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: 1544242  Size: CH

Connector Part Information

  • OEM: 15438366
  • Service: 19149311
  • Description: 96-Way F Mixed Series, Sealed (BK)

Terminal Part Information

  • Pins: 1-3, 25-27, 48-51, 73-77, 96
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 4-15, 17, 19-21, 23-24, 28, 30-31, 33-45, 47, 56-67-70, 72, 78-80, 84-86, 88, 91-94
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

OG

5421

Injector Positive Voltage Control Group 1

2

D-BU/WH

878

Fuel Injector 8 Control

3

RD/BK

877

Fuel Injector 7 Control

4

D-BU

2364

Cooling Fan Speed Signal

5

YE

492

MAF Sensor Signal

6

OG/BK

469

Low Reference

7

PU

806

Crank Voltage

8

YE

2522

PTO Engage Signal

9

BN

1174

Oil Level Switch Signal

10

GY/BK

87

Cruise Control Resume/Accel Switch Signal

11

GY/BK

6272

Low Reference

12

GY

2704

5-Volt Reference 3

13

TN

5928

5-Volt Reference 3

14

BN/WH

6136

5-Volt Reference 2

15

GY

2705

5-Volt Reference 2

16

--

--

Not Used

17

GY

2701

5-Volt Reference 1

18

--

--

Not Used

19

L-GN

432

MAP Sensor Signal

20

YE

5947

Turbocharger Vane Position Sensor Signal

21

L-BU

1162

APP Sensor 2 Signal

22

--

--

Not Used

23

BK

2755

Low Reference

24

PU/WH

2530

Fuel Pressure Regulator Solenoid Supply Voltage

25

PK

5425

Injector Positive Voltage Control Group 4

26

YE/BK

846

Fuel Injector 6 Control

27

PK/BK

1746

Fuel Injector 3 Control

28

WH/BK

2366

Cooling Fan Clutch Control

29

--

--

Not Used

30

OG/BK

2919

Low Reference

31

L-BU

494

PTO Engine Kill Signal

32

--

--

Not Used

33

BK

476

Low Reference

34

D-BU

84

Cruise Control Set/Coast Switch Signal

35

YE/BK

6055

Low Reference

36

BK

2752

Low Reference

37

GY

2702

5-Volt Reference 3

38

TN

1274

5-Volt Reference 2

39

TN

2917

5-Volt Reference 2

40

PU/WH

6270

5-Volt Reference 1

41

D-BU

6259

5-Volt Reference 1

42

TN

472

IAT Sensor 1 Signal

43

D-BU/WH

6053

Exhaust Pressure Sensor Signal (1)

44

TN/WH

331

Oil Pressure Sensor Signal

45

L-GN

2032

Coolant Temperature Sensor Signal

46

--

--

Not Used

47

BK

2761

Low Reference

48

D-BU

5930

Turbocharger Vane Position Control Solenoid Valve Control

49

PU

5423

Injector Positive Voltage Control Group 3

50

BK/WH

845

Fuel Injector 5 Control

51

L-BU

844

Fuel Injector 4 Control

52

--

--

Not Used

53

YE/BK

6120

Low Reference

54-55

--

--

Not Used

56

D-BU/WH

6265

CMP Sensor Signal

57

GY/BK

1694

4WD Low Signal

58

L-GN

1478

Coolant Level Switch Signal

59

D-GN

534

High Idle Switch Signal

60

L-GN

488

PTO On Switch Signal

61

GY

397

Cruise Control On Switch Signal

62

BK

552

Low Reference

63

OG/BK

5929

Low Reference

64

GY

596

5-Volt Reference

65

L-BU

6118

IAT Sensor 2 Signal

66

--

--

Not Used

67

BN/WH

5763

EGR Valve Position Signal

68

YE

410

ECT Sensor Signal

69

D-BU

5277

Exhaust Gas Temperature Sensor (1)

70

BN

6782

Exhaust Gas Temperature Sensor (1) Low Reference

71

--

--

Not Used

72

YE

2834

Fuel Pressure Regulator Solenoid Control

73

YE

5422

Injector Positive Voltage Control Group 2

74

BK

1744

Fuel Injector 1 Control

75

L-GN/BK

1745

Fuel Injector 2 Control

76

PK

339

Ignition 1 Voltage

77

OG

440

Battery Positive Voltage

78

PU

1272

Low Reference

79

WH/BK

6271

CKP Sensor Signal

80

D-GN/WH

2523

A/C Request Signal

81-83

--

--

Not Used

84

L-GN

24

Backup Lamp Supply Voltage

85

YE/BK

508

Water In Fuel Indicator Control

86

BK

2753

Low Reference

87

--

--

Not Used

88

BN

6266

Low Reference

89-90

--

--

Not Used

91

D-GN

485

TP Sensor 1 Signal

92

YE

2918

FRP Sensor Signal

93

L-BU

5377

Exhaust Gas Temperature Sensor (2)

94

BN/WH

6783

Low Reference

95

--

--

Not Used

96

WH

5931

Low Reference

Engine Control Module (ECM) C2


Object Number: 1544260  Size: CH

Connector Part Information

  • OEM: 15462694
  • Service: 88988935
  • Description: 58-Way F Mixed Series, Sealed (BK)

Terminal Part Information

  • Pins: 1-6
  • Terminal/Tray: 1928498059/24
  • Core/Insulation Crimp: 2/5
  • Release Tool/Test Probe: J-38125-561/J-35616-35 (VT)
  • Pins: 33, 46
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 7, 9, 11-12, 15-26, 28-32, 33, 36, 38-40, 41, 44-45, 47-50, 53-57
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

PK

339

Ignition 1 Voltage

2

BK/WH

351

Ground

3

PK

339

Ignition 1 Voltage

4

BK/WH

351

Ground

5

PK

339

Ignition 1 Voltage

6

BK/WH

351

Ground

7

BN

582

TAC Motor Control - 2

8

--

--

Not Used

9

D-GN

1049

ECM Class 2 Serial Data

10

--

--

Not Used

11

BK/WH

1962

Exhaust Brake Solenoid Feed (K40)

12

D-GN/WH

465

Fuel Pump Relay Control - Primary

13-14

--

--

Not Used

15

WH/BK

1164

5-Volt Reference 3

16

D-BU

507

Wait to Start Indicator Control

17

RD

2013

High Idle Indicator Control

18

PU

2562

PTO Control

19

GY

2219

IGN B Relay Control

20

YE

581

TAC Motor Control - 1

21

PK

439

Ignition 1 Voltage

22

L-BU

1320

Stop Lamp Supply Voltage

23

BN

25

Charge Indicator Control

24

BN

2524

Generator 2 Turn On Signal (K65)

25

D-GN

603

A/C Low Pressure Switch Signal

26

BN/WH

6141

Low Reference

27

--

--

Not Used

28

GY

2365

5-Volt Reference 1

29

BN

1271

Low Reference

30

BN/WH

419

MIL Control

31

D-GN/WH

459

A/C Compressor Clutch Relay Control

32

YE

447

Starter Relay Coil Control

33

OG/BK

5764

EGR Motor High Control

34

BK

470

Low Reference

35

--

--

Not Used

36

PU

1589

Fuel Level Sensor Signal - Primary

37

--

--

Not Used

38

GY

23

Generator Field Duty Cycle Signal

39

OG/BK

1786

Park/Neutral Signal (Automatic Transmission)

40

PU

420

TCC Brake Switch/Cruise Control Release Signal

41

--

--

Not Used

42

D-GN/WH

817

Vehicle Speed Signal

43

--

--

Not Used

44

TN

6106

High Speed GMLAN Serial Data Bus-

45

L-BU/BK

2221

Signal High - Rear

46

L-GN/BK

5746

EGR Motor Low Control

47

BN

6062

Low Reference

48

YE

1578

Fuel Temperature Signal

49

D-BU

1161

APP Sensor 1 Signal

50

D-BU

1936

Fuel Level Sensor Signal - Secondary

51-52

--

--

Not Used

53

L-GN

2081

Engine Exhaust Brake Switch Control

54

YE/BK

1827

Vehicle Speed Signal

55

WH

121

Engine Speed Signal

56

PK

1020

Ignition 0 Voltage

57

TN/WH

6105

High Speed GMLAN Serial Data Bus+

58

--

--

Not Used