Sym GTS 250 Service Manual page 245

Step 3. Please read time gap chart below (Picture C) to learn how to read the error
message correctly.
The error messages are combined with two different blinking, long or short. Please read the error
message very carefully. In order to identify each error message from each other,
There are two kinds of time gaps in Keihin blinking error message.
1. 3 Seconds gap:
2. 6 Seconds gap:
Step 4. The check light will stop blinking after problem fixed, however there would
be a trouble code record in the ECU. The trouble code record can be
removed by either manually or by Diagnostic tool.
1. Removed TB code by Diagnostic Tool: Connect the Diagnostic tool with the
scooter. Choose "Erase TB Code" (Picture D). Please erase the TB code after
repair every time.
Picture C
To identify different Error message from each other.
This gap means the CHK light will show all previous message
again after this 6-second gap.
Picture D