Symptom |
Possible causes |
Action |
Brake noise |
- Debris
- Brake pads
- Brake disc(s)
|
Refer to the relevant section of the workshop manual. |
Brake vibration |
- Suspension components
- Brake disc(s)
|
Refer to the relevant section of the workshop manual. |
Excessive brake pedal travel/brake pedal spongy |
- Brake pads
- Air in the brake system
- Brake master cylinder
- Brake fluid leak (see visual inspection)
|
Worn pads may make the pedal travel excessive, new pads may
make the pedal spongy. Check after bedding in the pads. Check the pedal
travel. If the pedal "pumps-up", suspect air in the system. Check for a
cause for air ingress, rectify as necessary. If the pedal sinks to the
floor when held under pressure when there are no external leaks, suspect a
master cylinder fault. Refer to the relevant section of the workshop
manual. |
Excessive brake pedal effort/brake pedal hard |
- Brake pipe(s)
- Brake caliper slide(s)
- Brake caliper piston(s)
- Brake vacuum pipe
- Brake vacuum pump
- Brake booster
|
Check for damaged brake pipes. Check the brake calipers.
Check the brake vacuum pipe for air leaks, rectify as necessary. Check the
brake vacuum pump operation. Refer to the relevant section of the workshop
manual. Check the brake booster. |
Low foot brake efficiency/brakes pulling/sticking/binding
|
- Brake pipe(s)
- Pads
- Brake caliper piston(s)
- Brake caliper slide(s)
- Brake disc(s)
|
Check the vehicle for damaged brake pipes. Inspect the brake
pads. Check the brake calipers. Check the brake discs. Refer to the
relevant section of the workshop manual. |
Parking brake will not engage or release |
- Parking brake cables
- Parking brake shoes
- Parking brake adjusters
- Rear brake disc(s)/parking brake drum(s)
- Parking brake actuator malfunction
|
Check the parking brake cable(s) for operation/condition.
Check that the cable end connector(s) are correctly installed to the
operating lever(s). Inspect the parking brake shoes for wear. Check the
parking brake shoes for correct adjustment. Check the rear brake
disc(s)/parking brake drum(s). Check the parking brake actuator for damage
and/or excessive noise in normal operation. Refer to the relevant section
of the workshop manual. |
Low parking brake efficiency/parking brake sticking/binding
|
Brake warning indicator staying illuminated |
- Brake reservoir fluid level
- Brake pads
- Brake pad wear sensor leads
- Brake fluid level sensor
|
Check the brake fluid level, top up if required. Inspect the
brake pads. Check the brake pad sensor circuit. Refer to the electrical
guides. Check the function of the brake fluid level sensor. Refer to the
relevant section of the workshop manual.
|