GM Service Manual Online
For 1990-2009 cars only
Table 1: PCM 80-Way Blue Connector C1 Details
Table 2: PCM 80-Way Clear Connector C2 Details

PCM 80-Way Blue Connector C1 Details


Object Number: 23346  Size: CF

Connector Part Information

    • PCM 80-Way Blue C1 Details
    • Body - 1210549
    • TPA - 12160569
    • Terminals - 12084913
    • Shield - 12160921

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

1

--

--

--

--

--

--

2

--

--

--

--

--

--

3

--

--

--

--

--

--

4

Lt Blu/Blk

647

24X Reference

24X CKP Sensor B

P0336

Intermittent fault will cause the engine to misfire or cut-out

5

Blk

630

Camshaft Position PCM Input

CMP Sensor B

P0341

Intermittent fault will cause the engine to misfire or cut-out

6

Yel

400

VSS High

VSS B

P0502

Speedometer inoperative, late/harsh shifting, chuggle

7

--

--

--

--

--

--

8

Dk Grn/Wht

465

Fuel Pump Relay

Fuel Pump Relay 85

None

Stall/no start

9

Lt Blu/Wht

1747

IAC A High

IAC C

P0506/ P0507

High or low idle, stalling

10

Lt Grn/Blk

444

IAC B Low

IAC B

P0506/P0507

High or low idle, stalling

11

Lt Blu/Blk

1748

IAC A Low

IAC D

P0506/P0507

High or low idle, stalling

12

Lt Grn/Wht

1749

IAC B High

IAC A

P0506/P0507

High or low idle, stalling

13

Dk Grn

389

4K/Mi Speed

Instrument Cluster, Trip Calculator, Head-Up Display, Body Control Module, SMCC II Cruise Control Module K

None

Speedometer inoperative, Cruise Control inoperative

14

--

--

--

--

--

--

15

Tan

800

Serial Data

DLC 9

--

--

16

Gry

416

5 Volt Reference A

TP Sensor A, MAP Sensor C and EGR Valve D

P1635 P0101 P0122 P1107 P1122 P1406

Late shifting, incorrect/rough idle, stalling, surging

17

Gry

474

5 Volt Reference B

A/C Refrigerant Pressure Sensor B

P1639 P0530

A/C compressor inoperative

18

Red/Wht

812

CMP/CKP Sensor Battery Positive Voltage

CKP Sensor A, CMP Sensor A

P0336 P0341

Stall/Nostart

19

Pnk

439

Ignition Feed

Refer to Fuse Block Details

P0560

No start

20

Orn

540

Battery Feed

Refer to Fuse Block Details

P0560

No start

21

Blk/Wht

451

PCM Ground

--

None

Intermittent symptoms

22

Brn

418

TCC PWM Solenoid Driver

Transaxle Connector C

P1860

Refer to Transaxle Diagnosis

23

--

--

--

--

--

--

24

--

--

--

--

--

--

25

Brn/Wht

419

MIL Driver

Instrument Panel

P1641

No MIL, MIL ON Steady

26

--

--

--

--

--

--

27

--

--

--

--

--

--

28

Tan/Blk

422

TCC Solenoid Valve Control

Transaxle Connector D

P1864

Refer to Transaxle Diagnosis

29

Gry

435

EGR Control

EGR Valve A

P1406 P1635

Incorrect/rough idle, lack of power, chuggle

30

Dk Grn/Wht

428

EVAP Canister Purge Driver

EVAP Canister Purge Solenoid B

P1655 P0441 P1441

Rough idle

31

Dk Blu

473

High Speed Fans

Cool Fan 2 Relay 86, Cool Relay 86

P1652

High Speed Fans Only, Low Speed Fans Only

32

Dk Grn

335

Low Speed Fans

Cool Fan Relay 1 85

P1651

Low Speed Fans only, Engine Coolant fan #2 only

33

--

--

--

--

--

--

34

--

--

--

--

--

--

35

Dk Grn/Wht

459

A/C Compressor Clutch Relay Driver

A/C Compressor Relay 85

P1654

Incorrect/rough idle A/C compressor inoperative

36

--

--

--

--

--

--

37

--

--

--

--

--

--

38

--

--

--

--

--

--

39

--

--

--

--

--

--

40

--

--

--

--

--

--

41

--

--

--

--

--

--

42

--

--

--

--

--

--

43

--

--

--

--

--

--

44

Ppl/wht

430

3X Reference

ICM E

P1374

Stalls, sets DTC on restart

45

Red/Blk

453

Reference Low

ICM F

--

Intermittent Symptoms

46

--

--

--

--

--

--

47

Ppl

401

VSS Low

VSS A

P0502

Speedometer inoperative, late/harsh shifting, chuggle

48

--

--

--

--

--

--

49

--

--

--

--

--

--

50

--

--

--

--

--

--

51

--

--

--

--

--

--

52

Tan/Blk

424

Bypass

ICM A

P1361

Incorrect/rough idle, lack of power

53

Wht

423

Ignition Control (IC)

ICM B

P1350 P1361

Incorrect/rough idle, lack of power

54

Yel

492

MAF Signal

MAF Sensor A

P0101 P0102 P0103

Reduced performance

55

Dk Blu

229

Theft Deterrent Fuel Enable

BCM D16

P1626 P1629

Possible no start

56

Blk

452

Sensor Ground

ECT Sensor B, TP Sensor B, MAP Sensor A, IAT Sensor A, A/C Refrigerant Pressure Sensor A, EGR Valve B, Transaxle Connector G

P0108 P0113 P0118 P0123 P0530 P0713 P1106 P1115 P1121 P1406

Incorrect/rough idle, lack of power late/harsh shifting, chuggle, A/C compressor inoperative

57

Blk

407

CMP/CKP Sensor Ground

CMP Sensor C, CKP Sensor C

P0336 P0341

--

58

--

--

--

--

--

--

59

Ppl

1807

Class 2 Data

DLC 2

None

No scan tool data

60

Blk/Wht

451

PCM Ground

--

None

Intermittent symptoms

61

--

--

--

--

--

--

62

Dk Grn/Wht

762

A/C Request

A/C Control Head

P0530

A/C Compressor inoperative

63

--

--

--

--

--

--

64

--

--

--

--

--

--

65

--

--

--

--

--

--

66

Ppl

1986

EVAP Vacuum Switch Input

EVAP Canister Vacuum Switch B

P0441 P1442

--

67

Ppl

420

Stop Lamp Switch

Stop Lamp Switch A

P0719 P0724

Refer to Transaxle Diagnosis

68

Pnk

339

EGR Ignition

EGR Valve E, Heated Oxygen Sensor 1 D, Heated Oxygen Sensor 2 D, A/C Relay F8, Fan 2 Relay B8, EVAP Purge Solenoid Valve A, EVAP Vacuum Switch A, MAF Sensor C, IGN1-UH Fuse

P0102 P0131 P0135 P0137 P0141 P1406 P1441 P1442 P1652 P1655

Fuse blown, EGR Pintle Position error on scan tool varies excessively, A/C Inop, Rough Idle

69

Blk/Wht

771

Transaxle Range Switch D

PNP Switch 4-way conn. D

P0706

No 4th Gear, No TCC

70

Brn

1174

Engine Oil Level Switch

Engine Oil Level Switch A

--

--

71

--

--

--

--

--

--

72

Wht

776

Transaxle Range Switch P

PNP Switch 4-way conn. A

P0705

PCM defaults to D4 gear select position

73

--

--

--

--

--

--

74

--

--

--

--

--

--

75

Wht

85

Cruise Engage Status

SMCC II Cruise Control Module J

P1554

Cruise Inop

76

--

--

--

--

--

--

77

--

--

--

--

--

--

78

--

--

--

--

--

--

79

--

--

--

--

--

--

80

--

--

--

--

--

--

PCM 80-Way Clear Connector C2 Details


Object Number: 23346  Size: CF

Connector Part Information

    • PCM 80-Way Clear C2 Details
    • Body - 1210549
    • TPA - 1216056A
    • Terminals - 12084913
    • Shield - 12160921

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

1

--

--

--

--

--

--

2

--

--

--

--

--

--

3

--

--

--

--

--

--

4

--

--

--

--

--

--

5

--

--

--

--

--

--

6

--

--

--

--

--

--

7

Brn/Wht

1173

Low Oil Lamp

Instrument Panel

P1672

Low Oil Lamp ON all the time, Low Oil Lamp never ON

8

Gry

803

Change Oil Soon Indicator Control

Driver Information Display

--

Indicator Inoperative, Always On

9

Wht

121

Tach Signal

Instrument Cluster

--

Tachometer Inoperative

10

Dk/Grn

35

Hot Coolant Lamp Control

Instrument Cluster

--

Indicator Inoperative or always On

11

Lt Grn

1222

1-2 Shift Solenoid Valve Control

Transaxle Connector A

P0753

Refer to Transaxle Diagnosis

12

Lt Grn

432

Manifold Absolute Pressure Sensor

MAP Sensor B

P0107 P0108 P1106 P1107

Default Manifold Absolute Pressure and BARO

13

Dk Grn

83

Cruise Disable Driver

SMCC II Cruise Control Module H

P1662

Cruise Control inoperative

14

--

--

--

--

--

--

15

--

--

--

--

--

--

16

Brn/Wht

25

Generator Lamp

Instrument Panel

P1663

No Generator Lamp, Generator Lamp ON all the time

17

Yel/Blk

1223

2-3 Shift Solenoid Valve Control

Transaxle Connector B

P0758

Refer to Transaxle Diagnosis

18

--

--

--

--

--

--

19

--

--

--

--

--

--

20

--

--

--

--

--

--

21

Blk/Wht

451

PCM Ground

--

None

Intermittent Symptoms

22

LtBlu/Blk

844

Injector Cylinder 4

10 Way Injector Connector K

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

23

Yel

772

Transaxle Range Switch B

PNP Switch 4-way conn. B

P0705

No 4th Gear, No TCC

24

Blk/Wht

845

Injector Cylinder 5

10 Way Injector Connector J

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

25

Gry

773

Transaxle Range Switch C

Transaxle Range Switch 4-way conn. C

P0705

No 4th Gear, No TCC

26

Yel/Blk

846

Injector Cylinder 6

10 Way Injector Connector H

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

27

--

--

--

--

--

--

28

Blk

1744

Injector Cylinder 1

10 Way Injector Connector A

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

29

--

--

--

--

--

--

30

LtGrn/Blk

1745

Injector Cylinder 2

10 Way Injector Connector B

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

31

--

--

--

--

--

--

32

Pnk/Blk

1746

Injector Cylinder 3

10 Way Injector Connector C

P1200 P0300

Incorrect/Rough Idle, Missing, Flashing MIL

33

--

--

--

--

--

--

34

--

--

--

--

--

--

35

Red

225

Generator Control

Generator B

P1663

--

36

--

--

--

--

--

--

37

--

--

--

--

--

--

38

--

--

--

--

--

--

39

--

--

--

--

--

--

40

--

--

--

--

--

--

41

--

--

--

--

--

--

42

--

--

--

--

--

--

43

--

--

--

--

--

--

44

--

--

--

--

--

--

45

Ppl

412

HO2S 1 Signal

HO2S 1 B

P0131 P0132 P0134

Open Loop Fuel Control

46

Tan

413

HO2S 1 Low

HO2S 1 A

P0134

Open Loop Fuel Control

47

Ppl/Wht

1668

HO2S 2 Signal

HO2S 2 B

P0137 P0138 P0140

--

48

Tan/Wht

1669

HO2S 2 Low

HO2S 2 A

P0140

--

49

--

--

--

--

--

--

50

--

--

--

--

--

--

51

Tan

472

Intake Air Temperature Sensor

IAT Sensor B

P0112 P0113 P1111 P1112

--

52

Yel

410

Engine Coolant Temperature Sensor

ECT Sensor B

P0117 P0118 P1114 P1115

Hard Start, Incorrect/Rough Idle, Cooling Fans Commanded On

53

Dk Blu

417

Throttle Position Sensor

TP Sensor C

P0122 P0123 P1121 P1122

Late/Harsh Shifting, TPS Default

54

--

--

--

--

--

--

55

--

--

--

--

--

--

56

--

--

--

--

--

--

57

--

--

--

--

--

--

58

--

--

--

--

--

--

59

--

--

--

--

--

--

60

Blk/Wht

451

PCM Ground

--

None

Intermittent symptoms

61

--

--

--

--

--

--

62

--

--

--

--

--

--

63

Dk Blu

496

Bank 1 Knock Sensor

Knock Sensor

P0326 P0327

Default Knock Retard commanded

64

--

--

--

--

--

--

65

Brn

1456

EGR Pintle Position

EGR Valve C

P1406

Incorrect/Rough Idle, Cuts-out/Misses, Chuggles

66

--

--

--

--

--

--

67

--

--

--

--

--

--

68

--

--

--

--

--

--

69

--

--

--

--

--

--

70

--

--

--

--

--

--

71

Yel/Blk

1227

Transaxle Fluid Temperature Sensor

Transaxle Connector F

P0712 P0713

Refer to Transaxle Diagnosis

72

--

--

--

--

--

--

73

Red/Blk

380

A/C Refrigerant Pressure Sensor

A/C Refrigerant Pressure Sensor C

P0530

A/C Compressor Inoperative

74

--

--

--

--

--

--

75

--

--

--

--

--

--

76

--

--

--

--

--

--

77

--

--

--

--

--

--

78

--

--

--

--

--

--

79

--

--

--

--

--

--

80

--

--

--

--

--

--