Toyota Celica Supra 1986 Service And Repair Manual page 137

EFI SYSTEM - Troubleshooting f or EFI Electronic Circuit with Volt/Ohmmeter Fl-35
No. Tonninall Trouble
Concltlon
STD • " " -
IOL- E2
Throttle valve open
4 - 6
Ignition Throttle volvo fully d oatd
0.1 - 1.0
2 VTA - E>
No voltage
ewitch ON
11vottle v••
fuly
open
4 - 5
Ve - Ea
-
4 - 6
ECU
Throttle Position StnSOt'
\ E,
E,
.t. IDL
VTA
IOL
Vc
VTA
Vc
I
E,
~
.....
<D
•
tOl- Ez
<D
There is no volt&ge between ECU terminals IOL end Et.
(tO
SIW ON) tThrottle valve open)
v
<2>
Check that there Is voltage between ECU terminal • 8
body
and body ground. CIG S/W ONI
NO OK
Check wiring between ECU terminal E' 11\d
body
ground.
BAD
I
Repair or replace
I
v
Refer to No. 1.
BAD
I
Repair or replace
O K
...
,
Ohmmttll'
Q}
00
(3)
CMck ttvottle
po~ition
MnSOI.
BAD
BAD OK
Repelr or replace
Cheek
wiring
betw"" ECU and
thtottle position s.ensor
throttle position sensor.
OK
· -
J
Try enotMr ECU.