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: 89046933
  • Description: 96-Way F Mixed Series, Sealed (BK)

Terminal Part Information

  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Core/Insulation Crimp: P/P
  • 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

2

D-BU/WH

878

Fuel Injector 8 Control Group 4

3

OG/BK

877

Fuel Injector 7 Control Group 2

4-5

--

--

Not Used

6

OG/BK

469

Low Reference

7

PU

806

Crank Voltage

8

--

--

Not Used

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

--

--

Not Used

15

GY

2705

5-Volt Reference 2

16-17

--

--

Not Used

18

YE

492

MAF Sensor Signal

19

L-GN

432

MAP Sensor Signal

20

YE

5947

Turbocharger Vane Position Sensor Signal

21

L-BU

1162

APP Sensor 2 Signal

22

YE/BK

508

Water in Fuel Indicator Control

23

BK

2755

Low Reference

24

PU/WH

2530

Fuel Pressure Regulator Solenoid Supply Voltage

25

PK

5425

Injector Positive Voltage Control

26

YE/BK

846

Fuel Injector 6 Control Group 2

27

PK/BK

1746

Fuel Injector 3 Control Group 4

28-29

--

--

Not Used

30

OG/BK

2919

Low Reference

31-33

--

--

Not Used

34

D-BU

84

Cruise Control Set/Coast Switch Signal

35-36

--

--

Not Used

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

--

--

Not Used

44

TN/WH

331

Oil Pressure Sensor Signal

45-46

--

--

Not Used

47

TN

2761

Low Reference

48

D-BU

5930

Turbocharger Vane Position Control Solenoid Valve Control

49

PU

5423

Injector Positive Voltage Control

50

TN/WH

845

Fuel Injector 5 Control Group 3

51

L-BU/BK

844

Fuel Injector 4 Control Group 1

52

--

--

Not Used

53

YE/BK

6120

Low Reference

54

--

--

Not Used

55

TN

476

Low Reference

56

D-BU/WH

6265

CMP Sensor Signal

57

--

--

Not Used

58

L-GN

1478

Coolant Level Switch Signal

59

D-GN

534

High Idle Switch Signal

60

--

--

Not Used

61

GY

397

Cruise Control On Switch Signal

62

TN

552

Low Reference

63

OG/BK

5929

Low Reference

64

--

--

Not Used

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

69-71

--

--

Not Used

72

YE

2834

Fuel Pressure Regulator Solenoid Control

73

YE

5422

Injector Positive Voltage Control

74

TN

1744

Fuel Injector 1 Control Group 1

75

L-GN/BK

1745

Fuel Injector 2 Control Group 3

76

RD/WH

840

Ignition 1 Voltage

77

RD/WH

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 (C60)

81-85

--

--

Not Used

86

TN

2753

Low Reference

87

--

--

Not Used

88

BN

6266

Low Reference

89-91

--

--

Not Used

92

YE

2918

FRP Sensor Signal

93-95

--

--

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: C/5
  • Release Tool/Test Probe: J-38125-561/J-35616- 4A (PU)
  • Pins: 9, 12, 15-17, 19, 21-25, 29, 30-34, 36, 38-41, 44-49, 54, 56, 57
  • Terminal/Tray: 1928498135/19
  • Core/Insulation Crimp: Pins 9, 12, 15-17, 19, 22, 25, 29-34, 36, 39-41, 44-49, 54, 56, 57 - P/P
  • Core/Insulation Crimp: Pins 21-24, 38 - See Terminal Repair Kit
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) - C2

Pin

Wire Color

Circuit No.

Function

1

RD/WH

740

Ignition 1 Voltage

2

BK/WH

1551

Ground

3

RD/WH

740

Ignition 1 Voltage

4

BK/WH

1551

Ground

5

RD/WH

740

Ignition 1 Voltage

6

BK/WH

1551

Ground

7-8

--

--

Not Used

9

D-GN

1049

Class 2 Serial Data

10-11

--

--

Not Used

12

TN

1465

Fuel Pump Relay Control

13-14

--

--

Not Used

15

WH/BK

1164

5-Volt Reference 3

16

D-BU

507

Wait to Start Indicator Control

17

OG

2013

High Idle Indicator Control

18

--

--

Not Used

19

YE

5991

ECM Relay Control

20

--

--

Not Used

21

PK

439

Ignition 1 Voltage

22

PU

420

TCC Brake Switch/Cruise Control Release Signal

23

OG

225

Generator Turn On Signal

24

BN/WH

7076

Charge Indicator Control (KD9/YF2)

25

D-GN

603

A/C Low Pressure Switch Signal (C60)

26-28

--

--

Not Used

29

BN

1271

Low Reference

30

BN/WH

419

MIL Control

31

D-GN/WH

459

A/C Compressor Clutch Relay Control

32

YE/BK

625

Starter Enable Relay Control

33

OG/BK

5764

EGR Motor High Control

34

TN

2759

Low Reference

35

--

--

Not Used

36

PU

1589

Fuel Level Sensor Signal

37

--

--

Not Used

38

GY

23

Generator Field Duty Cycle Signal

39

OG/BK

1786

Park/Neutral Signal

40

L-BU

1320

Stop Lamp Switch Signal (Cutaway) or CHMSL Supply Voltage/Stop Lamp Supply Voltage

41

D-BU

6863

Low Reference

42-43

--

--

Not Used

44

TN

2501

High Speed GMLAN Serial Data Bus (-)

45

L-BU

2221

Signal High - Rear

46

L-GN/BK

5746

EGR Motor Low Control

47

BN

6062

Low Reference

48

YE

1578

Fuel Temperature Sensor Signal

49

D-BU

1161

APP Sensor 1 Signal

50-53

--

--

Not Used

54

YE/BK

1827

Vehicle Speed Signal

55

--

--

Not Used

56

PK

1020

Ignition 0 Voltage

57

TN/BK

2500

High Speed GMLAN Serial Data Bus (+)

58

--

--

Not Used