Sym GTS 250 Service Manual page 226

5. Idle Speed Control (stepping motor):
1). Illustration:
ISCBP
ISCAP
Pin2
Pin1
ISC coupler pin identification
2). Power Source:
By ECU.
3). Check procedure:
1. Electrical resistance examination:
a). Separate the Idle Speed Control coupler (The measurement can also been taken
on the throttle body)
b). Use the resistance mode on the electric meter (as figure 9)
ISCBN
ISCAN
Pin3
Pin4
Idle Speed Control Stepping Motor
11