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

Powertrain Control Module (PCM) C1


Object Number: 73173  Size: CH

Connector Part Information

    • 12191110
    • 80-Way F Micro-Pack 100 W Series Sealed (BLU)

Pin

Wire Color

Circuit No.

Function

1

BLK

2762

Low Reference

2-3

--

--

Not Used

4

LT GRN

1222

1-2 Shift Solenoid or Shift Solenoid A-Valve Control

5

DK BLU

473

High Speed Cooling Fan Relay Control

6

DK GRN

335

Low Speed Cooling Fan Relay Control

7

ORN

1799

High Resolution Signal

8

LT BLU/WHT

1800

CKP Sensor 2 Signal

9

YEL

573

CKP Sensor 1 Signal

10

GRY

2704

5-Volt Reference

11

--

--

Not Used

12

BLK

2761

Low Reference

13

ORN/BLK

469

Low Reference

14-15

--

--

Not Used

16

BLK/WHT

451

Ground

17

BLK

2760

Low Reference

18

--

--

Not Used

19

PPL

1500

Ignition 0 Voltage

20

ORN

540

Battery Positive Voltage

21

--

--

Not Used

22

PNK

1224

Transmission Fluid Pressure Switch Signal A

23-27

--

--

Not Used

28

BLK

808

Low Reference

29

BLK

808

Low Reference

30

PPL

420

TCC Brake Switch Signal

31

BLK

2753

Low Reference

32

GRY

435

EGR Solenoid Control

33

DK BLU

496

KS Signal

34-37

--

--

Not Used

38

LT GRN/WHT

1749

IAC Coil B High Control

39-42

--

--

Not Used

43

YEL/BLK

846

Fuel Injector 6 Control

44

YEL/BLK

1223

2-3 Shift Solenoid or Shift Solenoid B-Valve Control

45

PNK/BLK

429

AIR Solenoid Control

46

LT GRN/BLK

1745

Fuel Injector 2 Control

47

BLK

1744

Fuel Injector 1 Control

48

YEL/BLK

2174

Low Reference

49

PPL

2121

IC 1 Control

50

RED/WHT

2122

IC 2 Control

51

LT BLU/WHT

2126

IC 6 Control

52

DK GRN

2125

IC 5 Control

53

DK GRN/WHT

2124

IC 4 Control

54

LT BLU

2123

IC 3 Control

55

DK GRN/WHT

817

VSS Signal

56

BLK/WHT

451

Ground

57

BLK/WHT

451

Ground

58

DK GRN

1049

PCM Class 2 Serial Data

59

--

--

Not Used

60

BLK/WHT

451

PCM Ground

61

BLK

2752

Low Reference

62

DK BLU/WHT

1231

AT ISS Low Signal

63

RED/BLK

1230

AT ISS High Signal

64

YEL

400

VSS High Signal

65

PPL

401

VSS Low

66-67

--

--

Not Used

68

YEL

772

Transaxle Range Switch Input B

69

YEL

492

MAF Sensor Signal

70

--

--

Not Used

71

ORN/BLK

463

Requested Torque Signal

72

DK GRN

83

Cruise Control Inhibit Signal

73

LT BLU/BLK

844

Fuel Injector 4 Control

74-75

--

--

Not Used

76

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

77-78

--

--

Not Used

79

BLK/WHT

845

Fuel Injector 5 Control

80

--

--

Not Used

Powertrain Control Module (PCM) C2


Object Number: 73173  Size: CH

Connector Part Information

    • 12191110
    • 80-Way F Micro-Pack 100 W Series Sealed (NAT)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

WHT

1310

EVAP Canister Vent Solenoid Control

3

DK GRN/WHT

465

Fuel Pump Relay Control - Primary

4

RED

1676

EGR Valve Supply Voltage

5

BRN/WHT

419

MIL Control

6

--

--

Not Used

7

LT BLU/WHT

1747

IAC Coil A High

8

WHT

121

Engine Speed Signal

9

TAN/BLK

464

Delivered Torque Signal

10

PPL/WHT

1665

HO2S High Signal Bank 1 Sensor 1

11

PPL/WHT

1668

HO2S High Signal Bank 1 Sensor 2

12-15

--

--

Not Used

16

WHT

776

Transaxle Range Switch Signal P

17

RED

1226

Trans Fluid Pressure Switch C

18

BLK/WHT

771

Transmission Range Switch Signal A

19

TAN/BLK

231

Oil Pressure Switch Signal

20-21

--

--

Not Used

22

DK GRN/WHT

762

A/C Request Signal

23

PPL

806

Crank Voltage

24

PNK

439

Ignition 1 Voltage

25

LT GRN

432

MAP Sensor Signal

26

YEL

410

ECT Sensor Signal

27

RED/BLK

380

A/C Pressure Sensor Signal

28

BRN

1456

EGR Valve Position Signal

29

GRY

23

Generator Field Duty Cycle Signal

30

GRY

2702

EGR Pintle Position Sensor 5-Volt Reference A

31

  

Not Used

32

GRY

2709

5-Volt Reference

33

GRY

2701

5-Volt Reference

34

GRY

2700

5-Volt Reference

35

BLK

808

Low Reference

36

--

--

Not Used

37

BLK/WHT

3113

HO2S #1 Heater Control

38

--

--

Not Used

39

DK GRN/WHT

459

A/C Clutch Relay Control

40-41

--

--

Not Used

42

PNK/BLK

1746

Fuel Injector 3 Control

43

--

--

Not Used

44

LT BLU/BLK

1748

IAC Coil A Low

45

RED/BLK

1228

Pressure Control Solenoid High

46

LT BLU/WHT

1229

PC Solenoid Valve Low Control - Sol. A

47

--

--

Not Used

48

BRN

2391

HO2S #2 Heater Control

49

LT GRN/BLK

444

IAC Coil B Low Control

50

TAN

472

IAT Sensor Signal

51-54

--

--

Not Used

55

DK GRN

890

Fuel Tank Pressure Sensor Signal

56

GRY

773

Transmission Range Switch Signal C

57

DK BLU

1225

Transmission Fluid Pressure Switch Signal B

58

BRN

1174

Oil Level Switch Signal

59

LT BLU/BLK

396

Cruise Control Engaged Signal

60

--

--

Not Used

61

RED

225

Generator Turn On Signal

62

--

--

Not Used

63

YEL

657

TCC Release Switch Signal

64-65

--

--

Not Used

66

DK BLU

417

TP Sensor Signal

67

--

--

Not Used

68

YEL/BLK

1227

TFT Sensor Signal

69

PPL

1589

Fuel Level Sensor Signal - Primary

70

LT GRN

1867

12-Volt Reference

71

LT GRN/WHT

2867

12-Volt Reference

72

RED

631

12-Volt Reference

73

PNK/BLK

632

Low Reference

74

YEL/BLK

1868

Low Reference

75

BRN

436

AIR Pump Relay Control

76

YEL/BLK

625

Starter Enable Relay Control

77

--

--

Not Used

78

BRN

418

TCC PWM Solenoid Valve Control

79

--

--

Not Used

80

YEL/WHT

2868

Low Reference