GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module (ECM) C1
Connector 2: Engine Control Module (ECM) C2

Engine Control Module (ECM) C1


Object Number: 1650395  Size: CH

Connector Part Information

  • OEM: 15499466
  • Service: 88988736
  • Description: 73-Way F 0.64 2.8 Sealed (BK)

Terminal Part Information

  • Pins: 47Terminal/Tray: 12110844/DELPHI 4
  • Core/Insulation Crimp: C/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

Terminal Part Information

  • Pins: 1, 9-13, 16-20, 23, 24, 26-34, 36-38, 41, 42, 45, 48-50, 52, 54, 56, 58-65, 68, 69, 71-73Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

OG/BK

1786

Park/Neutral Signal (M15)

2-8

--

--

Not Used

9

WH

17

Stop Lamp Supply Voltage

10

PU

3120

HO2S High Signal (Bank 1 Sensor 2)

11

TN/WH

3121

HO2S Low Signal (Bank 1 Sensor 2)

12

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

13

TN

5514

Low Reference

14-15

--

--

Not Used

16

PU

1589

Fuel Level Sensor Signal [- Primary]

17

D-BU

473

High Speed Cooling Fan Relay Control

18

BN

4

Accessory Voltage

19

PK

639

Ignition 1 Voltage

20

RD/WH

540

Battery Positive Voltage

21-22

--

--

Not Used

23

PU

1272

Low Reference

24

D-GN

890

Fuel Tank Pressure Sensor Signal

25

--

--

Not Used

26

D-BU

6306

CPP Switch Signal (MU9)

27

TN

2501

High Speed GMLAN Serial Data Bus-

28

TN/BK

2500

High Speed GMLAN Serial Data Bus+

29

D-BU

1161

APP Sensor 1 Signal

30

BN

1271

Low Reference

31

OG/BK

1057

Low Reference

32

L-BU

1162

APP Sensor 2 Signal

33

GY

705

5-Volt Reference 1

34

GY

2700

5-Volt Reference 1

35

--

--

Not Used

36

TN

1274

5-Volt Reference 1

37

TN

472

IAT Sensor Signal

38

OG

2760

Low Reference

39-40

--

--

Not Used

41

YE

492

MAF Sensor Signal

42

D-GN/WH

6294

Low Reference (MU9)

43-44

--

--

Not Used

45

YE/BK

6806

IMT Valve Signal

46

--

--

Not Used

47

PK/BK

5290

Ignition 1 Voltage

48

BN

818

Vehicle Speed Signal

49

TN

3221

HO2S Low Signal (Bank 2 Sensor 2)

50

D-GN/WH

465

Fuel Pump Relay Control [- Primary]

51

--

--

Not Used

52

PU/WH

6386

Starter Relay Coil Control

53

--

--

Not Used

54

D-GN

6293

5-Volt Reference 2 (MU9)

55

--

--

Not Used

56

WH/BK

1164

5-Volt Reference 2

57

--

--

Not Used

58

D-GN

335

Low Speed Cooling Fan Relay Control

59

BN

5069

Main Relay Coil Control

60

TN

2759

Low Reference

61

WH

1310

EVAP Canister Vent Solenoid Control

62

OG

6392

IMT Valve Control

63

D-GN/WH

459

A/C Compressor Clutch Relay Control

64

OG/WH

3223

HO2S Heater Low Control (Bank 2 Sensor 2)

65

GY/WH

3122

HO2S Heater Low Control [Bank 2 Sensor 1]

66-67

--

--

Not Used

68

BN/WH

419

MIL Control

69

PU

3220

HO2S High Signal (Bank 2 Sensor 2)

70

--

--

Not Used

71

YE

400

VSS High Signal (MU9)

72

PU

401

VSS Low Signal (MU9)

73

BK/WH

451

Ground

Engine Control Module (ECM) C2


Object Number: 1715238  Size: CH

Connector Part Information

  • OEM: 13511426
  • Service: 19115670
  • Description: 80-Way F Receptacle 0.64 2.8 Sealed (BK)

Terminal Part Information

  • Pins: 8, 24, 32, 33, 43, 53, 58, 61Terminal/Tray: 1248074/DELPHI 2
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094429/J-35616-14 (GN)

Terminal Part Information

  • Pins: 2, 3, 5, 6, 12, 13, 16-22, 26, 27, 29, 30, 34, 35, 37, 40, 41, 44, 50, 52, 56, 57, 59-61, 63-66, 68-72, 78Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

L-GN

1867

5-Volt Reference 2

3

GY

2701

5-Volt Reference 2

4

--

--

Not Used

5

BN

582

TAC Motor Control - 2

6

YE

581

TAC Motor Control - 1

7

--

--

Not Used

8

D-GN/WH

428

EVAP Canister Purge Solenoid Control

9-11

--

--

Not Used

12

GY/WH

3113

HO2S Heater Low Control [- Bank 1 Sensor 1]

13

L-GN

3212

HO2S Heater Low Signal (Bank 2 Sensor 1)

14-15

--

--

Not Used

16

BN

2198

Camshaft Position Actuator Solenoid High Control

17

L-GN

1745

Fuel Injector 2 Control

18

YE/BK

846

Fuel Injector 6 Control

19

TN/WH

845

Fuel Injector 5 Control

20

TN

1744

Fuel Injector 1 Control

21

YE

410

ECT Sensor Signal

22

TN

2761

Low Reference

23

--

--

Not Used

24

OG/BK

1175

Low Reference

25

--

--

Not Used

26

D-BU

496

KS 1 Signal

27

GY

1716

KS 1 Signal

28

--

--

Not Used

29

L-BU

1876

KS 2 Signal

30

GY

2303

KS 2 Signal

31

--

--

Not Used

32

GY

23

Generator Field Duty Cycle Signal

33

BN

1174

Oil Level Switch Signal

34

BK

2755

Low Reference

35

TN

2752

Low Reference

36

--

--

Not Used

37

L-BU/BK

844

Fuel Injector 4 Control

38-39

--

--

Not Used

40

PK

1746

Fuel Injector 3 Control

41

GY

2705

5-Volt Reference 1

42

--

--

Not Used

43

GY

2704

5-Volt Reference 1

44

OG/WH

812

5-Volt Reference 1

45-49

--

--

Not Used

50

TN/WH

331

Oil Pressure Sensor Signal

51

--

--

Not Used

52

TN

2199

Low Reference

53

OG/BK

469

Low Reference

54-55

--

--

Not Used

56

TN/WH

3111

HO2S Low Signal (Bank 1 Sensor 1)

57

PU/WH

3110

HO2S High Signal (Bank 1 Sensor 1)

58

L-GN

432

MAP Sensor Signal

59

PU/WH

3210

HO2S Reference Voltage (Bank 2 Sensor 1)

60

TN/WH

3211

HO2S Low Reference (Bank 2 Sensor 1)

61

OG

225

Generator Turn On Signal

62

--

--

Not Used

63

PU

486

TP Sensor 2 Signal

64

BN/WH

633

CMP Sensor Signal

65

D-GN

485

TP Sensor 1 Signal

66

PK/BK

632

Low Reference

67

--

--

Not Used

68

L-BU/BK

647

Medium Resolution Engine Speed Signal

69

PU

574

Low Reference

70

PU

2121

IC 1 Control

71

OG/WH

2122

IC 2 Control

72

L-BU

2123

IC 3 Control

73-77

--

--

Not Used

78

YE

2174

Low Reference

79-80

--

--

Not Used