Toyota Supra 1990 Manual page 213

No.
4
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (7M-GEl
FI-39
Terminals
Trouble Condition
STO Voltage
No. 10
E01
No. 20
No voltage
Ignition switch ON
10 - 14 V
No. 30
E02
Ignition Switch
ECU
Fuse
,--------r~-~4_--------------~----------~Y'~--_nIGSW
AM2
IG2
AM230A
Fusible
Link
MAIN 2.0L
T
Battery
CD
No.l0
®
r---------------------~
FI3457
CD
CV
IGN 7.5A
Injector
L---~-----------0No.
10
L---------------~------__nNo.
20
L-----------------------------nNo.30
EOl
E02
FI3565
There is no voltage between ECU terminal No.1 0, No. 20 and/or
No. 30 and EOl and/or E02. (lG SW ON)
Check that there is voltage between ECU terminal No. 10, No. 20
or No. 30 and body ground.
NO
~
OK
Check wiring between ECU terminal EOl and/or E02
and body ground.
~
OK
~
BAD
Try another ECU.
Repair or replace.
Check fusible links and ignition BAD
Repair or replace.
switch.
OK
®
Check resistance of each injector.
STO resistance: Approx. 13.8
n
OK
i
BAD
Replace injector.
Check wiring between ECU terminal
BAD
No. 10, No. 20 and/or No. 30 and Repair or replace.
battery.