Toyota Supra 1990 Manual page 206

FI-32
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (7M-GE)
Voltage at ECU Wiring Connectors
No. Terminals
Condition
STD Voltage
See Page
BATT
-
E1
-
10 - 14
FI-33
IGSW
-
E1
1
FI-34
M-REL
-
E1 Ignition SW ON
10 - 14
+B(+B1)
-
E1
FI-35
IDL
-
E2
Throttle valve open
10 - 14 FI-36
VC
-
E2
-
4-6
2
Ignition SW ON
Throttle valve fully closed
0.1 - 1.0
F 1-37
VTA - E2
Throttle valve fully open
4-5
VC - E2
-
4-6
Ignition SW ON
Measuring plate fully closed 3.7 - 4.3
3
Measuring plate fully open 0.2 - 0.5
FI-38
VS - E2
Idling 2.3 - 2.8
3,000 rpm 1.0 - 2.0
No.10 E01
4 No. 20
-
Ignition SW ON
10 - 14
FI-39
No. 30 E02
5 THA
-
E2 Ignition SW ON
I ntake air temperature
20°
C
(68°
F)
1 - 3 FI-40
6
THW
-
E2 Ignition SW ON
Coolant temperature 80°C (176°F) 0.1 - 1.0 F 1-41
7 STA
-
E1 Cranking
6 -14 FI-42
8 IGT
-
E1
Idling
0.7 - 1.0 FI-43
ISC1
9 I - E1
Ignition SW ON 9 - 14 FI-44
ISC4
10 W E1
No trouble ("CHECK ENGINE" warning light off) and
8 -14
FI-45
-
engine running
11
AIC -
E1 Air conditioning ON
10 - 14 FI-46
ECU Terminals
I
L......I
I I
L-....J
I
-=-
E01
No.
STA STJ
NSYI ISC ISC
G8 G1 G2 NE IGT IGF trHVI
OX1
VSV M-
EGR SPD FP THA VS VC
IG
10
J~r
1 2
-
REL
BATT
SW
N C
1
E02
No. No. E1
HT
ISC ISC VF1 TE1 VT.Il IDL [rHG
OX2
KNt<
E2 L1 L2 L3
A/C
W IoFG ECT LP E11 +8 +81
20 30
3
4
FI0574