Toyota Celica Supra 1986 Service And Repair Manual page 138

I
Fl-36
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter
•
VTA-
&
ECU
(j)
There is no spec.ified voltage at ECU termin&ls VTA and
E:t.
IIG 5/W ON)
v
@
Check that there is voltage between ECU terminal
+B
and body ground. IIG SIW ONI
NO
OK .....
Check
w i~ing
between ECU terminal E1 and body
ground.
BAD
Re~ir or replace
v
Refer to No.
1.
BAD
Repair o r reJ)Iace
I
OK
.....
<3>
Check throttle position sensor.
I
BAD
I
Repair
01
replace
, n·:
=··!fl
0
dol-..
·-
OK
Check wiring between
ECU and
BAD
throttle position sGnsor.
Repair or replace
OK
Try another ECU.
•
Vc- E:r
ECU
(D
There is no voltage between ECU terminals Vc and E2.
IIG SIW ONI
v
Che<:k that there is voltage between ECU terminal
+
8
and body ground. UG SJW ON)
OK
NO
"''"
Q)
Check throttle p.osith>n
Refer to No.
1.
sensor.
BAO
OK
Repair or replace
Chec,k wiring between ECU and
throttle position sensor.
OK BAO
Try anothtr ECU.
Repair or replace
wiring.
FIOM1