Toyota Celica Supra 1986 Service And Repair Manual page 135

•
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
Fl-33
(j)
•
ecu
(i)
There is no vohage between ECU terminals + Band Et.
IIG S/W ONI
v
~
Check that there is voltage between ECU terminal + B and body
ground. UG S/W ONI
NO
I
OK
Check wiring between ECU terminal E1 and
body ground.
Voltmeter
I
BAD
Repair
Of
replace
v
I
BAD
· f
Rel)8ir or
repf~e
Check fuse and wirin.g harness.
_j
OK
Check NO. 1 main relay.
BAD
Replace
(j)
•
IG SIW- E1
ecu
(j)
There is no voltage between ECU terminals IG Stw and E1.
(IG
S/W ON)
v
® Check that there I$ vottage between ECU terminaiiG SNV and
body ground. UG SIW ON)
NO OK
Check wiring between ECU terminal E
1
and
body
ground.
ECU
BAD
Repai r
Or
replace
v •
Check f usible links and ignition
NO
switch.
Repair
Or
replace