?
YES: Repair or replace the brake disc(s) as necessary. Then go to Step 5.
NO: Go to Step 4.

STEP 4. Check brake discs for correct thickness.
Q: Is the thickness outside of specifications?
YES: Repair or replace the brake disc(s) as necessary. Then go to Step 5.
NO: Perform the brake line bleeding. Then go to Step 5.

STEP 5. Retest the system.
Q: Is the symptom eliminated?
YES: The procedure is complete.
NO: Start over at Step 1. If a new symptom appears, refer to the appropriate symptom chart.