Toyota 4-Runner 1985 Repair Manual page 210

No.
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
FI-41
Terminals
B/K -
E1
'"T'
I
I
Battery
I
-L
I
Trouble
No voltage
Fusible Link
Stop Light Switch
ECU
Ol~----------~
o
ECU
0101+-----
o
ECU
Fuse STOP
(15A)
CD
~
FI0614
FI0615
FI0552
Condition
STD Voltage
Stop light switch ON 8 - 14 V
Stop Light Switch
~~-------------0B/K
ECU
E,,,Not ST.
V,
NSW~
FI0605
No voltage between ECU terminals B/K and E
1 •
Check that there is voltage between ECU terminal B/K and
body ground when the brake pedal is depressed.
NO OK
@
Check wiring between ECU El and body
ground.
OK
BAD
Try another ECU.
I
Repair or replace
Check STOP fuse
(1 5A)
and stop
BAD
light switch.
Repair or replace
OK
Check wiring between ECU
BAD
terminal B/K and battery.
Repair or replace