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: 1650395  Size: CH

Connector Part Information

  • OEM: 13542537
  • Service: See Catalog
  • Description: 73-Way F Receptacle 0.64 2.8 Sealed (BK)

Terminal Part Information

  • Pins: 1, 9, 12-13, 16-20, 23-24, 27-34, 36, 48, 50, 52, 56, 58-61, 63-65, 68
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 10, 11,37- 38, 41, 47, 49, 69
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 10, 11, 47, 49, 69 - K/K
  • Core/Insulation Crimp: Pins 37-38, 41 - J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: 2/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

OG

1786

Park/Neutral Signal

2-8

--

--

Not Used

9

WH

17

Stop Lamp Supply Voltage

10

PU

3120

HO2S High Signal (Bank 1 Sensor 2)

11

TN/WH

3121

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

17

D-BU

473

High Speed Cooling Fan Relay Control

18

BN

4

Accessory Voltage

19

PK

639

Ignition 1 Voltage

20

RD/WH

540

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

OG/BK

1057

Low Reference

32

L-BU

1162

APP Sensor 2 Signal

33

GY

705

5-Volt Reference 1

34

GY

2700

5-Volt Reference 1

35

--

--

Not Used

36

TN

1274

5-Volt Reference 1

37

TN

472

IAT Sensor Signal

38

TN/BK

2760

Low Reference

39-40

--

--

Not Used

41

YE

492

MAF Sensor Signal

42-46

--

--

Not Used

47

PK/BK

5290

Ignition 1 Voltage

48

BN

818

Vehicle Speed Signal

49

TN

3221

HO2S Low Signal (Bank 2 Sensor 2)

50

D-GN/WH

465

Fuel Pump Relay Control

51

--

--

Not Used

52

PU/WH

6386

Starter Relay Coil Control

53-55

--

--

Not Used

56

WH/BK

1164

5-Volt Reference 2

57

--

--

Not Used

58

D-GN

335

Low Speed Cooling Fan Relay Control

59

BN

5069

Powertrain Relay Control

60

TN

2759

Low Reference

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

3220

HO2S High Signal (Bank 2 Sensor 2)

70-72

--

--

Not Used

73

BK/WH

451

Ground

Engine Control Module (ECM) C2


Object Number: 1715238  Size: CH

Connector Part Information

  • OEM: 13542562
  • Service: See Catalog
  • Description: 80-Way F Receptacle 0.64 2.8 Sealed (GY)

Terminal Part Information

  • Pins: 1, 14-15, 17, 24, 27, 29-31, 33-34, 43-44, 46-47, 50-51, 53-54, 63- 64, 66, 68-69
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins:2-3, 8, 12-13, 16, 21-22, 24, 32-35, 41, 43-44, 50, 52-53, 58, 61, 63-66, 68-72, 78
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 5-6, 17-20, 26-27, 29-30, 37, 40, 56-57, 59, 60
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 5-6, 56-57, 59-60 - K/K
  • Core/Insulation Crimp: Pins 17-20, 26-27, 29-30, 37, 40 - 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

--

--

Not Used

2

L-GN

1867

5-Volt Reference 2

3

GY

2701

5-Volt Reference 2

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

9-11

--

--

Not Used

12

GY/WH

3113

HO2S Heater Low Control (Bank 1 Sensor 1)

13

L-GN

3212

HO2S Heater Low Control (Bank 2 Sensor 1)

14-15

--

--

Not Used

16

BN

2198

Camshaft Position Actuator Solenoid High Control

17

L-GN/BK

1745

Fuel Injector 2 Control

18

YE/BK

846

Fuel Injector 6 Control

19

TN/WH

845

Fuel Injector 5 Control

20

TN

1744

Fuel Injector 1 Control

21

YE

410

ECT Sensor Signal

22

TN

2761

Low Reference

23

--

--

Not Used

24

OG/BK

1175

Low Reference

25

--

--

Not Used

26

D-BU

496

KS 1 Signal

27

GY

1716

KS 1 Signal

28

--

--

Not Used

29

L-BU

1876

KS 2 Signal

30

GY

2303

KS 2 Signal

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-BU/BK

844

Fuel Injector 4 Control

38-39

--

--

Not Used

40

PK/BK

1746

Fuel Injector 3 Control

41

GY

2705

5-Volt Reference 1

42

--

--

Not Used

43

GY

2704

5-Volt Reference 1

44

OG

812

5-Volt Reference 1

45-49

--

--

Not Used

50

TN/WH

331

Oil Pressure Sensor Signal

51

--

--

Not Used

52

TN

2199

Low Reference

53

OG/BK

469

Low Reference

54-55

--

--

Not Used

56

TN/WH

3111

HO2S Low Signal (Bank 1 Sensor 1)

57

PU/WH

3110

HO2S High Signal (Bank 1 Sensor 1)

58

L-GN

432

MAP Sensor Signal

59

PU/WH

3210

HO2S High Signal (Bank 2 Sensor 1)

60

TN/WH

3211

HO2S Low Signal (Bank 2 Sensor 1)

61

OG

225

Generator Turn On Signal

62

--

--

Not Used

63

PU

486

TP Sensor 2 Signal

64

BN/WH

633

CMP Sensor Signal

65

D-GN

485

TP Sensor 1 Signal

66

PK/BK

632

Low Reference

67

--

--

Not Used

68

L-BU/BK

647

Medium Resolution Engine Speed Signal

69

PU

574

Low Reference

70

PU

2121

IC 1 Control

71

OG/WH

2122

IC 2 Control

72

L-BU

2123

IC 3 Control

73-77

--

--

Not Used

78

YE

2174

Low Reference

79-80

--

--

Not Used