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

PCM Connector C1 (BLU)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C1 Assembly 12191489
    • TPA (BLU) 12176408
    • Connector Cover 12191108

Pin

Wire Color

Circuit No.

Function

1

BLK

1650

PCM Ground

2

--

--

Not Used

3

DK BLU/WHT

878

Injector 8 Control

4

PNK/BLK

1746

Injector 3 Control

5

--

--

Not Used

6

RED

RRS1

Rough Road Sensor Signal

7

GRY

RRS2

Rough Road 5V Reference

8

GRY

596

TP Sensor 5V Reference

9-11

--

--

Not Used

12

PPL/WHT

438

4X Reference High Input

13-15

--

--

Not Used

16

BLU/BLK

647

24X Spark Reference

17-18

--

--

Not Used

19

PNK

439

Ignition Positive Voltage

20

ORN

340

Battery Positive Voltage

21-22

--

--

Not Used

23

BLK

720

Fuel Tank Pressure Sensor/Fuel Tank Sender Ground

24

--

--

Not Used

25

TAN

1671

HO2S Signal Low Bank 2 Sensor 2

26

TAN

1667

HO2S Signal Low Bank 2 Sensor 1

27

--

--

Not Used

28

TAN/WHT

1669

HO2S Signal Low Bank 1 Sensor 2

29

TAN/WHT

1653

HO2S Signal Low Bank 1 Sensor 1

30-31

 

--

Not Used

32

GRY

48

Clutch Pedal Position Switch Signal

33-35

--

--

Not Used

36

BLK

1744

Injector 1 Control

37

LT BLU/BLK

844

Injector 4 Control

38-39

--

--

Not Used

40

BLK

1650

PCM Ground

41

--

--

Not Used

42

DK GRN

335

Engine Cooling Fan Relay 1 Control

43

RED/BLK

877

Injector 7 Control

44

YEL/BLK

846

Injector 6 Control

45

--

--

Not Used

46

GRY

474

Fuel Tank Pressure Sensor 5V Reference

47

--

--

Not Used

48

GRY

416

MAP Sensor 5V Reference

49-50

--

--

Not Used

51

DK BLU

496

Knock Sensor Signal Front

52

--

--

Not Used

53

BLK

RRS3

Rough Road Sensor Ground

54

BLK

487

MAP Sensor Ground

55

--

--

Not Used

56

--

--

Not Used

57

ORN

340

Battery Positive Voltage

58

DK GRN

1849

Serial Data

59

--

--

Not Used

60

BLK

452

TP Sensor Ground

61-64

--

--

Not Used

65

PPL

1670

HO2S Signal High Bank 2 Sensor 2

66

PPL

1666

HO2S Signal High Bank 2 Sensor 1

67

--

--

Not Used

68

PPL/WHT

1668

HO2S Signal High Bank 1 Sensor 2

69

PPL/WHT

1665

HO2S Signal High Bank 1 Sensor 1

70-72

--

--

Not Used

73

BLK

638

Camshaft Position (CMP) Sensor Signal

74

YEL

418

Engine Coolant Temperature (ECT) Sensor Signal

75

--

--

Not Used

76

BLK/WHT

845

Injector 5 Control

77

LT GRN/BLK

1745

Injector 2 Control

78-79

--

--

Not Used

80

BLK

407

Engine Coolant Temperature (ECT) Sensor Ground

PCM Connector C2 (RED)


Object Number: 23346  Size: CF

Connector Part Information

    • PCM Connector C2 Assembly 12191488
    • TPA (RED) 12176410
    • Connector Cover 12191108

Pin

Wire Color

Circuit No.

Function

1

BLK

1650

PCM Ground

2-8

--

--

Not Used

9

DK GRN/WHT

465

Fuel Pump Relay Control

10

WHT

121

Engine Speed (Tach) Output Signal

11-14

--

--

Not Used

15

RED

225

Alternator L Terminal

16

--

--

Not Used

17

DK GRN/YE

762

A/C Request Signal

18

--

--

Not Used

19

--

--

Not Used

20

LT GRN/BLK

822

Vehicle Speed Sensor (VSS) Reference Low

21

PPL/WHT

821

Vehicle Speed Sensor (VSS) Signal

22-23

--

--

Not Used

24

DK BLU

417

TP Sensor Signal

25

TAN

472

IAT Sensor Signal

26

WHT

423

Ignition Control 1

27-30

--

--

Not Used

31

YEL

492

MAF Sensor Signal

32

LT GRN

432

MAP Sensor Signal

33

DK BLU

473

Engine Cooling Fan Relay 2 and 3 Control

34

DK GRN/WHT

428

EVAP Canister Purge Valve Control

35-37

--

--

Not Used

38

DK BLU

1936

Fuel Gauge Output Control

39

--

--

Not Used

40

BLK

1650

PCM Ground

41-42

--

--

Not Used

43

DK GRN/WHT

459

A/C Clutch Relay Control

44

--

--

Not Used

45

WHT

1310

EVAP Canister Vent Valve Control

46

BRN/WHT

419

Malfunction Indicator Lamp (MIL) Control

47-49

--

--

Not Used

50

DK GRN/WHT

817

Vehicle Speed Output Circuit

51-53

--

--

Not Used

54

PPL

1589

Fuel Level Sensor Signal

55

DK GRN

603

A/C Pressure Cycling Switch Signal

56

--

--

Not Used

57

PPL

719

IAT Sensor Ground

58-59

--

--

Not Used

60

RED/BLK

453

Ignition Control Reference Low Bank

61-63

--

--

Not Used

64

DK GRN

890

Fuel Tank Pressure Sensor Signal

65

--

--

Not Used

66

TAN/BLK

2128

Bypass

67-75

--

--

Not Used

76

LT GRN/WHT

1749

IAC Coil B High

77

LT GRN/BLK

444

IAC Coil B Low

78

LT BLU/BLK

1748

IAC Coil A Low

79

LT BLU/WHT

1747

IAC Coil A High

80

--

--

Not Used