SERVICE BRAKES Troubleshooting
Symptom
Insufficient braking
power
Probable cause
Low or deteriorated brake fluid
Air in brake system
Overheated brake rotor due to dragging of pad or
lining
Remedy
Refill or change
Bleed air
Correct
Inadequate contact of pad or lining
Brake booster malfunction
Clogged brake line
Grease or oil on pad or lining surface
Replace
Proportioning valve malfunction
Auto adjuster malfunction
Adjust
Increased pedal stroke
Air in brake system
Bleed air’
(Reduced pedal to floor-
board clearance)
Worn lining or pad
Replace
Broken vacuum hose
Faulty master cylinder
Brake fluid leaks
Correct
Auto adjuster malfunction
Adjust
Excessive push rod to master cylinder clearance
Brake drag
Incomplete release of parking brake
Correct
Clogged master cylinder return port
Incorrect parking brake adjustment
Adjust
Improper push rod to master cylinder clearance
Faulty master cylinder piston return spring
Replace
Worn brake pedal return spring
Broken rear drum brake shoe return spring
Lack of lubrication in sliding parts
Lubricate
Insufficient parking
Worn brake lining or pad
Replace
function
Grease or oil on lining or pad surface
Parking brake cable sticking
Stuck wheel cylinder or caliper piston
Excessive parking brake lever stroke
Adjust the parking brake lever
stroke or check the parking brake
cable routing
Auto adjuster malfunction
Adjust
TSB Revision
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