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6-36
FI
EAS00916
CHECKING THE ISC (IDLE SPEED CON-
TROL) VALVE
TIP
Do not remove the ISC (idle speed control) valve
unit completely from the throttle body assembly.
1. Check:
8ISC (idle speed control) valve
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the ISC (idle speed control)
valve coupler from the ISC (idle speed con-
trol) valve.
b. Connect the digital circuit tester to the ter-
minals of the ISC (idle speed control) valve.
Positive tester probe
JJ
JJ
J pink terminal
11
11
1
Negative tester probe
JJ
JJ
J green/yellow
terminal
22
22
2
Positive tester probe
JJ
JJ
J gray terminal
33
33
3
Negative tester probe
JJ
JJ
J sky blue terminal
44
44
4
Digital circuit tester
90890-03174
c. Measure the ISC (idle speed control) valve
resistance.
Out of specification J Replace the throttle
body.
ISC (idle speed control) valve resis-
tance
20
ΩΩ
ΩΩ
Ω at 20°C(68°F)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
THROTTLE BODY AND FUEL INJECTOR
1
4 3
2
P
G/Y
Sb
Gy
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