GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module (ECM) C1
Connector 2: Engine Control Module (ECM) C2
Connector 3: Engine Control Module (ECM) C3

Engine Control Module (ECM) C1


Object Number: 1228485  Size: CH

Connector Part Information

  • OEM: 13510837
  • Service: N/A
  • Description: 56-Way F Micro-Pack 64 Series (BK)

Engine Control Module (ECM) C1

Pin

Wire

Circuit

Function

1-6

--

--

Not Used

7

WH

17

Brake Pedal Feed

8

--

--

Not Used

9

BK

452

Low Reference

10-11

--

--

Not Used

12

BN/WH

419

Malfunction Indicator Lamp

13

D-GN/WH

465

Fuel Pump Relay

14-17

--

--

Not Used

18

YE/BK

5278

ECM/TCM Serial Data Wake-Up

19

PK

239

Ignition Voltage

20

RD/WH

1440

Battery Positive Voltage

21-32

--

--

Not Used

33

WH/BK

1164

5-Volt Feed

34

GY

596

5-Volt Feed

35

TN

1274

5-Volt Feed

36

BN

1271

Low Reference

37

PU

1272

Low Reference

38

--

--

Not Used

39

BN

818

Vehicle Speed Signal

40

BN

5069

Engine Relay

41-43

--

--

Not Used

44

D-BU

1936

Fuel Tank Oil Level Sensor 1

45

L-BU

1937

Fuel Tank Oil Level Sensor 2

46

--

--

Not Used

47

D-BU

1161

APP Sensor 1

48

D-GN

890

Fuel Tank Pressure Signal

49

L-BU

1162

APP Sensor 2

50-52

--

--

Not Used

53

D-GN/WH

459

A/C Clutch Control

54

D-BU

473

Fan Control 2

55

WH

1310

Fuel Tank Emission

56

YE

447

Active Control

Engine Control Module (ECM) C2


Object Number: 1420560  Size: CH

Connector Part Information

  • OEM: 15499466
  • Service: N/A
  • Description: 73-Way F 108-A (BK)

Engine Control Module (ECM) C2

Pin

Wire

Circuit

Function

1

PU

2121

Ignition Coil 1

2

TN/WH

3111

Oxygen Sensor A Low

3

PU/WH

3110

Oxygen Sensor A High

4

PU

3120

Oxygen Sensor C High

5

TN

3121

Oxygen Sensor C Low

6

L-BU

1876

Knock Sensor Bank 2

7

GY

2303

KS Low Reference Bank 2

8

D-BU

496

Knock Sensor Bank 1

9

GY

1716

KS Low Reference Bank 1

10

--

--

Not Used

11

YE

581

Throttle Motor Positive Rotate

12

BN

582

Throttle Motor Negative Rotate

13

PK/BK

5290

Engine Relay Control

14

PK/BK

6395

Camshaft Phasing Control 2

15

TN/BK

6397

Camshaft Phasing Control 4

16

D-BU/WH

878

Fuel Injector 8 Control

17

OG/WH

2122

Ignition Coil 2

18

L-BU/WH

2126

Ignition Coil 6

19

BN/WH

2130

Low Reference 2

20

PU

6267

Low Reference

21

TN

6268

Low Reference

22

WH

6269

Low Reference

23

BN

6266

Low Reference

24

BK

2755

Low Reference

25-26

--

--

Not Used

27

GY/BK

6272

Low Reference

28

PK/BK

5290

Engine Relay Control

29

TN

2752

Low Reference

30

BN/WH

6754

Camshaft Position Phasing Control 3 Low Reference

31

BU/WH

6756

Camshaft Phasing Control 1 Low Reference

32

L-BU/BK

1746

Fuel Injector 3 Control

33

OG

2127

Ignition Coil 7

34

D-GN

2125

Ignition Coil 5

35

BN

2129

Low Reference (1)

36

D-GN

6457

5-Volt Feed

37

OG

6260

5-Volt Feed

38

PK

6261

5-Volt Feed

39

D-BU

6259

5-Volt Feed

40

GY

2705

5-Volt Feed

41

--

--

Not Used

42

BK

2760

Low Reference

43

PU/WH

6270

5-Volt Feed

44

GY

2701

Feed

45

--

--

Not Used

46

BN

6753

Camshaft Position Phasing Control 2 Low Reference

47

D-BU

6755

Camshaft Position Phasing Control 4 Low Reference

48

L-BN/BK

1745

Fuel injector 2 Control

49

TN/WH

845

Fuel injector 5 Control

50

WH/BK

6396

Camshaft Position Phasing Control 3

51

GY/BK

6394

Camshaft Position Phasing Control 1

52

L-BU/BK

844

Fuel Injector 4 Control

53

L-BU

2123

Ignition Coil 3

54

D-GN/WH

2124

Ignition Coil 4

55

PU/WH

2128

Ignition Coil 8

56

D-GN/WH

6264

Camshaft Position Sensor X

57

OG/BK

6263

Camshaft Position Sensor Y

58

PK/BK

6262

Camshaft Position Sensor Z

59

D-BU/WH

6265

Camshaft Position Sensor W

60

TN/WH

331

Engine Oil Pressure Signal

61

--

--

Not Used

62

TN

472

IAT Signal

63

WH/BK

6271

Crankshaft Position Sensor

64

D-GN

485

Throttle Position Sensor

65

--

--

Not Used

66

PU

486

TP Sensor 2

67

YE

492

Air Quality Signal

68

GY/WH

3113

Oxygen Sensor A Heat

69

BK/WH

3122

Oxygen Sensor C Heat

70

YE/BK

846

Fuel Injector 6 Control

71

OG/BK

877

Fuel Injector 7 Control

72

TN

1744

Fuel Injector 1 Control

73

BK/WH

1551

Ground

Engine Control Module (ECM) C3


Object Number: 1420560  Size: CH

Connector Part Information

  • OEM: 15497996
  • Service: N/A
  • Description: 73-Way F 105-B (BK)

Engine Control Module (ECM) C3

Pin

Wire

Circuit

Function

1-2

--

--

Not Used

3

TN/WH

3211

Oxygen Sensor B Low

4

PU/WH

3210

Oxygen Sensor B High

5

PU

3220

Oxygen Sensor D High

6

TN

3221

Oxygen Sensor D High

7

OG

225

Alternator Output-Regulator Reference Voltage

8-14

--

--

Not Used

15

L-GN

3212

Oxygen Sensor B Heat

16-20

--

--

Not Used

21

BK/WH

452

Low Reference

22

--

--

Not Used

23

OG/BK

469

Low Reference

24-28

--

--

Not Used

29

GY

23

Alternator Field Duty Cycle Signal

30-32

--

--

Not Used

33

TN

2501

Low Speed GMLAN Serial Data (1) (T43)

34

--

--

Not Used

35

TN

2761

Low Reference

36

--

--

Not Used

37

GY

596

Feed

38

--

--

Not Used

39

GY

2704

Feed

40-45

--

--

Not Used

46

OG/BK

1786

Clutch Activate

47

--

--

Not Used

48

D-GN/WH

428

Evaporative Emission Canister Purge Solenoid Valve

49

D-GN

335

Fan Control (1)

50

OG/WH

3223

Oxygen Sensor D Heat

51-52

--

--

Not Used

53

TN/BK

2500

High Speed GMLAN Serial Data (1) (T43)

54

--

--

Not Used

55

YE

410

ECT Signal

56

--

--

Not Used

57

OG/BK

380

A/C Pressure Sensor

58

--

--

Not Used

59

L-GN

432

Intake Manifold Pressure Sensor

60-72

--

--

Not Used

73

BK/WH

1551

Ground