MazdaRX7 S78

 

 

Pin

ECU Pin

Function

Pin

ECU Pin

Function

A

nc

 

4A

+14V (Main Relay)

ECU Power

B

nc

 

4B

nc (constant +12V)

 

C

Aux 2

ISC Solenoid

4C

DI 6

Start Signal

D

nc

 

4D

nc

 

E

nc

 

4E

+14V (Main Relay)

ECU Power

F

nc

 

4F

Injector 5 (Aux)

Fuel Pump Speed Relay

G

nc

 

4G

Injector 6 (Aux)

Fuel Pump Relay

H

Injector 7 (Aux)

Air Con Fan

4H

nc

 

I

nc

 

4I

Ignition 4 (Aux)

Air Con Clutch

K

nc

 

4K

Aux 3

Engine Fan

L

Ground

 

4L

Injector 8 (Aux)

Engine Fan (High Speed)

M

nc

 

4M

Aux 4

Tacho

O

Aux 1

Boost Solenoid

4O

nc

 

Q

Injector 1

Front Primary Injector

4P

nc

 

S

Aux 7

Metering Oil Pump (Rotary Oil Pump)

4Q

DI 3

Vehicle Speed

U

Injector 2

Rear Primary Injector

4R

nc

 

W

Aux 6

Metering Oil Pump (Rotary Oil Pump)

4S

DI 4

Clutch Switch (Some models)

X

Ground

 

4U

nc

 

Y

Injection 3

Front Secondary Injector

4V

DI 1

A/C Request

AA

Aux 8

Metering Oil Pump (Rotary Oil Pump)

4W

DI 2

PS Switch

AB

Ground

 

4Y

nc

 

AC

Injector 4

 

4AA

nc

 

AD

nc

 

4AB

nc

 

AE

Aux 5

 

4AC

nc

 

AF

Ground

 

4AE

nc

 

AH

nc

 

4AF

Ignition 3

Ignition (Trailing Front)

AJ

Ground

Rear Secondary Injector

4AG

DI 5

A/C Switch

 

4AH

An Volt 4

MAP Signal

3A

+5V Out

Metering Oil Pump (Rotary Oil Pump)

4AI

nc

 

3B

nc

 

4AJ

Ignition 2

Ignition (Trailing Rear)

3C

nc

 

4AK

nc

 

3D

An Volt 1

Oxygen Sensor Signal

4AL

nc

 

3E

nc

 

4AM

nc

 

3F

nc

 

4AN

Ignition 1

Ignition (leading)

3G

nc

 

Expansion 1

Ground (Signal)

 

3H

An Volt 3

Metering Oil Pump Position Signal

Expansion 2

+5V Out

 

3I

An Volt 2

TPS Signal

Expansion 3

DI 8

 

3K

nc

 

Expansion 4

DI 7

 

3M

nc

 

Expansion 5

An Volt 5

 

3O

Knock 1

Knock

Expansion 6

An Volt 6

 

3Q

nc

 

Expansion 7

An Volt 7

 

3R

Trig 1

Trig 1

Expansion 8

An Temp 4

 

3S

Ground (CAS)

 

Expansion 9

Ignition 8

 

3T

An Temp 3

IAT

Expansion 10

Ignition 7

 

3U

Trig 2

Trig 2

Expansion 11

Ignition 6

 

3V

An Temp 1

Fuel Temp

Expansion 12

Ignition 5

 

3W

An Temp 2

ECT

Expansion 13

An Volt 9

 

3X

nc

 

Expansion 14

An Volt 8

 

3Z

nc

 

Expansion 15

DI 10

 

3AB

Ground (Signal)

 

Expansion 16

DI 9