GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Control Module (ECM) C1
Table 2: Engine Control Module (ECM) C2

Engine Control Module (ECM) C1


Object Number: 1331454  Size: CH

Connector Part Information

    • 1928403513
    • 64-Way F Bosch (BK)

Pin

Wire Color

Circuit No.

Function

1

TN

407

Low Reference

2

OG

5280

HO2S Input Pump Current - Bank 2 Sensor 1

3

L-GN

5278

HO2S Input Pump Current - Bank 1 Sensor 1

4

OG

5275

CMP Sensor Signal - Intake Bank 1

5

GY

605

5-Volt Reference A

6

--

--

Not Used

7

TN

470

Low Reference

8

PU

486

TP Sensor Signal 2

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

TN

582

TAC Motor Control - 2

16

GY/WH

3113

HO2S Heater Low Control - Bank 1 Sensor 1

17

GY

1716

Low Reference

18

TN

1667

HO2S Low Reference - Bank 2 Sensor 1

19

PU/WH

1665

HO2S Reference Voltage - Bank 1 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

PK

5284

CMP Actuator Solenoid Control - Intake Bank 1

30

WH/BK

5283

CMP Actuator Solenoid Control - Exhaust Bank 2

31

YE

581

TAC Motor Control - 1

32

L-GN

3212

HO2S Heater Low Control - Bank 2 Sensor 1

33

D-BU

496

Knock Sensor 1 Signal

34

PU

1666

HO2S Reference Voltage - Bank 2 Sensor 1

35

WH

5279

HO2S Pump Current - Bank 1 Sensor 1

36

PU

5274

CMP Sensor Signal - Exhaust Bank 2

37

BN

1174

Oil Level Switch Signal

38

D-GN/WH

357

Oil Temperature Sensor Signal

39

TN

2752

Low Reference

40

TN/BK

231

Oil Pressure Switch Signal

41

D-GN

2125

IC 5 Control

42

PU

2121

IC 1 Control

43

OG

225

Generator Turn On Signal

44

D-BU/BK

5041

IMRC Solenoid Control

45

D-BU/BK

844

Fuel Injector 4 Control

46

PK/BK

1746

Fuel Injector 3 Control

47

TN/WH

845

Fuel Injector 5 Control

48

L-GN/WH

428

EVAP Canister Purge Solenoid Control

49

GY/BK

1798

Drain Wire

50

L-BU

1876

Knock Sensor 2 Signal

51

PU/WH

5281

HO2S Pump Current - Bank 2 Sensor 1

52

TN

1664

HO2S Low Reference - Bank 1 Sensor 1

53

YE

5276

CMP Sensor Signal - Intake Bank 2

54

GY

2701

5-Volt Reference C

55

D-GN

485

TP Sensor Signal 1

56

OG/BK

5266

BARO Sensor Signal

57

GY

705

5-Volt Reference B

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

    • 1928403386
    • 64-Way F Bosch (BK)

Pin

Wire Color

Circuit No.

Function

1

PK/BK

5290

Ignition 1 Voltage

2

GY/WH

3122

HO2S Heater Low Control - Bank 1 Sensor 2

3

PK

239

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 A

8

PU

1272

Low Reference

9

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

10

OG

5371

BAS Relay Coil Supply Voltage

11

TN

472

IAT Sensor Signal

12

D-GN

890

Fuel Tank Pressure Sensor Signal

13-14

--

--

Not Used

15

OG/BK

463

Requested Torque Signal

16

--

--

Not Used

17

PK/BK

5290

Ignition 1 Voltage

18

OG/WH

3223

HO2S Heater Low Control - Bank 2 Sensor 2

19

D-GN/WH

465

Fuel Pump Relay Control

20

D-GN

335

Low Speed Cooling Fan Relay Control

21

--

--

Not Used

22

BN

818

Vehicle Speed Signal

23

WH

2500

High Speed GMLAN Serial Data Bus+ (M82)

24

BN

5069

MAIN Relay Control

25

TN

452

Low Reference

26

TN

2760

Low Reference

27

L-BU

1937

Fuel Level Sensor Signal - Secondary

28

--

--

Not Used

29

PU/WH

1668

HO2S Signal - Bank 1 Sensor 2

30

--

--

Not Used

31

YE

5

Crank Voltage

32

OG/BK

1786

Park/Neutral Signal (M82)

33

WH

1310

EVAP Canister Vent Solenoid Control

34

--

--

Not Used

35

YE

447

Starter Relay Coil Control

36

RD/WH

1440

Battery Positive Voltage

37

TN/BK

464

Delivered Torque Signal

38

--

--

Not Used

39

GY

596

5-Volt Reference A

40

BN

1271

Low Reference

41

TN

1671

HO2S Low Referene - Bank 2 Sensor 2

42

D-BU

1936

Fuel Level Sensor Signal - Primary

43

YE

492

MAF Sensor Signal

44

L-BU

1162

APP Sensor 2 Signal

45-46

--

--

Not Used

47

YE/BK

5270

Engine Drag Control Signal

48

PU

1807

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

L-GN

2501

High Speed GMLAN Serial Data Bus- (M82)

56

TN

1274

5-Volt Reference C

57

TN/WH

1669

HO2S Low Reference - Bank 1 Sensor 2

58

YE

343

Accessory Voltage

59

GY

1884

Cruise Control Switch Signal

60

D-BU

1161

APP Sensor Signal 1

61

PU

1670

HO2S Signal - Bank 2 Sensor 2

62

--

--

Not Used

63

GY

847

Extended Travel Brake Switch Signal

64

--

--

Not Used