Honda NSA700A DN-1 2009, Service Manual

Page: 568 / 654

ANTI-LOCK BRAKE SYSTEM (ABS)
PROBLEM CODE 11 12, 21, 41 or 42
(Front Wheel Speed Sensor)
NOTE:
• The ABS indicator m ight blink under unusual
riding or conditions (page 18-8).
This is tem p o rary failure. Erase the problem code
(page 18-7).
Then test ride th e m D torcycle abo ve 30 km /h
(18 m p h ) and check the problem code by retriev­
ing the self-diagnosis system (page 18-6).
• If the problem code 41 is indicated, check the
front brake for drag.
1. Speed Sensor Air Gap Inspection
M easure the clearance (air gap) betw een the
sensor and pulser ring (page 18-21).
Is th e a ir ga p c o rre c t?
NO - Check each part fo r defo rm ation and
looseness and correct accordingly.
Recheck the air gap.
YES
- GO TO STEP 2.
2.
Speed Sensor Condition Inspection
Inspect the area around the front w heel speed
sensor:
Check that there is no iron or other m agnetic
deposits betw een the pulser ring and w heel
speed sensor, and check the pulser ring slots for
obstructions.
Check installation condition of the pulser ring or
w heel speed sensor for looseness.
Check the pulser ring and sensor tip for d efor­
m ation or d am ag e (e.g., chipped pulser ring
teeth).
A re th e sensor a n d p u ls e r rin g in g o o d c o n d i­
tio n ?
NO - R em ove any deposits. Install properly
or replace faulty part.
YES - GO TO STEP 3.
3. Speed Sensor Line Short Circuit Inspection (at
sensor side)
Disconnect the fro n t w heel speed sensor 2P con­
nector.
Check fo r continuity betw een each term inal
(Blue and W h ite) o f the sensor side 2P connector
and ground.
CONNECTION: Blue-G round
W hite-G round
Is th e re c o n tin u ity ?
YES - Faulty front w heel speed sensor.
NO - G O TO STEP 4.
SPEED SENSOR
PULSER RING
FRONT W HEEL SPEED SENSOR 2P (ORANGE)
CONNECTOR (Sensor side o f m ale terminal)
18-12