Toyota 4-Runner 1985 Repair Manual page 202

ECU
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
FI-33
FI0554
Ohmmeter
o
o
o
FI0607
FI0555
Ol~
o
FI0607
CD
There is no specified voltage at ECU terminals
VTA
and E
2 ·
(lG S/W ON)
@
Check that there is voltage between ECU terminal +Bl or +B
and body ground. (lG S/W ON)
NO
OK
Check wiring between ECU terminal El and body
ground.
, BAD
Replace or repair.
Repair or replace.
OK
BAD
Check throttle position sensor.
Repair or replace.
OK
Check wiring between ECU and
throttle position sensor.
OK
t
Try another ECU.
~_B_A_D_~ Repair or replace.
CD
There is no voltage between ECU terminals Vee and E
2 •
(lG S/W ON)
Check that there is voltage between ECU terminal +Bl or +B
and body ground. (lG S/W ON)
OK
BAD
Repair or replace.
Check wiring between ECU and throttle
Try another ECU.