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: 1228485  Size: CH

Connector Part Information

  • OEM: 13551184
  • Service: 88953346
  • Description: 56-Way F Micro-Pack 64 Series (BU)

Terminal Part Information

  • Pins: 1, -4, 6, 8-14, 18, 28, 30, 31, 41, 45, 46, 52-54, 56
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

PU

1589

Fuel Level Sensor Signal (+ Primary)

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

Clutch Start Switch Signal

7

--

--

Not Used

8

BN/WH

379

CPP Switch Signal (w/M86)

9

PU

420

TCC Brake Switch/Cruise Control Release Signal

10

WH/BK

1164

5-Volt Reference

11

L-BU

20

Stop Lamp Supply Voltage

12

BN

4

Accessory Voltage

13

GY

2709

5-Volt Reference

14

D-GN/WH

465

Fuel Pump Relay Control (- Primary)

15-17

--

--

Not Used

18

BN

5069

Powertrain Relay Control

19-27

--

--

Not Used

28

PK

1039

Ignition 1 Voltage

29

--

--

Not Used

30

WH

1310

EVAP Canister Vent Solenoid Control

31

D-GN/WH

459

A/C Compressor Clutch Relay Control

32-40

--

--

Not Used

41

TN

1274

5-Volt Reference

42-44

--

--

Not Used

45

BN/WH

419

MIL Control

46

YE

447

Starter Relay Coil Control

47-51

--

--

Not Used

52

RD/WH

840

Battery Positive Voltage

53

BN

1271

Low Reference

54

TN

2759

Low Reference

55

--

--

Not Used

56

PU

1272

Low Reference

Engine Control Module (ECM) C2


Object Number: 1332467  Size: CH

Connector Part Information

  • OEM: 15471385
  • Service: 88953274
  • Description: 73-Way F Micro-Pack 64 Series (BU)

Terminal Part Information

  • Pins: 3, 5, 10-13, 15, 17-19, 24-26, 28, 29, 31, 34, 36, 38, 40-44, 47-55, 58, 59, 61-68, 70-73
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

YE

581

TAC Motor Control 1

4

--

--

Not Used

5

BN

582

TAC Motor Control 2

6-9

--

--

Not Used

10

TN

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

--

--

Not Used

15

D-GN/WH

428

EVAP Canister Purge Solenoid Control

16

--

--

Not Used

17

TN/WH

1423

Heated Oxygen Sensor Heater Low Control Sensor (2)

18

YE

400

Vehicle Speed Sensor Signal High (w/M86)

19

PU

401

Vehicle Speed Sensor Signal Low (w/M86)

20-23

--

--

Not Used

24

GY

2701

5-Volt Reference

25

GY

2704

5-Volt Reference

26

L-BU/BK

1688

5-Volt Reference

27

--

--

Not Used

28

GY

2700

5-Volt Reference

29

TN/WH

1704

Low Reference

30

--

--

Not Used

31

TN

2752

Low Reference

32-33

--

--

Not Used

34

PK/BK

5290

Ignition 1 Voltage

35

--

--

Not Used

36

PU

486

Throttle Position Sensor (2) Signal

37

--

--

Not Used

38

TN

2760

Low Reference

39

--

--

Not Used

40

OG/BK

469

Low Reference

41

PU/WH

3110

Heated Oxygen Sensor High Signal Sensor 1

42

TN/WH

3111

Heated Oxygen Sensor Low Signal Sensor 1

43

PU/WH

1668

Heated Oxygen Sensor High Signal Sensor 2

44

TN/WH

1669

Heated Oxygen Sensor Low Signal Sensor 2

45-46

--

--

Not Used

47

D-GN

335

Cooling Fan Relay Control

48

TN/BK

231

Oil Pressure Switch Signal

49

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

50

YE

410

Engine Coolant Temperature Sensor Signal

51

GY

23

Generator Field Duty Cycle Signal

52

YE

492

Mass Air Flow Sensor Signal

53

GY/WH

3113

Heated Oxygen Sensor Heater Low Control Sensor (1)

54

WH

423

Ignition Control Timing Control

55

OG

406

Ignition Control Timing Control (B)

56-57

--

--

Not Used

58

D-GN

485

Throttle Position Sensor 1 Signal

59

BK/WH

2751

Low Reference

60

--

--

Not Used

61

TN

2761

Low Reference

62

L-GN

432

Manifold Absolute Pressure Sensor Signal

63

OG

225

Generator Turn On Signal

64

TN/BK

2500

High Speed GMLAN Serial Data (+)

65

TN

2501

High Speed GMLAN Serial Data (-)

66

YE

573

Crankshaft Position Sensor Signal (1)

67

PU

574

Low Reference

68

TN

472

Intake Air Temperature Sensor Signal

69

--

--

Not Used

70

BN/WH

633

Camshaft Position Sensor Signal

71

GY

1716

Knock Sensor Signal

72

D-BU

496

Knock Sensor Signal

73

BK/WH

451

Ground