USA MR2 AW11 NA
ECU Pin Identification
Provided by Richard White
4A-G Electronic Controlled Unit (ECU), 85~86’ AW11 MR2 US Market, Connector Shown.
Note: Toyota P/N 85’ (M/T) 89661-17020-84; 86’ (auto) 89661-17050-84; 87’ (M/T), 89661-17021; 87’ (auto) 89661-17051, 88~89’ 89661-17201
V Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
NSW |
B-W |
Neutral Start
Switch (86 MR2 A/T) |
|
2 |
VF |
R-W |
Check connector |
|
3 |
STA |
B |
Starter switch |
|
4 |
No. 10 |
L |
No. 3, 4 injector |
|
5 |
E01 |
BR |
Engine ground (Power) |
|
6 |
S/TH |
G-O |
Vacuum switching valve (VSV) |
|
7 |
E1 |
BR |
Engine ground |
|
8 |
IGT |
B-W |
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 |
B |
Throttle sensor |
|
7 |
T |
W |
Check connector |
|
8 |
W |
G-W |
Warning light (WAN) |
|
9 |
FPU |
G-B |
VSV (FPU) |
|
10 |
THW |
W |
Water temp.
sensor |
|
11 |
VTA |
R |
Throttle
sensor |
|
12 |
VCC |
Y |
Throttle
sensor |
|
13 |
OX |
B |
Oxygen sensor |
|
14 |
E2 |
BR |
Sensor Earth |
|
15 |
A/C |
B-W |
A/C Magnet
clutch |
|
16 |
TSW |
G-Y |
Water Temp
Switch |
|
17 |
|
|
|
|
18 |
VISC |
B |
Vacuum switching valve [Idle up](I-UP) |
T Connector
|
Pin No. |
Symbol |
Color |
Terminal |
|
1 |
+B1 |
B |
Main relay |
|
2 |
BaTT |
W-R |
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 |
(86’ MR2
A/T), ECT Computer |
|
7 |
L3 |
Y-R |
(86’ MR2
A/T), ECT Computer |
|
8 |
+B |
B-R |
Main relay |
|
9 |
|
|
|
|
10 |
SPD |
V-W |
Speedometer |
|
11 |
|
|
|
|
12 |
E21 |
B-R |
Sensor earth |
|
13 |
L2 |
Y-G |
(86’ MR2
A/T), ECT Computer |
|
14 |
ECT |
P-W |
(86’ MR2
A/T), ECT Computer (OD1) |
Source: Toyota Repair Manuals for MR2, 1985 and 1986