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

Powertrain Control Module (PCM) C1


Object Number: 784851  Size: CH

Connector Part Information

    • 15359378
    • 56-Way F Micro 64 Series Sealed (BU)

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Available

4

L-BU

20

Stop Lamp Switch Signal (A/T)

5

--

--

Not Available

6

TN/BK

464

Delivered Torque Signal (ABS)

7

GY

720

Low Reference

8-10

--

--

Not Available

11

BK

2759

Low Reference

12-14

--

--

Not Available

15

PU

1807

Class 2 Serial Data

16

PU

1807

Class 2 Serial Data

17

--

--

Not Available

18

PU

1500

Ignition 0 Voltage

19

PK

839

Ignition 1 Voltage

20

OG

480

Battery Positive Voltage

21

TN

472

IAT Sensor Signal

22

PU

30

Fuel Level Sensor Signal

23

GY

596

5-Volt Reference

24

--

--

Not Available

25

GY

2709

5-Volt Reference

26-29

--

--

Not Available

30

D-BU

473

High Speed Cooling Fan Signal

31

--

--

Not Used

32

WH

121

Engine Speed Signal (ABS)

33

--

--

Not Available

34

D-GN/WH

817

Vehicle Speed Signal

35

OG/BK

463

Requested Torque Signal (ABS)

36

--

--

Not Available

37

RD/BK

380

A/C Refrigerant Pressure Sensor Signal

38

--

--

Not Available

39

D-GN

890

Fuel Tank Pressure Sensor Signal

40-42

--

--

Not Available

43

D-GN

335

Low Speed Cooling Fan Signal

44

--

--

Not Available

45

WH

1310

EVAP Canister Vent Solenoid Control

46

D-GN/WH

465

Fuel Pump Relay Control

47

D-GN/WH

459

A/C Compressor Clutch Relay Control

48

--

--

Not Available

49

D-GN

83

Cruise Control Inhibit Signal

50

--

--

Not Available

51

BK

552

Low Reference

52-56

--

--

Not Available

Powertrain Control Module (PCM) C2


Object Number: 784850  Size: CH

Connector Part Information

    • 15359382
    • 73-Way F Micro 64/GT 280 Series Sealed (BK)

Pin

Wire Color

Circuit No.

Function

1

L-BU/BK

1748

IAC Coil A Low Control

2

L-BU/WH

1747

IAC Coil A High Control

3-4

--

--

Not Available

5

D-GN/WH

428

EVAP Canister Purge Solenoid Control

6

RD/BK

1228

PC Solenoid Valve High Control

7

L-BU/WH

1229

PC Solenoid Valve Low Control

8

--

--

Not Available

9

--

--

Not Used

10

L-GN

1222

1-2 Shift Solenoid Valve Control

11

YE/BK

1223

2-3 Shift Solenoid Valve Control

12

BN

418

TCC PWM Solenoid Valve Control

13

PU/WH

1668

HO2S High Signal

14

TN/WH

1669

HO2S Low Signal

15

TN

1667

HO2S Low Signal

16

PU

1666

HO2S High Signal

17

L-GN/WH

1749

IAC Coil B High Control

18

L-GN/BK

444

IAC Coil B Low Control

19

WH

423

IC Timing Control

20

OG

406

IC Timing Control [B]

21-25

--

--

Not Available

26

BN/WH

633

Camshaft Position Signal

27

YE

573

CKP Sensor Signal

28

PU

574

Low Reference

29

L-GN

432

MAP Sensor Signal

30

--

--

Not Available

31

D-BU

417

TP Sensor Signal

32-33

--

--

Not Available

34

WH

776

Transmission Range Switch Signal P

35

GY

773

Transmission Range Switch Signal C

36

YE

772

Transmission Range Switch Signal B

37

BK/WH

771

Transmission Range Switch Signal A

38

BK

514

Ground

39

BK

2761

Low Reference

40

BK

407

Low Reference

41

D-BU/WH

1231

AT ISS Low Signal

42

PU

401

VSS Low Signal

43

--

--

Not Available

44

GY

1716

Low Reference

45

OG/BK

469

Low Reference

46

--

--

Not Available

47

BK

2752

Low Reference

48

--

--

Not Available

49

GY

23

Generator Field Duty Cycle Signal

50

RD

225

Generator Turn On Signal

51

BK

1744

Fuel Injector 1 Control

52

L-GN/BK

1745

Fuel Injector 2 Control

53

L-BU/BK

396

Cruise Control Engaged Signal

54

TN/WH

231

Oil Pressure Switch Signal

55

--

--

Not Used

56

D-BU

1225

Transmission Fluid Pressure Switch Signal B

57

RD

1226

Transmission Fluid Pressure Switch Signal C

58

YE

657

TCC Release Switch Signal

59

YE

410

ECT Sensor Signal

60

YE/BK

1227

TFT Sensor Signal

61

RD/BK

1230

AT ISS High Signal

62

YE

400

VSS High Signal

63

--

--

Not Available

64

D-BU

496

Knock Sensor [1] Signal

65

GY

2704

5-Volt Reference

66

--

--

Not Available

67

GY

2701

5-Volt Reference

68

--

--

Not Available

69

D-GN

676

HO2S Heater Low Control

70

BK/WH

1423

HO2S Heater Low Control

71

L-BU/BK

844

Fuel Injector 4 Control

72

PK/BK

1746

Fuel Injector 3 Control

73

BK/WH

451

Ground