Toyota 4A-FE Repair Manual page 112

No. Terminals
5 W - E1
From
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter
Trouble
No voltage
Condition
No trouble ("CHECK ENGINE" warning
light off) and engine running.
Fuse
GAUGE
- L _ _ _
j~-----~---~~~-..i\N
Fl-43
STD voltage
10 - 14
v
ECU
Ignition
Switch (IG 1)
'<J -
"CHECK ENGINE"
7.5A (AE, AT171)
1 5A (AT180) Warning Light
ECU
Voltmeter
lIJ
0
ECU
Voltmeter
CY::::]
0
0
: KJr+-----+--------+------'
0
Ohmmeter
1 =-- ri
J
ECU
Ojrt---1 , -
Combination Meter
.-----< 1
El
--
FI0728
CD
CD
There is no voltage between ECU terminals Wand El.
(ldlingl
®Check that there is voltage between ECU terminal W and body
ground.
NO
l
OK
Fl4046
@
Check wiring between
ECU
terminal
E 1
ground.
and body
l
OK
l
BAD
Try
another ECU.
I
Repair or replace.
Check GAUGE fuse and "CHECK
ENGINE" warning light.
OK
l
BAD
F14047
I
Repair or replace.
®
t
l
Fuse blows again
Check wiring between ECU terminal
BAD IR . I
Wand fuse.
= epaar or rep ace.
Fl4040
I