|
|
BASIC BRAKE SYSTEM DIAGNOSIS TSB Revision BASIC BRAKE SYSTEM 35A-9 INSPECTION PROCEDURE 3: Increased Pedal Stroke (Reduced Pedal-to-floor Board Clearance) DIAGNOSIS STEP 1. Check for spongy (not firm brakes). 40 times with the ignition switch at the "LOCK" (2) With the brake pedal fully released, depress the brake pedal slowly until it stops. (3) With a measuring stick (ruler, etc.) next to the brake pedal, depress the pedal firmly and Q: Is the distance greater than 20 mm (0.8 inch)? YES : Bleed the brakes to remove air in the fluid (Refer to NO : Go to Step 2. STEP 2. Check the pad for wear. Q: Is the pad thickness outside of specifications? YES : Replace the pads on both left and right wheels as a set. Then go to Step 5. NO : Go to Step 3. STEP 3. Check for brake fluid leaks. Q: Are there brake fluid leaks? YES : Check the connection for looseness, corrosion, etc. Clean and repair as NO : Go to Step 4. STEP 4. Check the HBB's master cylinder (2) Check the power piston assembly and the master cylinder piston assembly (Refer to Q: Are the HBB master cylinder pistons malfunctioning? Replace the faulty part. Then go to Step 5. NO : 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 INSPECTION PROCEDURE 4: Brake Drag DIAGNOSIS STEP 1. Check the parking brake lever return. Q: Does the lever return abnormally? YES : When a foreign matter is caught in the parking brake lever assembly, remove it. Then go to Step 8. NO : Go to Step 2. STEP 2. Check the parking brake pull amount. − Parking Brake Lever Stroke Check and Adjustment Q: Is the parking brake lever stroke out of specification? Adjust it. Then go to Step 8. NO : Go to Step 3. STEP 3. Inspect the brake pedal return spring for Q: Is there deterioration? YES : Replace the spring. Then go to Step 8. NO : Go to Step 4. STEP 4. Inspect the brake shoe springs for . Q: Are the brake shoe springs broken? YES : Replace the springs. Then go to Step 8. NO : Go to Step 5. |