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

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