GM Service Manual Online
For 1990-2009 cars only
Connector 1: ECM C1
Connector 2: ECM C2

ECM C1


Object Number: 1228485  Size: CH

Connector Part Information

  • OEM: 15471387
  • Service: See Catalog
  • Description: 56-Way F Micro 64 Sealed (BU)

Terminal Part Information

  • Pins: 1-4, 6, 8-18, 27, 29-31, 41, 45, 46, 51, 53, 54, 56
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

ECM C1

Pin

Wire Color

Circuit No.

Function

1

PU

1589

Fuel Level Sensor Signal

2

L-BU

1162

APP Sensor 2 Signal

3

D-GN

890

Fuel Tank Pressure Sensor Signal

4

D-BU

1161

APP Sensor 1 Signal

5

--

--

Not Used

6

D-GN

1433

PNP/Clutch Start Switch Signal

7

--

--

Not Used

8

BN/WH

379

CPP Switch Signal

9

PU

420

TCC Brake Switch/Cruise Control Release Signal

10

WH/BK

1164

5-Volt Reference

11

L-BU

20

Stop Lamp Switch Signal

12

BN

4

Accessory Voltage

13

GY

705

5-Volt Reference

14

D-GN/WH

465

Fuel Pump Relay Control

15

D-BU

1884

Cruise Control Switch Signal

16

PU

1807

Class 2 Serial Data

17

PU

1807

Class 2 Serial Data (ABS)

18

BN

5069

Main Relay Control

19-26

--

--

Not Used

27

YE

1139

Ignition 1 Voltage

28

--

--

Not Used

29

PU

421

Air Solenoid Control (NU3)

30

WH

1310

EVAP Canister Vent Solenoid Control

31

D-GN/WH

459

A/C Compressor Clutch Relay Control

32-40

--

--

Not Used

41

PU

1272

Low Reference

42-44

--

--

Not Used

45

BN/WH

419

MIL Control

46

YE

447

Starter Relay Coil Control

47-50

--

--

Not Used

51

OG

480

Battery Positive Voltage

52

--

--

Not Used

53

BN

1271

Low Reference

54

BK

2759

Low Reference

55

--

--

Not Used

56

TN

1274

5-Volt Reference

ECM C2


Object Number: 1332467  Size: CH

Connector Part Information

  • OEM: 15480947
  • Service: 88953274
  • Description: 73-Way F GT 280 Micro 64 Sealed (BK)

Terminal Part Information

  • Pins: 3, 5, 10-15, 17-19, 24-31, 34, 36, 38, 40-44, 47-55, 58-68, 70-72
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 15304720/19
  • Core/Insulation Crimp: 4/5
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)

ECM C2

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Available

3

YE

581

TAC Motor Control - 1

4

--

--

Not Available

5

BN

582

TAC Motor Control - 2

6-9

--

--

Not Available

10

BK

1744

Fuel Injector 1 Control

11

PK/BK

1746

Fuel Injector 3 Control

12

L-BU/BK

844

Fuel Injector 4 Control

13

L-GN/BK

1745

Fuel Injector 2 Control

14

BN

436

Air Pump Relay Control (NU3)

15

D-GN/WH

428

EVAP Canister Purge Solenoid Control

16

--

--

Not Available

17

BK/WH

1423

HO2S Heater Low Control - 1

18

YE

400

Signal High - Front/VSS High Signal/OSS High Signal (M/T)

--

--

Not Available (A/T)

19

PU

401

Signal Low - Front VSS Low Signal/OSS Low Signal (M/T)

--

--

Not Available (A/T)

20-23

--

--

Not Available

24

GY

2701

5-Volt Reference

25

GY

2704

5-Volt Reference

26

L-BU/BK

1688

5-Volt Reference

27

GY

474

5-Volt Reference (NU3)

28

GY

2700

5-Volt Reference (C60)

29

BK/WH

1704

Low Reference

30

WH

5268

Air Pressure Sensor Signal (NU3)

31

BK

2752

Low Reference

32-33

--

--

Not Available

34

PK/BK

5290

Ignition 1 Voltage

35

--

--

Not Available

36

PU

486

TP Sensor 2 Signal

37

--

--

Not Available

38

BK

2760

Low Reference

39

--

--

Not Available

40

OG/BK

469

Low Reference

41

PU

1666

HO2S High Signal - 1

42

TN

1667

HO2S Low Signal - 1

43

PU/WH

1668

HO2S High Signal - 2

44

TN/WH

1669

HO2S Low Signal - 2

45-46

--

--

Not Available

47

D-GN

335

Low Speed Cooling Fan Relay Control

48

TN/BK

231

Oil Pressure Switch Signal

49

RD/BK

380

A/C Refrigerant Pressure Sensor Signal (C60)

50

YE

410

ECT Sensor Signal

51

GY

23

Generator Field Duty Cycle Signal

52

YE

492

MAF Sensor Signal

53

D-GN

676

HO2S Heater Low Control - 1

54

WH

423

IC Timing Control

55

OG

406

IC Timing Control (B)

56-57

--

--

Not Available

58

D-GN

485

TP Sensor 1 Signal

59

BK

2751

Low Reference (C60)

60

BK

407

Low Reference (NU3)

61

BK

2761

Low Reference

62

L-GN

432

MAP Sensor Signal

63

RD

225

Generator Turn On Signal

64

TN/WH

2500

High Speed GMLAN Serial Data Bus +

65

TN

2501

High Speed GMLAN Serial Data Bus -

66

YE

573

CKP Sensor Signal

67

PU

574

Low Reference

68

TN

472

IAT Sensor Signal

69

--

--

Not Available

70

BN/WH

633

CMP Sensor Signal

71

GY

1716

Knock Sensor Signal

72

D-BU

496

Knock Sensor Signal

73

BK/WH

451

Ground