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.

Toyota 4A-FE Specifications

General

Engine Type	Inline-4
Fuel System	EFI (Electronic Fuel Injection)
Valvetrain	DOHC, 4 valves per cylinder
Bore x Stroke	81.0 mm x 77.0 mm
Compression Ratio	9.5:1
Fuel Type	Gasoline
Displacement	1587 cm3
Power Output	115 hp (86 kW) @ 6000 rpm
Redline	6, 400–6, 800 rpm