GM Service Manual Online
For 1990-2009 cars only

PCM Connector C1


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

BLK

2762

Low Reference

2

--

--

Not Used

3

ORN

55

Fuel Gauge 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/WHT

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

470

Low Reference

13

ORN/BLK

469

Low Reference

14

--

--

Not Used

15

TAN

800

UART Serial Data [Primary]

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 Sensor 2

29

BLK

452

Low Reference

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

34-35

--

--

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

BLK

1744

Fuel Injector 1 Control

44

YEL/BLK

1223

2-3 Shift Solenoid Valve Control

45

--

--

Not Used

46

PNK/BLK

1746

Fuel Injector 3 Control

47

LT GRN/BLK

1745

Fuel Injector 2 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 (Primary)

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

--

--

Not Used

72

DK GRN

83

Cruise Control Inhibit Signal

73

BLK/WHT

845

Fuel Injector 5 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

YEL/BLK

846

Fuel Injector 6 Control

80

BLK

2751

Low Reference

PCM Connector 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

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

--

--

Not Used

10

PPL

412

HO2S High Signal Sensor 1

11

PPL/WHT

1668

HO2S High Signal Sensor 2

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

5 Volt Reference

36

GRY

803

Change Engine Oil Indicator Control

37

BLK/WHT

3113

HO2S Heater Control Sensor 1

38

--

--

Not Used

39

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

40-41

--

--

Not Used

42

LT BLU/BLK

844

Fuel Injector 4 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 [- Primary]

70

LT GRN

1867

12 Volt Reference

71

--

--

Not Used

72

RED/WHT

812

12 Volt Reference

73

BLK

808

Low Reference

74

YEL/BLK

1868

Low Reference

75

BRN

436

AIR Pump Relay Control

76-77

--

--

Not Used

78

BRN

418

TCC PWM Solenoid Valve Control

79

--

--

Not Used

80

BLK

452

Low Reference