Toyota 3F-E Repair Manual Supplement page 101

FI-42
No.
Terminals
10
W — El
EFI SYSTEM —
Troubleshooting with Volt/Ohmmeter
Trouble
No trouble ("CHECK" engine warning
No voltage
light off) and engine running
O
Check GAUGE fuse (7.5A) and "CHECK"
engine warning light.
Check wiring between ECU
terminal W and fuse.
Condition
There is no voltage between ECU terminals W and El .
(Idling)
Check that there is voltage between ECU terminal W and
body ground.
NO OK
Check wiring between ECU terminal El and body
O
ground.
OK
Try another ECU.
OK BAD
Repair or replace.
Fuse blows again
STD Voltage
10 — 14 V
ECU
F10728
BAD
Repair or replace.
BAD
Repair or replace.