Honda SH300 2006 Manual page 414

ANTI-LOCK BRAKE SYSTEM (ABS; SH300A/AII/AIII)
2. Relay Power Input Line Short Circuit Inspection
Disconnect the ABS modulator 25P connector.
Check for continuity between the ABS modulator
25P connector of the wire harness side and
ground with "ABS FSR" fuse removed.
CONNECTION: Black – Ground
Is there continuity?
YES
NO
3. Relay Power Input Line Open Circuit Inspection
(at control unit side)
Install the "ABS FSR" fuse (30 A).
Disconnect the ABS modulator 25P connector.
Measure the voltage between the ABS modula-
tor 25P connector from the wire harness side.
There should be battery voltage at all times.
CONNECTION: Black (+) – Green (–)
Is there battery voltage?
YES
NO
4. Failure Reproduction
Turn the ignition switch "OFF".
Connect the ABS modulator 25P connector.
Erase the problem code (page 18-9).
Test ride the scooter above 30 km/h (18 mph).
Retrieve the problem code (page 18-8).
Does the indicator blink 54 times?
YES
NO
18-20
– Short circuit in Black wire between the
fuse box and ABS modulator.
– Temporary failure. Replace the "ABS
FSR" fuse (30 A) with a new one and
recheck.
– GO TO STEP 4.
– • Open circuit in Black wire and/or Red
wire between the battery and ABS
modulator.
• Open circuit in Green wire between
the ABS modulator and ground.
• Loose or poor contact on the connec-
tor.
– Faulty ABS modulator.
– Fail-safe relay is normal (temporary fail-
ure).
Black
ABS MODULATOR
25P CONNECTOR
Black
ABS MODULATOR
25P CONNECTOR
ABS INDICATOR
Green
Green