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90 - 93 Integra TCU Pinouts

"A" Connector
8
Grn/Red

Shift Position "R" Input

7
Grn

Shift Position
"P" & "N" Input

6
Grn/Blk

Shift Position "D" Input

5
Grn/Blu

Shift Position
"3" Input

N/C N/C 4
Grn/Yel

Shift Position "2" Input

3
Yel/Red

To ECU Pin B16 -
Vehicle Speed
Sensor

2
Brn/Blk

To A/T Speed Pulser

1
Wht/Red

Shift Lockout Control Module
 

(Not Needed)

18
Yellow

To ECU Pin B3-
A/C Relay Input

17
Blue

Igniter Input
from Distributor
 

16
Red/Wht

TW
Sensor
(Coolant Temp)

15
Grn/Wht

Brake SW Input

14
Yellow

S3 / S4 Switch

Ground for S3

13
Gray

To A/T Speed Pulser
 

12
Blue/Wht

To ECU Pin
B4-
+5V Reference

11
Red/Blue

To ECU Pin C7- 
Throttle Pos. Sensor

10
Red/Wht

To ECU Pin C9-
Atm. Pressure Input

9
Blue

Illumination Cancel
 

(Not Needed)

Notes:

Pin 1 prevents shifting unless foot is on brake pedal
Pins 2,13 to speed pulser on transmission (transmission speed)
Pin 3 is to speed sensor on car (vehicle speed)
Pin 14 S3 locks out 4th gear, S4 allows 4th gear (OD)
Pin 18 not used if no Air Conditioning on car

"B" Connector
5
Blk/Red

Power Ground

4
Blk/Yel

+12 VDC Power

3
Red

TC Lock-up Control Solenoid

N/C N/C 2
Blue

Shift Control Solenoid

1
Green

Shift Control
Solenoid

12
Brn/Blk

Power Ground

11
Blk/Yel

+12 VDC Power

10
Grn/Blk

TC Lock-up
Control Solenoid

9
Yel/Wht

Illumination
Cancel

(Not Needed)

8
N/C
7
Green

S3 Indicator
Light
 
 

6
Wht/Yel

Battery Input (+12V constant, 10A fuse)