GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module (ECM)

Engine Control Module (ECM)


Object Number: 1509186  Size: CF

Connector Part Information

  • OEM: FC1
  • Service: N/A
  • Description: 90-Way F (BK)

Engine Control Module (ECM)

Pin

Wire

Circuit

Function

1

BN

1158

Ignition Coil 3 Control

2

--

--

Not Used

3

BK

750

Ground

4

D-GN/WH

428

EVAP Canister Purge Valve Solenoid Control

5

D-BU

473

High Speed Cooling Fan Control

6

WH

257

Exhaust Gas Recirculation (EGR) Valve Control

7

OG/BK

1029

Main Relay Control

8

WH

121

Tachometer Signal

9

--

--

Not Used

10

D-GN/WH

465

Fuel Pump Relay Control

11

--

--

Not Used

12

GY/BK

720

Low Reference

13

D-GN/PK

412

Oxygen (O2) Sensor Signal

14

GY/YE

596

Fuel Sender Signal

15

BN/D-BU

718

Low Reference

16

PU/D-GN

1980

Heated Oxygen Sensor (HO2S) 2 Signal

17

--

--

Not Used

18

PK/BK

632

Low Reference

19

BK/WH

951

Knock Sensor (KS) Shield Ground

20

--

--

Not Used

21

BN/D-GN

437

Vehicle Speed Signal

22

--

--

Not Used

23

D-GN/WH

762

A/C Request Signal

24

YE/BK

1868

Crankshaft Position (CKP) Sensor Signal HIGH

25

OG/BK

495

Power Steering Pressure Switch Signal

26

--

--

Not Used

27

WH

2148

Transmission Control Module (TCM) (Automatic Transmission)

28

BK

750

Ground

29

PK/RD

339

Ignition Voltage

30

RD/BK

1240

Battery Positive Voltage

31

L-BU

1153

Ignition Coil 1 Control

32

PK

1155

Ignition Coil 2 Control

33

BK

750

Ground

34

--

--

Not Used

35

D-GN

676

Heated Oxygen Sensor (HO2S) Heater Control

36

D-GN/WH

135

Temperature Signal

37

--

--

Not Used

38

D-GN/WH

459

A/C Compressor Relay Control

39

D-GN

335

Cooling Fan Relay LOW Control

40-41

--

--

Not Used

42

L-GN/BK

444

Idle Air Control (IAC) Coil B Low Control

43

BN

1456

Exhaust Gas Recirculation (EGR) Valve Position Signal

44

D-BU

417

Throttle Position (TP) Sensor Signal

45

YE

410

Engine Coolant Temperature (ECT) Sensor Signal

46

D-BU

732

Evaporative Temperature Sensor Signal

47

BN

472

Intake Air Temperature (IAT) Sensor Signal

48

YE

2643

Octane Selection Connector Signal (With Octane Switch)

BK

750

Ground (w/o Octane Switch)

49

D-GN/YE

2642

Octane Selection Connector Signal

50

YE/BK

457

Knock Sensor (KS) Signal

51-52

--

--

Not Used

53

BK/WH

1451

Crankshaft Position (CKP) Sensor Shield Ground

54

D-BU/WH

1869

Crankshaft Position (CKP) Sensor Signal LOW

55

D-GN

872

Rough Road Sensor

56

PU

1319

Serial Data

57

GY/BK

2149

Transmission Control Module (TCM) (Automatic Transmission)

58

L-BU/BK

1745

Fuel Injector 2 Control

59-62

--

--

Not Used

63

BK

750

Ground

64

PU

30

Fuel Gage Sensor Signal

65

D-BU/WH

1677

Heated Oxygen Sensor (HO2S) 1 Signal

66

OG/BK

1733

Ignition 1 Voltage

67

BK

750

Ground

68

BN/WH

419

Malfunction Indicator Lamp (MIL) Control

69

--

--

Not Used

70

L-BU

1748

Idle Air Control (IAC) Coil A Low Control

71

L-BU/WH

1747

Idle Air Control (IAC) Coil A High Control

72

L-GN/WH

1749

Idle Air Control (IAC) Coil B High Control

73

L-GN

432

Manifold Absolute Pressure (MAP) Sensor Signal

74

GY

416

5-Volt Reference

75

BN

808

Low Reference

76

GY/D-BU

1981

Heated Oxygen Sensor (HO2S) 2 Low Reference

77

BN

413

Low Reference

78

GY

474

5-Volt Reference

79

PU

719

Low Reference

80

D-BU

496

Knock Sensor Signal

81

--

--

Not Used

82

BN/WH

633

Camshaft Position (CMP) Sensor Signal

83

GY

2702

5-Volt Reference

84

BN/WH

312

Headlamp Signal

85

BN

833

Rough Road Sensor

86-88

--

--

Not Used

89

PK/BK

1746

Fuel Injector 3 Control

90

BN

1744

Fuel Injector 1 Control