GM Service Manual Online
For 1990-2009 cars only

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

--

--

Not Used

3

ORN

55

Fuel Gage Signal

4

LT GRN

1222

1-2 Shift Solenoid Valve Control

5

DK BLU

473

High Speed Cooling Fan Relay Control

6

DK GRN

335

Low Speed Cooling Fan Relay Control

7

BLK

630

Camshaft Position Signal

8

PPL/WHT

430

Low Resolution Engine Speed Signal

9

LT BLU/BLK

647

Medium Resolution Engine Speed Signal

10

GRY

2704

5 Volt Reference

11

--

--

Not Used

12

BLK

2761

Low Reference

13

ORN/BLK

469

Low Reference

14

--

--

Not Used

15

TAN

800

UART Serial Data

16

BLK/WHT

451

Ground

17

BLK

2760

Low Reference

18

--

--

Not Used

19

PNK

439

Ignition 1 Voltage

20

ORN

540

Battery Positive Voltage

21

--

--

Not Used

22

PNK

1224

Transmission Fluid Pressure Switch Signal A

23-27

--

--

Not Used

28

TAN/WHT

1669

HO2S Low Signal

29

TAN

413

HO2S Low Signal

30

PPL

420

TCC Brake Switch Signal

31

BLK

2753

Low Reference

32

RED

1676

EGR Solenoid Low Control

33

DK BLU

496

KS 1 Signal

34

LT BLU

1876

KS 2 Signal

35

--

--

Not Used

36

BRN

25

Charge Indicator Control

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 Valve Control

45

PNK/BLK

429

AIR Solenoid Control (L36)

46

LT BLU/BLK

844

Fuel Injector 4 Control

47

BLK/WHT

845

Fuel Injector 5 Control

48

RED/BLK

453

Low Reference

49-52

--

--

Not Used

53

TAN/BLK

424

IC Timing Signal

54

WHT

423

IC Timing Control

55

DK GRN

389

Vehicle Speed Signal

56

BLK/WHT

451

Ground

57

BLK/WHT

451

Ground

58

--

--

Not Used

59

PPL

1807

Class 2 Serial Data

60

BLK/WHT

451

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

Signal High - Front

65

PPL

401

Signal Low - Front

66-67

--

--

Not Used

68

YEL

772

Transmission Range Switch Signal B

69

YEL

492

MAF Sensor Signal

70

DK BLU

229

Fuel Enable Control

71

ORN/BLK

463

Requested Torque Signal (L67)

72

DK GRN

83

Cruise Control Inhibit Signal

73

LT GRN/BLK

1745

Fuel Injector 2 Control

74

--

--

Not Used

75

DK GRN

35

Coolant Temperature Indicator Control

76

DK GRN/

WHT

428

EVAP Canister Purge Solenoid Control

77-78

--

--

Not Used

79

BLK

1744

Fuel Injector 1 Control

80

BLK

2751

Low Reference

PCM, C2


Object Number: 73173  Size: CH

Connector Part Information

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

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

4

GRY/BLK

435

EGR Solenoid High Control

5

BRN/WHT

419

MIL Control

6

BRN/WHT

1173

Low Oil Level Indicator Control

7

LT BLU/WHT

1747

IAC Coil A High Control

8

WHT

121

Engine Speed Signal

9

TAN/BLK

464

Delivered Torque Signal (L67)

10

PPL

412

HO2S High Signal

11

PPL/WHT

1668

HO2S High Signal

12-15

--

--

Not Used

16

WHT

776

Transmission Range Switch Signal P

17

RED

1226

Transmission Fluid Pressure Switch Signal C

18

BLK/WHT

771

Transmission Range Switch Signal A

19-21

--

--

Not Used

22

DK GRN/

WHT

762

A/C Request Signal

23-24

--

--

Not Used

25

LT GRN

432

MAP Sensor Signal

26

YEL

410

ECT Sensor Signal

27

RED/BLK

380

A/C Refrigerant Pressure Sensor Signal

28

BRN

1456

EGR Valve Position Signal

29

--

--

Not Used

30

GRY

2702

5 Volt Reference

31

--

--

Not Used

32

GRY

2709

5 Volt Reference

33

GRY

2701

5 Volt Reference

34

GRY

2700

5 Volt Reference

35

BLK

2759

Low Reference

36

GRY

803

Change Engine Oil Indicator Control

37-38

--

--

Not Used

39

DK GRN/

WHT

459

A/C Compressor 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 Control

45

RED/BLK

1228

PC Solenoid Valve High Control (Sol. A)

46

LT BLU/WHT

1229

PC Solenoid Valve Low Control (Sol. A)

47-48

--

--

Not Used

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

WHT

85

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

70-74

--

--

Not Used

75

BRN

436

AIR Pump Relay Control (L36)

76

--

--

Not Used

77

GRY

1724

Boost Control Solenoid Control (L67)

78

BRN

418

TCC PWM Solenoid Valve Control

79-80

--

--

Not Used