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

PCM Connector C1


Object Number: 15026  Size: CF

Connector Part Information

    • Complete Assembly (W/O TPA) - 12191488
    • TPA (Blue) - 12176408
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1

ORN

1799

Camshaft Position Sensor Signal

2

LT BLU/WHT

1800

Crankshaft Position Sensor A Signal

3-4

--

--

Not used

5

DK GRN

890

Fuel Tank Pressure Sensor Signal

6

YEL

5

Crank Request

7-8

--

--

Not Used

9

--

--

Not Used

10

TAN

472

Intake Air Temperature (IAT) Sensor Signal

11

GRY

773

Transaxle Range Switch C Input

12

YEL

772

Transaxle Range Switch B Input

13

BLK/WHT

771

Transaxle Range Switch A Input

14

YEL/BLK

573

Crankshaft Position Sensor B Signal

15

--

--

Not Used

16

DK BLU/WHT

1231

Transaxle Input Speed Sensor Low

17

RED/BLK

1230

Transaxle Input Speed Sensor High

18

PPL

1807

Class 2 Serial Data

19

WHT

1390

PCM Ignition 0 Positive Voltage

20

ORN

240

PCM Battery Feed (B+)

21

ORN

240

PCM Battery Feed (B+)

22

RED

2127

Cylinder 7 IC Control

23

LT GRN

432

Manifold Absolute Pressure (MAP) Sensor Signal

24

--

--

Not Used

25

DK GRN

335

Low Speed Cooling Fans Control Circuit

26

DK GRN/WHT

817

Vehicle Speed Output

27

LT GRN/BLK

444

IAC B Low

28

LT GRN/WHT

1749

IAC B High

29

LT BLU/WHT

1747

IAC A High

30

LT BLU/BLK

1748

IAC A Low

31

DK GRN

676

HO2S Bank 1 Sensor 1 Heater Control Circuit High

32

BRN/WHT

419

MIL Control

33

BRN

3122

HO2S Bank 2 Sensor 1 Heater Control Circuit Low

34

TAN/BLK

464

Delivered Torque Output

35

DK GRN

83

Cruise Inhibit Output

36

--

--

Not Used

37

BLK

1744

Fuel Injector 1 Control

38

PNK/BLK

1746

Fuel Injector 3 Control

39

LT GRN

1745

Fuel Injector 2 Control

40

BLK/WHT

845

Fuel Injector 5 Control

41

WHT

776

Transaxle Range Switch Parity Input

42

YEL

492

Mass Air Flow (MAF) Sensor Signal

43

ORN/BLK

463

Requested Torque Input

44

GRY

847

Extended Travel Brake Switch Input

45-49

--

--

Not Used

50

DK BLU/WHT

1677

HO2S Bank 1 Sensor 2 Signal Low

51

DK GRN/WHT

1678

HO2S Bank 1 Sensor 2 Signal High

52

TAN

1664

HO2S Bank 1 Sensor 1 Signal Low

53

PPL/WHT

1665

HO2S Bank 1 Sensor 1 Signal High

54

TAN/WHT

1669

HO2S Bank 2 Sensor 1 Signal Low

55

PPL/WHT

1668

HO2S Bank 2 Sensor 1 Signal High

56

YEL

400

VSS Sensor Input High

57

PPL

401

VSS Sensor Input Low

58

RED

631

Camshaft Position Sensor Ignition Feed

59

PPL

1807

Class 2 Serial Data

60

BLK/WHT

451

PCM Ground

61

PPL

2121

Cylinder 1 IC Control

62

DK BLU

417

Throttle Position (TP) Sensor Signal

63

PNK

39

PCM Ignition 1 Feed

64-65

--

--

Not Used

66

GRY

429

AIR Pump Solenoid Control (If equipped

67

LT BLU/WHT

1229

Pressure Control Solenoid Low

68

BLK

3112

HO2S Bank 1 Sensor 1 Heater Control Circuit Low

69

RED/BLK

1228

Pressure Control Solenoid High

70

DK GRN/WHT

465

Fuel Pump Relay Control

71

RED

1676

EGR Valve Control

72

PPL

1490

Lift/Dive Signal Output

73

WHT

1310

EVAP Vent Solenoid Control

74

--

--

Not Used

75

GRY

436

AIR Pump A Relay Control (If equpped)

76

LT BLU/BLK

844

Fuel Injector 4 Control

77

YEL/BLK

846

Fuel Injector 6 Control

78

--

--

Not Used

79

DK BLU/WHT

878

Fuel Injector 8 Control

80

RED/BLK

877

Fuel Injector 7 Control

PCM Connector C2


Object Number: 15030  Size: CF

Connector Part Information

    • Complete Assembly (W/O TPA) - 12191488
    • TPA (Clear) - 12176409
    • Terminal - 12084913

Pin

Wire Color

Circuit No.

Function

1-2

--

--

Not Used

3

BLK/WHT

451

PCM Ground

4

BLK

2760

Intake Air Temperature (IAT) Ground

5

--

--

Not Used

6

ORN/BLK

469

Manifold Absolute Pressure (MAP) Sensor Ground

7-8

--

--

Not Used

9

YEL

2174

Reference Low (Front Bank Ignition Coil Cassette)

10

--

--

Not Used

11

BLK

2762

Transaxle Fluid Temperature (TFT) Sensor Ground

12

BLK

2753

EGR Pintle Position Sensor Ground

13

BLK

2759

Fuel Level Sensor and Fuel Tank Pressure Sensor Ground

14

BLK

2751

AC Pressure Sensor Ground

15

BLK/WHT

451

PCM Ground

16

--

--

Not Used

17

GRY

2709

5 Volt Reference B - Fuel Tank Pressure Sensor Feed

18

--

--

Not Used

19

DK BLU

496

Knock Sensor Signal

20

TAN/BLK

231

Engine Oil Pressure Switch Input

21

LT BLU

2123

Cylinder 3 IC Control

22

RED/WHT

2122

Cylinder 2 IC Control

23

BRN

1174

Engine Oil Level Switch Input

24

LT BLU/BLK

396

Cruise Engaged Input

25

LT GRN

2867

Crankshaft Position Sensor B Ignition Feed

26

BLK/WHT

451

PCM Ground

27

--

--

Not Used

28

YEL

2868

Crankshaft Position Sensor B Ground

29-30

--

--

Not Used

31

YEL

410

Engine Coolant Temperature (ECT) Sensor Signal

32

YEL/BLK

1227

Transaxle Fluid Temperature (TFT) Sensor Signal

33-34

--

--

Not Used

35

GRY

1716

Knock Sensor Ground

36

--

--

Not Used

37

RED

1226

Transaxle Pressure Manifold Switch C Input

38-39

--

--

Not Used

40

RED

225

Generator L Terminal Control

41

--

--

Not Used

42

DK GRN/WHT

428

EVAP Canister Purge Valve Control

43

LT GRN

1222

Shift 1-2 Solenoid Valve Control

44

YEL

447

Starter Relay Control

45

YEL/BLK

1223

Shift 2-3 Solenoid Valve Control

46

TAN/BLK

422

Torque Converter Clutch (TCC) Control

47

DK GRN/WHT

459

A/C Compressor Clutch Relay Control

48

BLK/WHT

1423

HO2S Bank 1 Sensor 2 Heater Control Circuit Low

49

GRY

2704

5 Volt Reference A - MAP Sensor Feed

50

GRY

2702

5 Volt Reference A - EGR Pintle Position Sensor Feed

51

GRY

2701

5 Volt Reference A - TP Sensor Feed

52

BRN

1456

EGR Pintle Position Sensor Signal

53

--

--

Not Used

54

GRN

1408

Air Pump 2 Relay Control (If equipped)

55

DK BLU

473

High Speed Cooling Fans Control

56

WHT

121

Tachometer Output

57

GRY

2700

5 Volt Reference B - A/C Pressure Sensor Feed

58

--

--

Not Used

59

DK GRN/WHT

2124

Cylinder 4 IC Control

60

LT BLU/WHT

2126

Cylinder 6 IC Control

61

PPL/WHT

2128

Cylinder 8 IC Control

62

DK GRN

2125

Cylinder 5 IC Control

63-64

--

--

Not Used

65

LT GRN

1867

Crankshaft Position Sensor A Ignition Feed

66

YEL/BLK

1868

Crankshaft Position Sensor A Ground

67

PNK/BLK

632

Camshaft Position Sensor Ground

68

BLK

2761

Engine Coolant Temperature (ECT) Sensor Ground

69

BLK

2752

Throttle Position (TP) Sensor Ground

70

GRY

435

EGR Valve Control Ground

71

GRY

2175

Reference Low (Rear Bank Ignition Coil Cassette)

72

PPL

1589

Fuel Level Sensor Signal

73

PNK

1224

Transaxle Pressure Manifold Switch A Input

74

RED/BLK

380

A/C Pressure Sensor Signal

75-78

--

--

Not Used

79

GRY

23

Generator F Terminal Feedback

80

PPL

420

Torque Converter Clutch (TCC) Brake Switch Input