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

PCM Connector C1


Object Number: 73173  Size: CH

Connector Part Information

    • 12191110
    • 80 Pin PCM Connector C1 (BLU)

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

Ground

2

LT GRN

1867

12 Volt Reference

3

LT GRN/BLK

1745

Fuel Injector 2 Control

4

PNK/BLK

1746

Fuel Injector 3 Control

5-7

--

--

Not Used

8

GRY

2701

5 Volt Reference

9-11

--

--

Not Used

12

YEL

573

CKP Sensor - 1 Signal

13-16

--

--

Not Used

17

DK BLU

1225

Transmission Fluid Pressure Switch Signal B

18

RED

1226

Transmission Fluid Pressure Switch Signal C

19

PNK

439

Ignition 1 Voltage

20

ORN

440

Battery Positive Voltage

21

YEL/BLK

1868

Low Reference

22

--

--

Not Used

23

BLK

470

Low Reference

24

--

--

Not Used

25

TAN

1671

HO2S Low Signal - Bank 2 Sensor 2

26

TAN

1667

HO2S Low Signal - Bank 2 Sensor 1

27

--

--

Not Used

28

TAN/WHT

1669

HO2S Low Signal - Bank 1 Sensor 2

29

TAN/WHT

1653

HO2S Low Signal - Bank 1 Sensor 1

30-31

--

--

Not Used

32

BLK/WHT

771

Transmission Range Switch Signal A

33

PPL

420

TCC Brake Switch Signal

34

WHT

776

Transmission Range Switch Signal P

35

--

--

Not Used

36

BLK

1744

Fuel Injector 1 Control

37

YEL/BLK

846

Fuel Injector 6 Control

38-39

--

--

Not Used

40

BLK/WHT

451

Ground

41

BLK

2753

Low Reference

42

--

--

Not Used

43

LT BLU/BLK

844

Fuel Injector 4 Control

44

RED/BLK

877

Fuel Injector 7 Control

45

--

--

Not Used

46

GRY

2709

5-Volt Reference

47

GRY

2702

5-Volt Reference

48

GRY

2704

5-Volt Reference

49-50

--

--

Not Used

51

DK BLU

496

KS - 1 Signal

52

--

--

Not Used

53

BLK

2762

Low Reference

54

ORN/BLK

469

Low Reference

55

BRN

1456

EGR Valve Position Signal

56

--

--

Not Used

57

ORN

440

Battery Positive Voltage

58

PPL

1807

Class 2 Serial Data - Primary

59

PPL

1807

Class 2 Serial Data - Primary

60

BLK

2752

Low Reference

61

PNK/BLK

632

Low Reference

62-64

--

--

Not Used

65

PPL

1670

HO2S High Signal - Bank 2 Sensor 2

66

PPL

1666

HO2S High Signal - Bank 2 Sensor 1

67

--

--

Not Used

68

PPL/WHT

1668

HO2S High Signal - Bank 1 Sensor 2

69

PPL/WHT

1665

HO2S High Signal - Bank 1 Sensor 1

70-71

--

--

Not Used

72

YEL

772

Transmission Range Switch Signal B

73

BRN/WHT

633

CMP Sensor Signal

74

YEL

410

ECT Sensor Signal

75

PNK

1020

Off/Run/Crank Voltage

76

BLK/WHT

845

Fuel Injector 5 Control

77

DK BLU/WHT

878

Fuel Injector 8 Control

78

--

--

Not Used

79

WHT

687

3-2 Shift Solenoid Valve Control

80

BLK

2761

Low Reference

PCM Connector C2


Object Number: 73173  Size: CH

Connector Part Information

    • 12191110
    • 80 Pin PCM Connector C2 (RED)

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

Ground

2

BRN

418

TCC PWM Solenoid Valve Control

3-5

--

--

Not Used

6

RED/BLK

1228

PC Solenoid Valve High Control - Sol. A

7

RED

1676

EGR Valve Supply Voltage

8

LT BLU/WHT

1229

PC Solenoid Valve Low Control - Sol. A

9

DK GRN/WHT

465

Fuel Pump Relay Control - Primary

10-12

--

--

Not Used

13

LT BLU/BLK

396

Cruise Control Engaged Signal

14

--

--

Not Used

15

RED

225

Generator Turn On Signal

16

--

--

Not Used

17

DK GRN/WHT

2523

A/C Request Signal

18-19

--

--

Not Used

20

LT GRN/BLK

822

VSS Low Signal

21

PPL/WHT

821

VSS High Signal

22

RED/BLK

1230

AT ISS High Signal

23

DK BLU/WHT

1231

AT ISS Low Signal

24

DK BLU

417

TP Sensor Signal

25

TAN

472

IAT Sensor Signal

26

WHT

423

IC Timing Control

27-30

--

--

Not Used

31

YEL

492

MAF Sensor Signal

32

LT GRN

432

MAP Sensor Signal

33

--

--

Not Used

34

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

35

BRN

25

Charge Indicator Control

36

BRN

436

AIR Pump Relay Control

37

--

--

Not Used

38

PPL

30

Fuel Level Sensor Signal

39

RED

631

12 Volt Reference

40

BLK/WHT

451

Ground

41

WHT

257

EGR Solenoid Control

42

TAN/BLK

422

TCC Solenoid Valve Control

43

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

44

--

--

Not Used

45

WHT

1310

EVAP Canister Vent Solenoid Control

46

BRN/WHT

419

MIL Control

47

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

48

LT GRN

1222

1-2 Shift Solenoid Valve Control

49

YEL/BLK

1827

Vehicle Speed Signal

50

DK GRN/WHT

817

VSS Signal

51

YEL/BLK

1227

TFT Sensor Signal

52

GRY

23

Generator Field Duty Cycle Signal

53

--

--

Not Used

54

PPL

1589

Fuel Level Sensor Signal - Primary

55

DK GRN

603

A/C Low Pressure Switch Signal

56

--

--

Not Used

57

BLK

2760

Low Reference

58-61

--

--

Not Used

62

GRY

773

Transmission Range Switch Signal C

63

PNK

1224

Transmission Fluid Pressure Switch Signal A

64

DK GRN

890

Fuel Tank Pressure Sensor Signal

65-75

--

--

Not Used

76

LT GRN/WHT

1749

IAC Coil B High Control

77

LT GRN/BLK

444

IAC Coil B Low Control

78

LT BLU/BLK

1748

IAC Coil A Low Control

79

LT BLU/WHT

1747

IAC Coil A High Control

80

--

--

Not Used