ME100 GEN1/ME221 GEN1 Pin-out & Wiring Diagram

The below picture illustrates the pin-out orientation. Note that the ECU is shown, so the number represent the ‘back’ of the wiring harness connectors, or ‘wire-side’.

The wire connectors are TE Parts, available from electronics suppliers such as RS or mouser.com:

The 12-Way Plug is TE Part Number 175965-2
The 16 Way Plug is TE Part Number 175966-2

The Crimps (28 needed) are TE Part Number 175265-1

PIN

Name / Function

Our Loom Colour (Base/Stripe)

1

Injector 4

GREEN/ORANGE

2

Low Side Output 3 (LS7 on ME100)*

BLUE/RED

3

Low Side Output 2 (LS6 on ME100)*

BLUE/BROWN

4

Injector 2 (LS5 on ME100)

GREEN/BROWN

5

Injector 1 (LS4 on ME100)

GREEN/BLACK

6

Low Side Output 1 (LS5 on ME100)*

BLUE/BLACK

7

Injector 3 (LS6 on ME100)

GREEN/RED

8

Tachometer Output (12V)

BROWN

9

GROUND

BLACK

10

Coil A / 1 (Cylinders 1 & 4)**

BLUE

11

GROUND

BLACK

12

Coil B / 2(Cylinders 2 & 3)**

GREEN

13

12V Ignition Switched Power (5A Fused)

RED

14

5V Reference Output

PURPLE

15

CAM Sensor +ve

WHITE in SHIELDED RED

PIN

Name / Function

Loom Colour (Base/Stripe)

16

CRANK Sensor -ve (leave unconnected for hall/opto)

BLUE in SHIELDED BLACK

17

HS_Digital_Input_2

RED/WHITE

18

Intake Air Temperature Signal (Pulled up via 2K7 Ohms)

ORANGE

19

Coolant Temperature Signal (Pulled up via 2K7 Ohms)

YELLOW

20

O2 Sensor Signal (0-5v, Narrow or Wideband)

RED/BLACK

21

Knock -ve

BLUE

22

CAM Sensor -ve (leave unconnected for hall/opto)

BLUE in SHIELDED RED

23

CRANK Sensor +ve

WHITE in SHIELDED BLACK

24

Knock +ve

White

25

Spare Analog 1 (0-5v)

RED/BLUE

26

MAP Sensor Signal

GREY

27

TPS Sensor Signal

PINK

28

Analog/Sensor Ground

BLACK


*be sure to install flyback diodes if needed on LS lines.


**Please note DO NOT USE resistor-less or low resistance plugs/leads. These can damage both coils as well as ignition channels.