Idle Speed Control (Isc) Valve (4A-Fe - Toyota 4A-FE Repair Manual

Fl-158
2WD
FL
ALT 1 OOA
(AE, AT180)
BOA (AT171)
FL
MAIN
2.0L
Battery
c:=:£L]
Ohmmeter
0
Ohmmeter
"T"
I
I
---1....--
EFI SYSTEM - Electronic Control System
FL
Idle Speed Control (ISC) Valve
(4A-FE)
Netural Start Switch
ECU
AM1 AM1
- ~
" ,....____.
40A
(AE, AT180)
60A
(A T171)
F14S87
From EFI
Main Relay
_[
INSPECTION OF ISC VALVE
INSPECT ISC VALVE
A. Inspect ISC Valve for open circuit
+B (+81)
F15347
Using an ohmmeter, check that there is continuity bet-
ween the terminals.
B.
Resistance: 2WD 30 - 33
0
If there is no continuity, replace the ISC valve.
Inspect ISC valve for ground
Using an ohmmeter, check that there is no continuity bet-
ween each terminal and body .
If there is continuity, replace the ISC valve.