ECU Terminal Diagram
USA AE92 16V 4A-GE
Submitted By Richard White
4A-GEL Electronic Control Unit (ECU), 87 Corolla AE92 GTS US Market, Connector Shown. Toyota P/N 89661-TBD V Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
NSW |
B-W |
Neutral Start Switch |
|
2 |
VF |
R-W |
Check connector |
|
3 |
ST (STA) |
B |
Neutral Start Switch (A/T) or Clutch Start Relay (M/T) |
|
4 |
No. 10 |
L |
No. 3, 4 injector |
|
5 |
E01 |
BR |
Engine ground (Power) |
|
6 |
S/TH |
G-R |
Vacuum switching valve (VSV) |
|
7 |
E1 |
BR |
Engine ground |
|
8 |
IGT |
B |
Igniter |
|
9 |
No. 20 |
Y |
No. 1, 2 injector |
|
10 |
E02 |
BR |
Engine ground (Power) |
U Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
NE |
W |
Engine revolution sensor |
|
2 |
|||
|
3 |
G+ |
B |
Engine revolution sensor |
|
4 |
G- |
W |
Engine revolution sensor |
|
5 |
IGF |
B-Y |
Igniter |
|
6 |
IDL |
L |
Throttle sensor |
|
7 |
T |
L-W |
Check connector |
|
8 |
WAN |
G-W |
Warning light |
|
9 |
FPU |
G-Y |
VSV (FPU) |
|
10 |
THW |
W |
Water temp. sensor |
|
11 |
VTA |
R |
Throttle sensor |
|
12 |
VCC |
Y |
Throttle sensor |
|
13 |
OX |
B |
Oxygen sensor |
|
14 |
E21 |
BR |
Sensor Earth |
|
15 |
A/C |
B-W |
A/C Magnet clutch |
|
16 |
TSW |
G-Y |
Water Temp. Switch |
|
17 |
|||
|
18 |
I-UP (VISC) |
B |
Vacuum switching valve [Idle up] |
T Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
+B1 |
B-R |
Main relay |
|
2 |
BaTT |
R-L |
Battery |
|
3 |
THA |
Y |
Inlet air temp. sensor |
|
4 |
VS |
Y-L |
Air flow meter |
|
5 |
VC |
L-R |
Air flow meter |
|
6 |
L1 |
Y-L |
ECT Computer |
|
7 |
L3 |
Y-R |
ECT Computer |
|
8 |
+B |
B-R |
Main relay |
|
9 |
|||
|
10 |
SPD |
V-W |
Speedometer |
|
11 |
|||
|
12 |
E2 |
BR |
Sensor earth |
|
13 |
L2 |
Y-G |
ECT Computer |
|
14 |
ECT |
P |
From Cruise Control & ECT Computer |
Source: Color codes derived from Toyota Corolla 84~92 Front Wheel Drive Hayes Auto Repair Manual Schematic 4A-GEL Electronic Control Unit (ECU), 88-89 Corolla AE92 GTS US Market, Connector Shown. Toyota P/N 89661-12390 V Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
|||
|
2 |
VF |
R-W |
Check connector |
|
3 |
STA |
R-B |
Neutral Start Switch (A/T) or Clutch Start Relay (M/T) |
|
4 |
No. 10 |
G-R |
No. 3, 4 injector |
|
5 |
E01 |
BR |
Engine ground (Power) |
|
6 |
S/TH |
G-R |
Vacuum switching valve (VSV) |
|
7 |
E1 |
BR |
Engine ground |
|
8 |
IGT |
B |
Igniter |
|
9 |
No. 20 |
G-Y |
No. 1, 2 injector |
|
10 |
E02 |
BR |
Engine ground (Power) |
U Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
NE |
B-R |
Engine revolution sensor (Igniter) |
|
2 |
THG |
R-G |
ECR Gas Temp. Sensor |
|
3 |
G+ |
W |
Engine revolution sensor |
|
4 |
G- |
B |
Engine revolution sensor |
|
5 |
IGF |
B-Y |
Igniter |
|
6 |
IDL |
L |
Throttle sensor |
|
7 |
TEST |
L-W |
Check connector |
|
8 |
W |
R |
Warning light |
|
9 |
FPU |
LG |
VSV (FPU) |
|
10 |
THW |
W |
Water temp. sensor |
|
11 |
VTA |
R |
Throttle sensor |
|
12 |
VCC |
Y |
Throttle sensor |
|
13 |
OX |
B |
Oxygen sensor |
|
14 |
E21 |
BR |
Sensor Earth |
|
15 |
A/C |
B-W |
A/C Magnet clutch |
|
16 |
|||
|
17 |
HT |
R-B |
Ox Sensor Heater |
|
18 |
VISC |
B |
Vacuum switching valve [Idle up] |
T Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
+B1 |
B-R |
Main relay |
|
2 |
BATT |
R-W |
Battery |
|
3 |
THA |
B |
Inlet air temp. sensor |
|
4 |
VS |
Y-L |
Air flow meter |
|
5 |
VC |
Y-B |
Air flow meter |
|
6 |
|||
|
7 |
|||
|
8 |
+B |
B-R |
Main relay |
|
9 |
|||
|
10 |
SPD |
V-W |
Speedometer |
|
11 |
STP |
G-W |
To Cruise Control Computer |
|
12 |
E2 |
BR |
Sensor earth |
|
13 |
|||
|
14 |
Source: Toyota Corolla 84~92 Front Wheel Drive Hayes Auto Repair Manual Schematic
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