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

Powertrain Control Module (PCM) C1


Object Number: 655733  Size: CH

Connector Part Information

  • OEM: 12191489
  • Service: 12167308
  • Description: 80-Way F Micro-Pack 100W Sealed (BU)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Powertrain Control Module (PCM) C1

Pin

Wire Color

Circuit No.

Function

1

BK/WH

351

Ground

2

L-GN

1867

12-Volt Reference

3

PK/BK

1746

Fuel Injector 3 Control

4

L-GN/BK

1745

Fuel Injector 2 Control

5-6

--

--

Not Used

7

GY

705

5-Volt Reference

8-10

--

--

Not Used

11

L-BU

1876

KS 2 Signal

12

D-BU/WH

1869

CKP Sensor Signal

13

OG/BK

463

Requested Torque Signal

14

OG/BK

1061

UART Serial Data (Secondary)

15

D-BU/WH

774

UART Serial Data (Tertiary)

16-18

--

--

Not Used

19

PK

439

Ignition 1 Voltage

20

OG

440

Battery Positive Voltage

21

YE/BK

1868

Low Reference

22

L-GN

488

PTO On Switch-Signal

23

BK

470

Low Reference

24

BK/WH

251

Ground

25

--

--

Not Used

26

TN

1667

HO2S Low Signal - Bank 2 Sensor 1

27

BK/WH

251

Ground

28

--

--

Not Used

29

TN

1664

HO2S Low Signal - Bank 1 Sensor 1

30

L-GN

1478

Coolant Level Switch Signal

31

D-GN

534

High Idle Switch Signal

32

BK/WH

771

Transmission Range Switch Signal A (Allison® MD)

33

PU

420

TCC Brake Switch/Cruise Control Release Signal

34

OG/BK

1786

Park/Neutral (A/T)

35

BN/WH

379

CPP Switch Signal (Manual Transmission)

36

BK

1744

Fuel Injector 1 Control

37

YE/BK

846

Fuel Injector 6 Control

38

--

--

Not Used

39

YE

447

Starter Relay Coil Control

40

BK/WH

351

Ground

41

PU

719

Low Reference (Manual Transmission)

42

--

--

Not Used

43

RD/BK

877

Fuel Injector 7 Control

44

L-BU/BK

844

Fuel Injector 4 Control

45-47

--

--

Not Used

48

GY

597

5-Volt Reference

49-50

--

--

Not Used

51

D-BU

496

KS 1 Signal

52

YE

2522

PTO Engage Signal

53

--

--

Not Used

54

OG/BK

469

Low Reference

55-56

--

--

Not Used

57

OG

440

Battery Positive Voltage

58

D-GN

1049

ECM/PCM/VCM Class 2 Serial Data

59-60

--

--

Not Used

61

PK/BK

632

Low Reference

62

--

--

Not Used

63

BK

407

Low Reference

64-65

--

--

Not Used

66

PU

1666

HO2S High Signal - Bank 2 Sensor 1

67-68

--

--

Not Used

69

PU/WH

1665

HO2S High Signal - Bank 1 Sensor 1

70

BN

1174

Oil Level Switch Signal

71

L-BU

494

Primary Brake Indicator Control

72

YE

772

Transmission Range Switch Signal B (Allison® MD)

73

BN/WH

633

CMP Sensor Signal

74

YE

410

ECT Sensor Signal

75

PK

1020

Off/Run/Crank Voltage

76

BK/WH

845

Fuel Injector 5 Control

77

D-BU/WH

878

Fuel Injector 8 Control

78

PU

2562

PTO Control

79

--

--

Not Used

80

GY

720

Low Reference

Powertrain Control Module (PCM) C2


Object Number: 684875  Size: CH

Connector Part Information

  • OEM: 12191488
  • Service: 12167308
  • Description: 80-Way F Micro-Pack 100W Sealed (GN)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Powertrain Control Module (PCM) C2

Pin

Wire Color

Circuit No.

Function

1

BK/WH

351

Ground

2

WH

2467

Crankshaft Sensor Supply Voltage (Allison® MD)

3

TN

1465

Fuel Pump Relay Control - Secondary

4

--

--

Not Used

5

TN/BK

464

Delivered Torque Signal (Allison® MD)

6-7

--

--

Not Used

8

--

--

Not Used

9

D-GN/WH

465

Fuel Pump Relay Control - Primary

10

WH

121

Engine Speed Signal

11-14

--

--

Not Used

15

BN

25

Charge Indicator Control

16

--

--

Not Used

17

D-GN/WH

762

A/C Request Signal

18

--

--

Not Used

19

GY/BK

1467

Air Shift Switch Signal (Allison® MD)

20

D-GN

2222

Signal Low - Rear

21

--

--

Not Used

L-BU

2221

Signal High - Rear

22-23

--

--

Not Used

24

--

--

Not Used

25

TN

472

IAT Sensor Signal

26

PU

2121

IC 1 Control

27

RD

2127

IC 7 Control

28

L-BU/WH

2126

IC 6 Control

29

D-GN/WH

2124

IC 4 Control

30

--

--

Not Used

31

YE

492

MAF Sensor Signal

32

L-GN

432

MAP Sensor Signal

33

--

--

Not Used

34

D-GN/WH

428

EVAP Canister Purge Solenoid Control

35-38

--

--

Not Used

39

RD

631

12-Volt Reference

40

BK/WH

351

Ground

41-42

--

--

Not Used

43

D-GN/WH

459

A/C Compressor Clutch Relay Control

44

RD

2013

High Idle Indicator Control

45

--

--

Not Used

46

BN/WH

419

MIL Control

47-48

--

--

Not Used

49

YE/BK

1827

Vehicle Speed Signal

50

D-GN/W

817

Vehicle Speed Signal

51-53

--

--

Not Used

54

PU

1589

Fuel Level Sensor Signal - Primary

55

D-GN

603

Low Coolant Indicator Control

56

--

--

Not Used

57

BK

552

Low Reference

58

TN/WH

332

Oil Pressure Sensor Signal

59

D-GN

1433

PNP/Clutch Start Switch Signal

60

BN

2129

Low Reference

61

BN/WH

2130

Low Reference

62

GY

773

Transmission Range Switch Signal C (Allison® MD)

63-65

--

--

Not Used

66

PU/WH

2128

IC 8 Control

67

RD/WH

2122

IC 2 Control

68

D-GN

2125

IC 5 Control

69

L-BU

2123

IC 3 Control

70-71

--

--

Not Used

72

BK/WH

3213

HO2S Heater High Control - Bank 2 Sensor 1

73

D-BU

1936

Fuel Level Sensor Signal - Secondary

74

L-GN

3212

HO2S Heater Low Control - Bank 2 Sensor 1

75

GY

23

Generator Field Duty Cycle Signal

76-80

--

--

Not Used