Toyota 4A-FE Repair Manual page 108

EFI SYSTEM -
Troubleshooting
with Volt/Ohmmeter
Fl-39
No.
1
Terminals
+B - E1
+B1
Trouble
No voltage
(AT}
FL MAIN 0.85R
Voltmeter
CL]
0:
Voltmeter
cu
[9:
0
- FL
u;
I-
MAIN -
<t: . . . . . . . .
2.0L -
Battery
ECU
1
ECU
Ohmmeter
[JLJ
0
o~I
I:)
~
(AE)
CD
Fl4253
CV
Fl4039
@
Fl4040
Condition
IG SW ON
Fuse
EFI
15A
EFI Main Relay
Fuse
IGN
7.5A (AE)
10A (AT)
1
STD voltage
10-14V
ECU
'---------() +
B 1
E1
Fl6177
CD
There is no
voltage between ECU terminals +B (+81) and E1.
(IG SW ON)
®
Check that there is voltage between EC U term ina I + B ( + B 1 )
and body ground. (IG SW ON)
NO
l
OK
@Check wiring between ECU terminal E1 and body
ground.
l
OK
!
BAD
Try
another
ECU.
Repair or replace.
'I
Check fuses, fusible links and
BAD
Repair or replace.
ignition switch.
OK
Check EFI main relay.
~1
Replace.
(See page Fl-1 34)
OK
Check wiring between EFI main BAD
Repair or replace.
relay and battery.
I