300Tdi Discovery
70
BRAKES
2
FAULT DIAGNOSIS
ABS FAULT AND REMEDY CHART
SYMPTOM
POSSIBLE CAUSE
CHECK
REMEDY
ABS warning light on
ABS electrical fault
Check ABS electrical
circuit with Testbook
diagnostic equipment
Change component if
necessary
High sensor air gaps
Push in sensors
Brake fluid warning light
ON
Fluid loss
Check reservoir fluid level
and inspect system for
leaks
Rectify leakage, refill
reservoir
Reservoir fluid level
switch malfunction
Check fluid level switch
Change reservoir
cap/switch
Pedal travel increased,
foot pressure normal
Air in system
Rebleed brake system
Master cylinder
malfunction
Change master cylinder
Pedal can be moved
downwards under
constant pressure
Seal leaking in master
cylinder
Inspect system for leaks
Change master cylinder
Seal leaking in servo unit
Change servo unit
