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: 816165  Size: CH

Connector Part Information

  • OEM: 1928403379
  • Service: 88952771
  • Description: 64-Way F Bosch (BK)

Terminal Part Information

  • 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

TN

407

KS 2 Signal

2

--

--

Not Used

3

L-GN

5278

HO2S Input Pump Current Sensor 1

4

OG

5275

CMP Sensor Signal - Intake Bank 1

5

GY

605

5-Volt Reference

6

--

--

Not Used

7

TN

470

Low Reference

8

PU

486

TP Sensor 2 Signal

9

D-GN/WH

2124

IC 4 Control

10

WH/BK

5039

CKP Sensor Signal

11

--

--

Not Used

12

OG/BK

5272

CMP Actuator Solenoid Control - Intake Bank 2

13

L-GN

5282

CMP Actuator Solenoid Control - Exhaust Bank 1

14

--

--

Not Used

15

BN

582

Throttle Actuator Control Close

16

GY/WH

3113

HO2S Heater Control Sensor 1

17

GY

1716

KS 1 Signal

18

--

--

Not Used

19

PU/WH

1665

HO2S Reference Voltage Sensor 1

20

D-GN

5273

CMP Sensor Signal - Exhaust Bank 1

21

GY

23

Generator Field Duty Cycle Signal

22

--

--

Not Used

23

YE

410

ECT Sensor Signal

24

--

--

Not Used

25

L-BU/WH

2126

IC 6 Control

26

OG/WH

2122

IC 2 Control

27-28

--

--

Not Used

29

PU

5284

CMP Actuator Solenoid Control - Intake Bank 1

30

WH/BK

5283

CMP Actuator Solenoid Control - Exhaust Bank 2

31

YE

581

Throttle Actuator Control Open

32

--

--

Not Used

33

D-BU

496

KS 1 Signal

34

--

--

Not Used

35

WH

5279

HO2S Pump Current Sensor 1

36

PU

5274

CMP Sensor Signal - Exhaust Bank 2

37

BN

1174

Engine Oil Level Sensor Signal

38

D-GN/WH

357

Engine Oil Temperature Sensor Signal

39

TN

2752

Low Reference

40

TN/BK

231

Engine Oil Pressure Sensor Signal

41

D-GN

2125

IC 5 Control

42

PU

2121

IC 1 Control

43

OG

225

Generator Turn On Signal

44

L-BU/BK

5041

Intake Manifold Runner Control (IMRC) Solenoid Control

45

L-BU/BK

844

Fuel Injector 4 Control

46

PK/BK

1746

Fuel Injector 3 Control

47

TN/WH

845

Fuel Injector 5 Control

48

D-GN/WH

428

EVAP Canister Purge Solenoid Valve Control

49

GY/BK

1798

Drain Wire

50

L-BU

1876

KS 2 Signal

51

--

--

Not Used

52

TN

1664

HO2S Low Reference Sensor 1

53

YE

5276

CMP Sensor Signal - Intake Bank 2

54

GY

2701

5-Volt Reference

55

D-GN

485

TP Sensor 1 Signal

56

OG/BK

5266

BARO Sensor Signal

57

GY

705

5-Volt Reference

58

L-BU

2123

IC 3 Control

59

PU/WH

5024

CKP Sensor Low Reference

60-61

--

--

Not Used

62

L-GN/BK

1745

Fuel Injector 2 Control

63

TN

1744

Fuel Injector 1 Control

64

YE/BK

846

Fuel Injector 6 Control

Engine Control Module (ECM) C2


Object Number: 1331455  Size: CH

Connector Part Information

  • OEM: 15368916
  • Service: 88956567
  • Description: 64-Way F Hole Plug Sealed (BK)

Terminal Part Information

  • Terminal/Tray: 1928498016/17
  • Core/Insulation Crimp: Pins 1, 2, 17, 25, 33: See Terminal Repair Kit
  • Core/Insulation Crimp: Pins 3, 4, 5, 7, 8, 9, 10, 11, 12, 14, 15, 19, 20, 22, 23, 24, 26, 29, 30, 31, 32, 35, 36, 37, 39, 40, 42, 43, 44, 45, 46, 48, 49, 50, 55, 56, 57, 58, 60: N/N
  • Release Tool/Test Probe: J-38125-560/J-35616-64B (L-BU)

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

PK

5290

Ignition 1 Voltage

2

BK

3122

HO2S Heater Control Sensor 2

3

PK

139

Ignition 1 Voltage

4

D-BU

473

High Speed Cooling Fan Relay Control

5

WH

121

Engine Speed Signal

6

--

--

Not Used

7

WH/BK

1164

5-Volt Reference

8

PU

1272

Low Reference

9

RD/BK

380

A/C Refrigerant Pressure Sensor Signal

10

WH

17

Stop Lamp Switch Signal

11

TN

472

IAT Sensor Signal

12

D-GN

890

Fuel Tank Pressure Sensor Signal

13

--

--

Not Used

14

GY/BK

87

Cruise Control Resume/Accel Switch Signal

15

OG/BK

463

Requested Torque Signal

16

--

--

Not Used

17

PK

5290

Ignition 1 Voltage

18

--

--

Not Used

19

D-GN/WH

465

Fuel Pump Relay Control

20

D-GN

335

Low Speed Cooling Fan Relay Control

21

--

--

Not Used

22

D-GN

389

Vehicle Speed Signal

23

TN/WH

2500

High Speed GMLAN Serial Data Bus (+)

24

BN

5069

Powertrain Relay Coil Control

25

BK

2759

Low Reference

26

BK

2760

Low Reference

27-28

--

--

Not Used

29

PU/WH

1668

HO2S Signal Sensor 2

30

D-BU

84

Cruise Control Set/Coast Switch Signal

31

YE

5

Crank Request Signal

32

OG/BK

1786

Park/Neutral Signal

33

WH

1310

EVAP Canister Vent Solenoid Valve Control

34

--

--

Not Used

35

YE/BK

625

Starter Enable Relay Control

36

OG

540

Battery Positive Voltage

37

TN/BK

464

Delivered Torque Signal

38

--

--

Not Used

39

GY

2709

5-Volt Reference

40

BN

1271

Low Reference

41

--

--

Not Used

42

PU

1589

Fuel Level Sensor Signal

43

YE

492

MAF Sensor Signal

44

L-BU

1162

APP Sensor 2 Signal

45

GY

397

Cruise Control On Switch Signal

46

PU

420

TCC Brake Switch Signal

47

--

--

Not Used

48

D-GN

1049

Class 2 Serial Data

49

D-GN/WH

459

A/C Compressor Clutch Relay Control

50

BN/WH

419

MIL Control

51-54

--

--

Not Used

55

TN

2501

High Speed GMLAN Serial Data Bus (-)

56

TN

1274

5-Volt Reference

57

TN/WH

1669

HO2S Low Reference Sensor 2

58

D-GN

500

Ignition 0 Voltage

59

--

--

Not Used

60

D-BU

1161

APP Sensor Signal 1

61-64

--

--

Not Used