Checking The Isc (Idle Speed Control) Unit; Checking The V-Belt Replacement Indicator Reset Coupler - Yamaha 2010 XMAX YP125R Service Manual

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
b. Immerse the air temperature sensor "1" in a
container filled with water "2".
TIP
Make sure that the air temperature sensor termi-
nals do not get wet.
c. Place a thermometer "3" in the water.
3
d. Heat the water or let it cool down to the spec-
ified temperatures.
e. Measure the air temperature sensor resis-
tance.
L LLL L LLL L L LLL L
EAS37P1085
CHECKING THE ISC (IDLE SPEED
CONTROL) UNIT
TIP
Do not remove the ISC unit completely from the
throttle body.
1. Check:
• ISC unit
M MMM M MMM M M MMM M
a. Disconnect the ISC unit coupler from the ISC
unit.
b. Connect the pocket tester (Ω × 10) to the ter-
minals of the ISC unit.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
pink "1"
• Negative tester probe →
light green "2"
1
2
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
ELECTRICAL COMPONENTS
• Positive tester probe →
green "3"
• Negative tester probe →
sky blue "4"
4
3
c. Measure the ISC unit resistance.
Out of specification → Replace the throttle
body.
L LLL L LLL L
EAS37P1084
CHECKING THE V-BELT REPLACEMENT
INDICATOR RESET COUPLER
1. Remove:
• V-belt replacement indicator reset coupler
LLL
2. Check:
• V-belt replacement indicator reset coupler
Out of specification → Replace the V-belt re-
placement indicator coupler.
MMM
8-90
2
Lg
P
1
ISC unit resistance
27–33 Ω at 20 °C (68 °F)
L LLL L L LLL L L LLL L
Continuity
Positive tester probe → black
"1"
Negative tester probe → black
"2"
Continuity
Positive tester probe → black
"2"
Negative tester probe → black
"1"
1 2
B
B
Sb
G
L LLL L LLL