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: 1715237  Size: CH

Connector Part Information

  • OEM: 15499466
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 Sealed (BK)

Terminal Part Information

  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
  • Pins: 1, 12-13, 16-17, 23-24, 29-36, 50-52, 56-59, 63, 68, 70-71
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 2, 9-11, 18-20, 27-28, 37-38, 41, 47, 49, 61, 64-65, 69
  • Terminal/Tray: 33467-0005/23
  • 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/BK

1786

Park/Neutral Signal

2

GY/BK

1694

4WD Low Signal (NP8)

3-8

--

--

Not Used

9

L-BU/WH

6311

Brake Switch Signal

10

PU/WH

1668

HO2S High Signal - Bank 1 Sensor 2

11

TN/WH

1669

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/WH

473

High Speed Cooling Fan Relay Control

18

D-BU

5985

Accessory Wakeup Serial Data

19

PK

439

Ignition 1 Voltage

20

RD/WH

440

Battery Positive Voltage

21-22

--

--

Not Used

23

PU

1272

Low Reference

24

D-GN

890

Fuel Tank Pressure Sensor Signal

25-26

--

--

Not Used

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

TN/BK

6049

Low Reference

32

L-BU

1162

APP Sensor 2 Signal

33

GY

2709

5-Volt Reference

34

GY/WH

2700

5-Volt Reference

35

--

--

Not Used

36

TN

1274

5-Volt Reference

37

TN/BK

472

IAT Sensor Signal

38

TN

2760

Low Reference

39-40

--

--

Not Used

41

YE

492

MAF Sensor Signal

42-46

--

--

Not Used

47

PK/BK

1339

Ignition 1 Voltage

48

--

--

Not Used

49

TN

1671

HO2S Low Signal - Bank 2 Sensor 2

50

D-GN/WH

465

Fuel Pump Relay Control - Primary

51

TN

1465

Fuel Pump Relay Control - Secondary (Except NQZ)

52

YE/BK

625

Starter Enable Relay Control

53-55

--

--

Not Used

56

WH/BK

1164

5-Volt Reference

57

YE/BK

1827

Vehicle Speed Signal (JH6/JH7)

58

D-GN

335

Low Speed Cooling Fan Relay Control

59

YE

5991

Powertrain Relay Coil Control

60

--

--

Not Used

61

WH

1310

EVAP Canister Vent Solenoid Control

62

--

--

Not Used

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 1 Sensor 2

66-67

--

--

Not Used

68

BN/WH

419

MIL Control

69

PU

1670

HO2S High Signal - Bank 2 Sensor 2

70

--

--

Not Used

71

OG/BK

6399

Replicated TOS Signal

72

--

--

Not Used

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 (GY)

Terminal Part Information

  • Pins: 2-3, 16, 34-35, 41-53, 58, 63-69
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 5-14, 17-33, 37-40, 56-57, 59-61, 70-79
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 5-14, 17-22, 29-33, 37-40, 56-57, 59-61, 70-79: J/J
  • Core/Insulation Crimp: Pins 26-27: K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU/WH

6270

5-Volt Reference

3

GY

2701

5-Volt Reference

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

GY

5493

Cylinder 6 Shutoff Solenoid Control 3 (LY5/LMG/L76/LC9)

10

D-BU

5491

Cylinder 1 Shutoff Solenoid Control 1 (LY5/LMG/L76/LC9)

11

OG

5494

Cylinder 4 Shutoff Solenoid Control 2 (LY5/LMG/L76/LC9)

12

GY/WH

3113

HO2S Heater Low Control - Bank 1 Sensor 1

13

L-GN

3212

HO2S Heater Low Control - Bank 2 Sensor 1

14

L-GN/BK

5492

Cylinder 7 Shutoff Solenoid Control 4 (LY5/LMG/L76/LC9)

15

--

--

Not Used

16

PU

5284

Camshaft Actuator Solenoid Control (L76,L92,LY6)

17

D-BU/WH

878

Fuel Injector 8 Control

18

TN/WH

845

Fuel Injector 5 Control

19

YE/BK

846

Fuel Injector 6 Control

20

TN

1744

Fuel Injector 1 Control

21

YE

410

ECT Sensor Signal

22

TN

2761

Low Reference

23-25

--

--

Not Used

26

D-BU

496

Knock Sensor 1 Signal

27

GY

1716

Low Reference

28

--

--

Not Used

29

L-BU

1876

Knock Sensor 2 Signal

30

GY

2303

Low Reference

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-GN/BK

1745

Fuel Injector 2 Control

38

PK/BK

1746

Fuel Injector 3 Control

39

L-BU/BK

844

Fuel Injector 4 Control

40

OG/BK

877

Fuel Injector 7 Control

41

GY

2705

5-Volt Reference

42

--

--

Not Used

43

GY

2704

5-Volt Reference

44

D-BU

6259

5-Volt Reference

45-49

--

--

Not Used

50

TN/WH

331

Oil Pressure Sensor Signal

51

--

--

Not Used

52

TN

2199

Low Reference (L76, L92, LY6)

53

OG/BK

469

Low Reference

54-55

--

--

Not Used

56

TN

1664

HO2S Low Signal - Bank 1 Sensor 1

57

PU/WH

1665

HO2S High Signal - Bank 1 Sensor 1

58

L-GN

432

MAP Sensor Signal

59

PU

1666

HO2S High Signal - Bank 2 Sensor 1

60

TN

1667

HO2S Low Signal - Bank 2 Sensor 1

61

BN

25

Charge Indicator Control/Charge Indicator Signal

62

--

--

Not Used

63

PU

486

TP Sensor 2 Signal

64

D-BU/WH

6265

CMP Sensor Signal

65

D-GN

485

TP Sensor 1 Signal

66

BN

6266

Low Reference

67

--

--

Not Used

68

WH/BK

6271

CKP Sensor Signal

69

GY/BK

6272

Low Reference

70

PU

2121

IC 1 Control

71

PU/WH

2128

IC 8 Control

72

OG

2127

IC 7 Control

73

OG/WH

2122

IC 2 Control

74

L-BU/WH

2126

IC 6 Control

75

D-GN

2125

IC 5 Control

76

D-GN/WH

2124

IC 4 Control

77

L-BU

2123

IC 3 Control

78

BN

2129

Low Reference

79

BN/WH

2130

Low Reference

80

--

--

Not Used