Toyota 2VZ-FE Manual page 150

FI–44
EFI SYSTEM – Air Induction System (Idle Speed Control (ISC) Valve)
Idle Speed Control (ISC) Valve
ON–VEHICLE INSPECTION
1. CHECK FOR OPERATING SOUND FROM ISC VALVE
Check that there is a clicking sound immediately stopping the
engine.
2. INSPECT ISC VALVE RESISTANCE
(a) Disconnect the ISC valve connector.
(b) Using an ohmmeter, measure the resistance between
terminal B1 – S1 or S3, and B2 – S2 or S4.
Resistance:
If resistance is not as specified, replace the ISC valve.
(c) Reconnect the ISC valve connector.
REMOVAL OF ISC VALVE
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL OF
BATTERY
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the "LOCK" position and the negative (–) termi-
nal cable is disconnected from the battery.
2. DRAIN ENGINE COOLANT (See page CO–5)
B1 – S1 or S3 10 – 30
B2 – S2 or S4 10 – 30