Toyota Celica Supra 1986 Service And Repair Manual page 139

-
EFI SYSTEM - Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter Fl-37
No.
Tom~'""l
Trouble
Condition
STO Voitooe
Vc - E:r
-
4 - IIV
Va -
u
Ignition
-
' pl01o fuly ctoaod
4 - &V
S/WON
3
Va - h
No voh:age MoaaurinQ
pl01o
fuly
o-
0 .02 0 .08 v
Va - b
, .. "11
-
2 - 4V
Va - Et 3,000
rpm
-
0 .3 - 1.0 v
THA - Et
IG S/W ON
Intake
air
tlmpttMure 20°C (88°F)
1 - 2 v
Air Flow Meter ECU
+8
F
!P
Connector
L_
I
e,
I
Vs
Vc
I
1
THA
E,
-~
.10, ..
ECU
(i)
•
Vc- E2
(!) There is no vottag• betwHtt ECU terminats Vc end b.
IIG
S/W
ONI
v
<l>
Check that
t~re is volteoo
between ECU terminal + Band body
ground. UG S/W ONI
NO
OK
<3>
Check wiring betwnn ECU terminal E:r end body
Voltmeter
ground.
BAD
Repair
01
ropltct~
v
Refer to No. 1.
L
BAD
I
Repair or rt plect
I
OK
Check air flow meter.
BAD
Repair or rtpltct
OK
Check
wir~ between
BAD
Repair
Of
repte«
ECU end air flow meter.
n .
OK
Try another ECU .
.....