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: 877914  Size: CH

Connector Part Information

    • 15336786
    • 28 Way F Bosch (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

GY

705

5 Volt Reference

3

D-GN

890

Fuel Tank Pressure Sensor Signal

4

PU

420

Stop Lamp Switch Signal

5

GY

1884

Cruise Control Set/Coast and Resume/Accelerate Switch Signal (K34)

6

--

--

Not Used

7

PU

1589

Fuel Level Sensor Signal

8

BN

4

Accessory Voltage

9

--

--

Not Used

10

BK

2759

Low Reference

11

L-BU

20

Stop Lamp Switch Signal

12

PU

1807

ECM Class 2 Serial Data

13

TN/WH

2500

High Speed GM LAN Serial Data Bus+

14-15

--

--

Not Used

16

BN/WH

419

MIL Control

17

WH

1310

EVAP Canister Vent Solenoid Control

18

PU

1807

ECM Class 2 Serial Data (JM4)

19

TN

2501

High Speed GM LAN Serial Data Bus-

20

--

--

Not Used

21

D-GN/WH

459

A/C Compressor Clutch Relay Control (C60)

22

OR

480

Battery Positive Voltage

23

PK

639

Ignition 1 Voltage

24

--

--

Not Used

25

D-GN/WH

465

Fuel Pump Relay Control

26

L-GN

1887

Cruise Control Servo Move Direction Signal (K34)

27

L-BU

1888

Cruise Control Servo Clutch Control (K34)

28

PK

1886

Cruise Control Servo Move Signal (K34)

Engine Control Module (ECM) C2


Object Number: 877912  Size: CH

Connector Part Information

    • 15336796
    • 80 Way F 101/ Bosch (BK)

Pin

Wire Color

Circuit No.

Function

1

TN

2501

High Speed GM LAN Serial Data Bus-

2

--

--

Not Used

3

L-GN

432

MAP Sensor Signal

4

D-BU

417

TP Sensor Signal

5

--

--

Not Used

6

RD/BK

380

A/C Refrigerant Pressure Sensor Signal (C60)

7

YE

410

ECT Sensor Signal

8

--

--

Not Used

9

PU

574

Low Reference

10

YE

573

CKP Sensor Signal

11

D-BU

496

Knock Sensor Signal

12

PU

1666

HO2S High Signal Sensor 1

13

PU/WH

1668

HO2S High Signal Sensor 2

14-16

--

--

Not Used

17

BN/WH

633

CMP Sensor Signal

18-21

--

--

Not Used

22

TN/WH

2500

High Speed GM LAN Serial Data Bus+

23

--

--

Not Used

24

OR/BK

469

Low Reference

25

BK

2752

Low Reference

26

--

--

Not Used

27

BK

2751

Low Reference (C60)

28

BK

2761

Low Reference

29-30

--

--

Not Used

31

GY

1716

Low Reference

32

--

--

Not Used

33

TN

1667

HO2S Low Signal Sensor 1

34

TN/WH

1669

HO2S Low Signal Sensor 2

35-36

--

--

Not Used

37

TN/BK

231

Oil Pressure Switch Signal

38

GY

23

Generator Field Duty Cycle Signal

39-42

--

--

Not Used

43

GY

2704

5 Volt Reference

44

GY

2701

5 Volt Reference

45

--

--

Not Used

46

GY

2700

5 Volt Reference (C60)

47

TN

472

IAT Sensor Signal

48

D-GN

1433

PNP/Clutch Start Switch Signal

49

--

--

Not Used

50

PU

401

VSS Signal Low (M86)

51

--

--

Not Used

52

L-BU/BK

1748

IAC Coil A Low Control

53-54

--

--

Not Used

55

BK/WH

1423

HO2S Heater Low Control Sensor 2

56

BK

1744

Fuel Injector 1 Control

57

L-GN/BK

1745

Fuel Injector 2 Control

58-60

--

--

Not Used

61

WH

423

IC Timing Control

62

RD

225

Generator Turn On Signal

63

OR

406

IC Timing Control

64-65

--

--

Not Used

66

YE

447

Starter Relay Coil Control

67

D-GN

335

Cooling Fan Relay Control

68

--

--

Not Used

69

BK

2760

Low Reference

70

YE

400

VSS Signal High (M86)

71

L-GN/WH

1749

IAC Coil B High Control

72

L-GN/BK

444

IAC Coil B Low Control

73

L-BU/WH

1747

IAC Coil A High Control

74

--

--

Not Used

75

D-GN

676

HO2S Heater High Control Sensor 1

76

D-GN/WH

428

EVAP Canister Purge Solenoid Control

77

PK/BK

1746

Fuel Injector 3 Control

78

L-BU/BK

844

Fuel Injector 4 Control

79

BK/WH

451

Ground

80

BK/WH

451

Ground