SERVICE AND TOOLS2008 MODEL YEAR TECHNICAL FORUM
NEW ABS Brake Bleeding Procedure
• See service manual for proper
brake line routing
• ABS equipped motorcycles will have a
different feel from motorcycles without this
feature
• See brake bleed instructions using
Digital Technician™ II
• Service replacement ABS modules will
come primed/filled from Harley-Davidson
®
but will still require the brake bleed
procedure to be performed using DT II
SERVICE AND TOOLS2008 MOD EL YEAR TECHNICAL FORUM
Normal operation - speed of ABS reaction interfacing with frequency of road conditions
signaling wheel lock up
No braking over a series of ripples
or bumps
Normal operation – ABS does not activate on front wheel below 3 MPH (5KM/H) or on
rear wheel below 5 MPH (8 KM/H).
Wheel lock at low speed
Normal operation – depending on surface, tire can leave a black mark without locking
the wheel.
Black mark on pavement
Normal operation – depending on surface, tire can chirp without locking the wheel.Tire chirp
Normal operation – engine braking (high engine RPMs causing the rear wheel to slow
down) or down shifting activates ABS. If applying the rear brake at the same time or
immediately after, the ABS may be closing a valve to prevent pressure to the rear brake.
Temporarily stiff rear brake pedal
Normal operation – noticeable when braking with one brake (front only or rear only).
Result of a reduction in deceleration normally caused by cracks or bumps in road,
engine braking (high engine RPMs causing the rear wheel to slow down), hard braking
at slow speeds, and other conditions.
Perceived “surge” while braking
ABS inoperative – refer to dealer for diagnostics.ABS continuously illuminated
Normal operation - key turned to IGNITION – speed under 3 MPH (5 KM/H).ABS lamp flashing
Normal operationClicking sound during an ABS event
Normal operationPulsing brake lever or pedal during
an ABS event
CONDITIO NABS SYMPTOMS
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