Toyota 7M-GE Repair Manual page 178

EFI SYSTEM
- Troubleshooting with Volt/Ohmmeter (MS)
FI-61
-.
ECU
@
I
ECU
I
I
ECU
. IG S/W - El
._
0
There is no voltage between ECU terminals IG S/W and El.
(IG S/W ON)
I
I
0
Check that there is voltage between ECU terminal IG S/W and
body ground. (10 S/W ON)
,
1
1
Check wiring between ECU terminal El and body
ground.
I
,
I
I
Check fuse, fusible link and
ignition switch.
BAD
) Repair or replace.
l
M-REL - El
0
There is no voltage between ECU terminals M-REL and El.
(IG S/W ON)
1
'
3
Check that there is voltage between ECU terminal M-REL and
body ground. (IG S/W ON)
NO
OK
wiring between ECU terminal El and body
ground.
OK BAD
Try another ECU.
1
Replace or repair.
F
I
I I
BAD
c Replace.
Check EFI main relay and wiring
harness.