Toyota Land Cruiser 1988 Repair Manual page 173

Fl-42 EFI SYSTEM -Troubleshooting with Volt/ Ohmmeter
No. Terminals Trouble Condition STD Voltage
10 W-E1 No voltage
No trouble ("CHECK" engine warning
8-14
v
light off) and engine running
ECU
FUSE
--<:::~"""" "
w
GAUGE 7.5A
"CHECK" Engine
Warning Light
E1
Combination Meter
~
FI072S
CD
There is no voltage between ECU terminals W and E1.
(Idling)
®
Check that there is voltage between ECU terminal W and
body ground.
NO
~OK
@
Check wiring between ECU terminal E1 and body
ground.
!OK
!
BAD
Try
another ECU.
I
Repair or replace.
Check GAUGE fuse (7.5A) and "CHECK"
engine warning light. ·
OK
!
BAD
I
Repair or replace.
@
~
Fuse blows again
Check wiring between ECU
BAD
terminal W and fuse.
Repair or replace.