Pin

Wire Color

Meaning

Vss

Red

Speed sensor input

Ethanol

White

Ethanol sensor input

CAN H

Blue

CAN high

CAN L

Yellow

CAN low

RS232 Rx

Green

RS232 serial receive

RS232 Tx

Brown

RS232 serial transmit

TTL In-

Grey

TTL serial input (inverted)

TTL In+

Purple

TTL serial input (normal)

TTL Out

Black

TTL serial output

Ground

Black

Ground