Yamaha FX Nytro FX10MTRAX, Service Manual, Page: 636 / 859

7-26
FI
FUEL INJECTION SYSTEM
ISC (IDLE SPEED CONTROL) UNIT
NOTE:
Do not remove the ISC (idle speed control) unit
completely from the throttle body.
1. Inspect:
• ISC (idle speed control) unit
Inspection steps:
• Disconnect the ISC (idle speed control) unit
coupler from the ISC (idle speed control) unit.
• Connect the pocket tester (
Ω ×
10) to the termi-
nals of the ISC (idle speed control) unit.
• Measure the ISC (idle speed control) unit resis-
tance.
Out of specification
→
Replace the throttle
body.
Positive tester probe
→
Red/Green
1
Negative tester probe
→
White/Green 2
Positive tester probe
→
Brown/Blue
3
Negative tester probe
→
Pink/Blue 4
Pocket tester:
90890-03112
Analog pocket tester:
YU-03112-C
ISC (idle speed control) unit resis-
tance:
57 ~ 63
Ω
at 20 °C (68 °F)
R/G
P/L
R/Y
Br/L
W/G
R/Y
2
1
3
4