Toyota Celica Supra 1986 Service And Repair Manual page 129

EFI SYSTEM - Diagnosis System A -27
INSPECTION OF DIAGNOSIS CIRCUIT
STOP
ECU
~use
SAT
EFI
No. 1 Main Relay
Fuse
c-~
-v
+8
M·REl
-:!:-
'
7
Fusible
@
1
Check Engine
Link
-
Warning Light
w
IW'Iition S/W
-t
IG S/W
1 B ~mery
.A
....L
.
r.J. T
1
I
E1
E,
O>cck
Coonccta<
~ -
-
·-
I.
Does CHECK ENG. warning light comft on when
ignition switch is at ON ?
YES System Normal
NO
Does CHECK ENG. light .come on when ECU
YES Check w iring between ECU
OK Tty another
terminel W is grounded to the body?
terminal E1 and body
ECU
ground
NO
I
BAD
Check bulb. tuse and w iring between ECU end
Repair or replace!
ignition switch.
I
BAD
!Repair or replaeeJ
2.
DOtts CHECK ENG. w arning light go OFF w hen
YES
System Normal
engine is started?
I
NO
Check wiring between ECU and CHECK ENG.
BAD
I
Repair
I
warning lighl .
joK
Is there diagnosis code output when service.
NO
I
Try onother ECUI
connector is short
circuited~
I
YES
Does CHECK ENG . warning tight go
ot~t
after
repair according to malfunction code1
NO
Further repair required
I
YES
!svstem
OKI
• lcarw:el
out Diagnostic coda
I