Honda SH300 2006 Manual page 492

IMMOBILIZER SYSTEM (HISS)
When the system (ECM) enters the diagnostic mode from the registration mode:
23-8
BLINKING PATTERN SYMPTOM PROBLEM
Registration is The key is
overlapped already regis-
tered properly
Code signals Communication
cannot send or fails
receive
Registration is The key is
impossible already regis-
tered on the
other system
PROCEDURE
Use a new key or
cancelled key
Follow the trouble-
shooting (page 23-
9)
Use a new key