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

Powertrain Control Module (PCM) C1 Connector


Object Number: 655733  Size: CH

Connector Part Information

    • 12191110 Connector
    • 12176408 Retainer (BLU)
    • 80 Way Micro-Pack 100W Series, Sealed (NAT)

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

Ground

2

LT GRN

1867

12 Volt Reference

3

PNK/BLK

1746

Fuel Injector 3 Control

4

LT GRN/BLK

1745

Fuel Injector 2 Control

5-6

--

--

Not Used

7

GRY

705

5 Volt Reference

8-10

--

--

Not Used

11

LT BLU

1876

KS 2 Signal

12

DK BLU/WHT

1869

CKP Sensor Signal

13

ORN/BLK

463

Requested Torque Signal (MX4/MTW)

13

--

--

Not Used (w/o MX4/MTW)

14

ORN/BLK

1061

UART Serial Data - Secondary

15

DK BLU/WHT

774

UART Serial Data - Tertiary

16-18

--

--

Not Used

19

PNK

439

Ignition 1 Voltage

20

ORN

1040

Battery Positive Voltage

21

YEL/BLK

1868

Low Reference

22-25

--

--

Not Used

26

TAN

413

HO2S Low Signal

27-28

--

--

Not Used

29

TAN

413

HO2S Low Signal

30

YEL/BLK

68

Low Coolant Level Indicator Control

31

DK GRN

534

High Idle Switch Output

32

BLK/WHT

771

Transmission Range Switch Signal A (MX4/MTW)

32

--

--

Not Used (w/o MX4/MTW)

33

PPL

420

TCC Brake Switch Signal

34

ORN/BLK

434

Neutral Safety Switch Signal (w/o MX4/MTW)

34

WHT

776

Transmission Range Switch Signal P (MX4/MTW)

35

BRN/WHT

379

CPP Switch Signal

36

BLK

1744

Fuel Injector 1 Control

37

YEL/BLK

846

Fuel Injector 6 Control

38

GRY

803

Change Engine Oil Indicator Control

39

YEL

447

Starter Relay Coil Control

40

BLK/WHT

451

Ground

41

PPL

719

Low Reference

42

DK BLU

527

Engine Shutdown Alarm Signal

43

RED/BLK

877

Fuel Injector 7 Control

44

LT BLU/BLK

844

Fuel Injector 4 Control

45-46

--

--

Not Used

47

GRY

596

5 Volt Reference

48

GRY

597

5 Volt Reference

49-50

--

--

Not Used

51

DK BLU

496

KS 1 Signal

52-53

--

--

Not Used

54

ORN/BLK

469

Low Reference

55

BRN

1456

EGR Valve Position Signal

56

--

--

Not Used

57

ORN

1040

Battery Positive Voltage

58

DK GRN

1049

PCM Class 2 Serial Data

59

DK GRN

1049

PCM Class 2 Serial Data (MX4/MTW)

59

--

--

Not Used (w/o MX4/MTW)

60

TAN

413

HO2S Low Signal

61

PNK/BLK

632

Low Reference

62

--

--

Not Used

63

BLK

407

Low Reference

64-65

--

--

Not Used

66

PPL

1666

HO2S High Signal-Bank 2 Sensor 1

67-68

--

--

Not Used

69

PPL/WHT

1665

HO2S High Signal-Bank 1 Sensor 1

70-71

--

--

Not Used

72

YEL

772

Transmission Range Switch Signal B (MX4/MTW)

72

--

--

Not Used (w/o MX4/MTW)

73

BRN/WHT

633

CMP Sensor Signal

74

YEL

410

ECT Sensor Signal

75

--

--

Not Used

76

BLK/WHT

845

Fuel Injector 5 Control

77

DK BLU/WHT

878

Fuel Injector 8 Control

78-79

--

--

Not Used

80

GRY

720

Low Reference

Powertrain Control Module (PCM) C2 Connector


Object Number: 655733  Size: CH

Connector Part Information

    • 12191110 Connector
    • 12176410 Retainer (RED)
    • 80 Way Micro-Pack 100W Series, Sealed (NAT)

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

451

Ground

2

WHT

2467

Compare Torque/Torque Requested Signal (MX4/MTW)

2

--

--

Not Used (w/o MX4/MTW)

3-4

--

--

Not Used

5

TAN/BLK

464

Delivered Torque Signal (MX4/MTW)

5

--

--

Not Used (w/o MX4/MTW)

6

--

--

Not Used

7

RED

1676

EGR Valve Supply Voltage

8

--

--

Not Used

9

DK GRN/WHT

465

Fuel Pump Relay Control

10

WHT

121

Engine Speed Signal

11-14

--

--

Not Used

15

RED

225

Generator Turn On Signal

16-18

--

--

Not Used

19

GRY

1467

Air Shift Switch Signal (HR1/HR2)

19

GRY

1467

Shift Motor Relay Control (HPZ)

20

LT GRN/BLK

822

VSS Low Signal (w/o MX4/MTW)

20

--

--

Not Used (MX4/MTW)

21

PPL/WHT

821

VSS High Signal (w/o MX4/MTW)

21

YEL

400

Signal High - Front (MX4/MTW)

22-24

--

--

Not Used

25

TAN

472

IAT Sensor Signal

26

PPL/WHT

2121

IC 1 Control

27

RED

2127

IC 7 Control

28

LT BLU/WHT

2126

IC 6 Control

29

DK GRN/WHT

2124

IC 4 Control

30

--

--

Not Used

31

YEL

492

MAF Sensor Signal

32

LT GRN

432

MAP Sensor Signal

33

LT BLU

1377

Check Gauges Indicator Control

34

DK GRN/WHT

428

EVAP Canister Purge Solenoid Control

35

BRN

25

Charge Indicator Control

36

--

--

Not Used

37

WHT/BLK

499

Reduced Engine Power Indicator Control

38

BRN

445

Oil Pressure Gauge Signal

39

RED

631

12 Volt Reference

40

BLK/WHT

451

Ground

41

GRY

435

EGR Solenoid Control

42

GRY

324

Shift Relay Coil Supply Voltage

43

--

--

Not Used

44

RED

2013

High Idle Indicator Control

45

--

--

Not Used

46

BRN/WHT

419

MIL Control

47

DK BLU

1938

Engine Overspeed Indicator Control

48

--

--

Not Used

49

PPL

2817

VSS

50

DK GRN/WHT

817

Vehicle Speed Signal

51

--

--

Not Used

52

GRY

23

Generator Field Duty Cycle Signal

53-56

--

--

Not Used

57

BLK

552

Low Reference

58

TAN/WHT

332

EOP Sensor Signal

59

PPL

806

Crank Voltage

60

BRN

2129

Low Reference

61

BRN/WHT

2130

Low Reference

62

GRY

773

Transmission Range Switch Signal C (MX4/MTW)

62

--

--

Not Used (w/o MX4/MTW)

63-65

--

--

Not Used

66

PPL/WHT

2128

IC 8 Control

67

RED/WHT

2122

IC 2 Control

68

DK GRN

2125

IC 5 Control

69

LT BLU

2123

IC 3 Control

70-73

--

--

Not Used

74

LT GRN/WHT

3213

HO2S Heater Power

75-79

--

--

Not Used

80

LT GRN

3212

HO2S Heater Ground