ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
18-12
ABS INDICATOR STAYS ON (–Indicator does not go
off when the scooter is running, –Problem code is
not indicated by the retrieval procedure)
1. Fuse Inspection
Check the "ABS MAIN" fuse (10 A) in the fuse
box.
Is the fuse blown?
YES – GO TO STEP 2.
NO – GO TO STEP 3.
2. ABS Power Input Line Short Circuit Inspection
Disconnect the ABS modulator 25P connector.
Check for continuity between the ABS modulator
connector of the wire harness side and ground
with "ABS MAIN" fuse removed.
Is there continuity?
YES – Short circuit in Black/Yellow wire
between the fuse box and ABS modula-
tor.
NO – Intermittent failure. Replace the "ABS
MAIN" fuse (10 A) with a new one, and
recheck.
3. ABS Power Input Line Open Circuit Inspection
Install the "ABS MAIN" fuse.
Disconnect the ABS modulator 25P connector.
Measure the voltage between the ABS modula-
tor of the wire harness side with the ignition
switch turned "ON".
Does the battery voltage exist?
YES – GO TO STEP 4.
NO – • Open circuit in Black/Yellow wire
between the fuse box and ABS mod-
ulator.
• Open circuit in Green wire between
the ABS modulator and body
ground.
• Loose or poor contact on the connec-
tor
CONNECTION: Black/Yellow – Ground
Black/Yellow
ABS MODULATOR
25P CONNECTOR
CONNECTION: Black/Yellow (+) – Green (–)
Black/Yellow
ABS MODULATOR
25P CONNECTOR
Green
Green
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