GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module (ECM) X1
Connector 2: Engine Control Module (ECM) X2

Engine Control Module (ECM) X1


Object Number: 1544242  Size: CH

Connector Part Information

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

Terminal Part Information

  • Pins: 1-3, 25-27, 49-51, 73-75
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 5-6, 9, 11-15, 17, 19-21, 23-24, 30, 33, 35-45, 47-48, 53, 56, 62-72, 76-79, 82-88, 90-96
  • 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) X1

Pin

Wire Color

Circuit No.

Function

1

1 OG

5421

Fuel Injector Supply Voltage 1

2

1 D-BU/WH

878

Fuel Injector 8

3

1 OG/BK

877

Fuel Injector 7 Control

4

--

--

Not Used

5

0.5 YE

492

MAF Sensor Signal

6

0.5 OG/BK

469

Low Reference

7-8

--

--

Not Used

9

0.5 BN

1174

Oil Level Switch Signal

10

--

--

Not Used

11

0.5 GY/BK

6272

Low Reference

12

0.5 GY

2704

5-Volt Reference 3

13

0.5 TN

5928

5-Volt Reference 3

14

0.5 GY

6054

5-Volt Reference 2

15

0.5 GY/WH

2705

5-Volt Reference 2

16

--

--

Not Used

17

0.5 GY

2701

5-Volt Reference 1

18

--

--

Not Used

19

0.5 L-GN

432

MAP Sensor Signal

20

0.5 YE

5947

Turbocharger Vane Position Sensor Signal

21

0.5 L-BU

1162

APP Sensor 2 Signal

22

--

--

Not Used

23

0.5 BK

2755

Low Reference

24

0.5 PU/WH

2530

Fuel Pressure Regulator Solenoid Supply Voltage

25

1 PK

5425

Fuel Injector Supply Voltage 4

26

1 YE/BK

846

Fuel Injector 6 Control

27

1 PK/BK

1746

Fuel Injector 3 Control

28

--

--

Not Used

29

--

--

Not Used

30

0.5 OG/BK

2919

Low Reference

31-32

--

--

Not Used

33

0.5 GY/BK

2931

Low Reference

34

--

--

Not Used

35

0.5 YE/BK

6055

Low Reference

36

0.5 TN

2752

Low Reference

37

0.5 GY

2702

5-Volt Reference 3

38

0.5 TN

1274

5-Volt Reference 2

39

0.5 TN

2917

5-Volt Reference 2

40

0.5 PU/WH

6270

5-Volt Reference 1

41

0.5 D-BU

6259

5-Volt Reference 1

42

0.5 TN

472

IAT Sensor Signal

43

0.5 D-BU

6053

DPF Sensor Signal

44

0.5 TN/WH

331

Oil Pressure Sensor Signal

45

0.5 L-GN

2032

ECT Sensor Signal

46

--

--

Not Used

47

0.5 TN

2761

Low Reference

48

0.5 D-BU

5930

Turbocharger Vane Position Control Solenoid Valve Control

49

1 PU

5423

Fuel Injector Supply Voltage 3

50

1 TN/WH

845

Fuel Injector 5 Control

51

1 L-BU/BK

844

Fuel Injector 4 Control

52

--

--

Not Used

53

0.5 YE/BK

6120

Low Reference

54-55

--

--

Not Used

56

0.5 D-BU/WH

6265

CMP Sensor Signal

57

0.5 GY/BK

1694

4WD Low Signal (NQG/NP2)

58-61

--

--

Not Used

62

0.5 TN

2760

Low Reference

63

0.5 OG/BK

5929

Low Reference

64

0.5 L-BU/BK

6813

Low Reference

65

0.5 L-BU

6118

Air Temperature Sensor Signal

66

0.35 PU/WH

7584

Not Used

67

0.5 BN/WH

5763

EGR Valve Sensor Signal

68

0.5 YE

410

ECT Sensor Signal

69

0.5 D-BU

5277

Exhaust Gas Temperature Sensor

70

0.5 BN

6782

Low Reference

71

0.5 YE/BK

625

Starter Enable Relay Control

72

0.5 YE

2834

Fuel Pressure Regulator Solenoid Control

73

1 YE

5422

Fuel Injector Supply Voltage 2

74

1 TN

1744

Fuel Injector 1 Control

75

1 L-GN/BK

1745

Fuel Injector 2 Control

76

0.5 PK

1339

Ignition 1 Voltage

77

0.5 RD/WH

440

Battery Positive Voltage

78

0.5 PU

1272

Low Reference

79

0.5 WH/BK

6271

CKP Sensor Signal

80-81

--

--

Not Used

82

0.5 TN/WH

1695

Axle Switch Signal (NQG/NP2)

83

0.5 L-BU/WH

6311

TCC Brake Signal

84

0.5 D-GN/WH

6142

Power Take Off Engine Shutdown Signal (PTO)

85

0.5 YE/BK

508

Water In Fuel Indicator Control

86

0.5 TN

2753

Low Reference

87

0.5 GY/BK

5765

Fuel Filter Pressure Switch Signal

88

0.5 BN

6266

Low Reference

89

--

--

Not Used

90

0.35 D-BU

7583

Not Used

91

0.5 D-GN

485

TP Sensor Signal

92

0.5 YE

2918

FRP Sensor Signal

93

0.5 L-BU

5377

Exhaust Gas Temperature Sensor

94

0.5 BN/WH

6783

Low Reference

95

0.35 BN

6274

Not Used

96

0.5 WH

5931

Low Reference

Engine Control Module (ECM) X2


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 (PU)
  • Pins: 7-8, 12-13, 15-16, 19-21, 27, 29-31, 33-34, 36, 38-39, 44-50, 52, 54, 56-57
  • 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) X2

Pin

Wire Color

Circuit No.

Function

1

2 PK

1439

Ignition 1 Voltage

2

2 BK/WH

451

Ground

3

2 PK

1439

Ignition 1 Voltage

4

2 BK/WH

451

Ground

5

2 PK

1439

Ignition 1 Voltage

6

2 BK/WH

451

Ground

7

0.8 BN

582

Motor Control - 2

8

0.8 BN

25

Charge Indicator Control

9-11

--

--

Not Used

12

0.5 D-GN/WH

465

Fuel Pump Relay Control

13

0.5 TN

5514

Low Reference (CJ2/C67)

14

--

--

Not Used

15

0.5 WH/BK

1164

5-Volt Reference 3

16

0.5 D-BU

507

Wait to Start Indicator Control

17-18

--

--

Not Used

19

0.5 YE

5991

Powertrain Relay Coil Control

20

0.8 YE

581

Motor Control - 1

21

0.5 PK

439

Ignition  1 Voltage

22-26

--

--

Not Used

27

0.5 GY

2700

5-Volt Reference 2 (CJ2/C67)

28

--

--

Not Used

29

0.5 BN

1271

Low Reference

30

0.5 BN/WH

419

MIL Control

31

0.5 D-GN/WH

459

A/C Compressor Clutch Relay Control (CJ2/C67)

32

--

--

Not Used

33

0.5 OG/BK

5764

Exhaust Gas Recirculation Valve Motor High Signal

34

0.5 TN/BK

6049

Low Reference

35

0.5 OG/BK

380

A/C Refrigerant Pressure Sensor Signal (CJ2/C67)

36

0.5 PU

1589

Fuel Level Sensor Signal

37

--

--

Not Used

38

0.8 GY

23

Generator Field Duty Cycle Signal

39

0.5 OG/BK

1786

Park/Neutral Signal

40-43

--

--

Not Used

44

0.5 TN

2501

High Speed GMLAN Serial Data Bus (-)

45

0.5 OG/BK

6399

VSS High Signal

46

0.5 L-GN/BK

5746

EGR Valve Motor Low Control

47

0.5 BN

6062

Low Reference

48

0.5 YE

1578

Fuel Temperature Sensor Signal

49

0.5 D-BU

1161

APP Sensor 1 Signal

50

0.5 L-BU/WH

1937

Secondary Fuel Level Sensor Signal

51

--

--

Not Used

52

0.35 WH

6275

Not Used

53

--

--

Not Used

54

0.5 YE/BK

1827

Vehicle Speed Signal

55

--

--

Not Used

56

0.5 D-BU

5985

Accessory Wakeup Serial Data

57

0.5 TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

58

--

--

Not Used