GM Service Manual Online
For 1990-2009 cars only

Engine Control Module Connector End Views Without Electronic Throttle Control

Table 1: Engine Control Module (ECM) C1
Table 2: Engine Control Module (ECM) C2

Engine Control Module (ECM) C1


Object Number: 1497745  Size: CF

Connector Part Information

    • AMP 368376
    • 81-Way F 81POS Receptacle Hsg Assembly (BK)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BK

251

Ground

3

D-BU

426

Idle Motor Feed

4

OG

440

Battery Positive Voltage

5

OG/BK

425

Idle Motor Return

6

D-GN

817

Vehicle Speed Signal

7

D-BU/BK

480

Rough Road Signal

8

PU/WH

1665

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Signal

9

D-GN/WH

1664

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Signal

10

YE

492

Mass Air Flow (MAF) Sensor Signal

11

D-GN/WH

1456

Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal

12

L-GN

432

Manifold Absolute Pressure (MAP) Sensor Signal

13

RD/BK

380

A/C Pressure Sensor Signal

14-16

--

--

Not Used

17

D-BU/WH

1936

Fuel Level Sensor Signal

18

BN/WH

633

Camshaft Position (CMP) Sensor Signal

19

D-BU/WH

1869

Crankshaft Position (CKP) Signal

20

--

--

Not Used

21

RD

427

Idle Switch Position

22

WH/BK

1922

CAN Serial Data Low

23

D-GN/BK

2905

Serial Data

24

D-BU/BK

844

Fuel Injector 4 Control

25

D-GN/WH

762

A/C Request Signal

26

PU

1666

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Signal

27

D-GN

1663

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Signal

28

D-BU/WH

417

Idle Motor Position Signal

29

D-GN

534

Throttle Position (TP) Sensor Signal

30

--

--

Not Used

31

BN

472

Intake Air Temperature (IAT) Sensor Signal

32-35

--

--

Not Used

36

YE

410

Engine Coolant Temperature (ECT) Sensor Signal

37

--

--

Not Used

38

YE/BK

1868

Low Reference

39

--

--

Not Used

40

WH/BK

448

Keyword Serial Data

41

YE/BK

1921

CAN Serial Data High

42

YE/BK

846

Fuel Injector 6 Control

43

L-GN/BK

1745

Fuel Injector 2 Control

44

BK/WH

1057

Shield Ground

45-47

--

--

Not Used

48

GY/BK

469

5-Volt Reference

49

GY

416

5-Volt Reference

50

GY

474

5-Volt Reference

51

GY/BK

605

Low Reference

52

D-GN

890

Fuel Tank Pressure (FTP) Sensor Signal

53-59

--

--

Not Used

60

GY/BK

435

Exhaust Gas Recirculation (EGR) Solenoid Control

61

D-BU/WH

845

Fuel Injector 5 Control

62

BK

1744

Fuel Injector 1 Control

63

D-BU/WH

1876

Knock Sensor 2 Signal

64

WH

496

Knock Sensor 1 Signal

65

BK

470

Low Reference

66

D-BU/BK

650

Low Reference

67

BK

750

Low Reference

68

L-BU/BK

808

Low Reference

69

YE/BK

452

Low Reference

70

D-BU/BK

632

Low Reference

71

BK/WH

645

Low Reference

72-75

--

--

Not Used

76

GN

1704

Low Reference

77

--

--

Not Used

78

BK/WH

251

Ground

79

PK/D-BU

539

Ignition 1 Voltage

80

D-GN/WH

428

EVAP Canister Purge Valve Solenoid Control

81

RD/BK

1746

Fuel Injector 3 Control

Engine Control Module (ECM) C2


Object Number: 1497768  Size: CF

Connector Part Information

    • AMP 368383
    • 40-Way F 40POS Receptacle Hsg Assembly (BK)

Pin

Wire Color

Circuit No.

Function

82

--

--

Not Used

83

BK/WH

251

Ground

84

--

--

Not Used

85

D-GN

135

Engine Coolant Temperature (ECT) Sensor Signal

86-87

--

--

Not Used

88

BK/WH

251

Ground

89

BN

1667

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Heater Control

90-91

--

--

Not Used

92

PU/WH

1885

MIL Control

93

D-GN

335

Low Speed Cooling Fan Relay Control

94

WH/BK

1655

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 Heater Control

95-96

--

--

Not Used

97

BN/WH

1653

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Heater Control

98

--

--

Not Used

99

D-GN/WH

465

Fuel Pump Relay Control

100

--

--

Not Used

101

WH

121

Engine Speed Signal

102

D-BU

473

High Speed Cooling Fan Relay Control

103-104

--

--

Not Used

105

WH

1654

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 Heater Control

106

PU/WH

67

A/C Clutch Relay Control

107

YE

130

Fuel Level Sensor Signal

108

WH/BK

962

Intake Manifold Tuning Valve Solenoid Control

109

--

--

Not Used

110

OG/BK

1029

Main Relay Control

111-112

--

--

Not Used

113

PU

1986

EVAP Canister Vent Solenoid Control

114

BK

350

Ground

115

L-BU

1153

Ignition Coil 1 Control

116

D-BU

1154

Ignition Coil 2 Control

117

D-GN

1157

Ignition Coil 5 Control

118

GY

1158

Ignition Coil 6 Control

119

PK/BK

1846

Main Relay Voltage

120

RD

1156

Ignition Coil 4 Control

121

YE

1155

Ignition Coil 3 Control

Engine Control Module Connector End Views With Electronic Throttle Control

Table 1: Engine Control Module (ECM) Connector-A
Table 2: Engine Control Module (ECM) Connector-K

Engine Control Module (ECM) Connector-A


Object Number: 1725344  Size: CH

Connector Part Information

    • AMP 2-1355123-3
    • 60-Way F 60POS Receptacle Hsg Assembly (BK)

Pin

Wire Color

Circuit No.

Function

A1

GY

1158

Ignition Coil 6 Control

A2

D-BU

1154

Ignition Coil 2 Control

A3

RD

1156

Ignition Coil 4 Control

A4

--

--

Not Used

A5

BN

1667

HO2S1 Bank 2 Heater Control

A6

PU

1666

HO2S1 Bank 2 Signal

A7

D-BU/BK

650

Low Reference

A8

D-GN/WH

1664

HO2S2 Bank 2 Signal

A9

D-GN/WH

1456

EGR Position Sensor Signal

A10

--

--

Not Used

A11

BK

650

Low Reference

A12

BK

750

Low Reference

A13

BK

470

Low Reference

A14

L-GN

432

MAP Sensor Signal

A15

--

--

Not Used

A16

PU

1986

EVAP Canister Vent Solenoid Valve Control

A17

D-GN/WH

428

EVAP Canister Purge Solenoid Valve Control

A18

--

--

Not Used

A19

WH/BK

1655

HO2S Bank 2 Heater

A20-A25

--

--

Not Used

A26

D-GN

335

Cooling Fan Low Speed

A27

--

--

Not Used

A28

WH

121

Engine RPM Signal

A29-A30

--

--

Not Used

A31

L-BU

1153

Ignition Coil 1 Control

A32

D-GN

1157

Ignition Coil 5 Control

A33

YE

1155

Ignition Coil 3 Control

A34

BK/WH

1057

Sensor Ground

A35-A37

--

--

Not Used

A38

GY/BK

605

Low Reference

A39

D-BU/WH

1936

Fuel Level Sensor Signal

A40

BK

1550

Low Reference

A41-A45

--

--

Low Reference

A46

GY/BK

435

EGR Solenoid Control

A47

WH/BK

962

Intake Manifold Tuning (IMT) Valve Solenoid Control

A48-A50

--

--

Not Used

A51

D-BU

473

Cooling Fan Hi Speed

A52

--

--

Not Used

A53

D-BU/WH

85

Cruise ON Indicator

A54

L-GN/RD

791

APP Sensor 2 Signal

A55

BK

1450

Low Reference

A56

BN/BK

790

APP Sensor 1 Signal

A57

D-GN

534

TP Sensor 2 Signal

A58

BK

550

Low Reference

A59

D-BU/WH

417

TP Sensor 1 Signal

A60

--

--

Not Used

Engine Control Module (ECM) Connector-K


Object Number: 1725343  Size: CH

Connector Part Information

    • AMP 3-1355136-3
    • 94-Way F 94POS Receptacle Hsg Assembly (BK)

Pin

Wire Color

Circuit No.

Function

K1

BK

350

Ground

K2

PK/D-BU

539

Ignition 1

K3

BK

350

Ground

K4

PK/BK

1846

Ignition 1 Voltage

K5

BK

251

Ground

K6

OG

440

Battery Positive Voltage

K7-K8

--

--

Not Used

K9

BK

750

Low Reference

K10

D-GN

1663

HO2S2 Bank 1 Signal

K11

PU/WH

1665

HO2S1 Bank 1 Signal

K12

D-BU/BK

650

Low Reference

K13

WH

496

Knock Sensor 1 Signal

K14

YE/BK

452

Knock Sensor 1 Ground

K15

D-BU/BK

480

Rough Road Sensor Signal

K16

--

--

Not Used

K17

D-GN/WH

762

A/C Request Signal

K18

GY

416

5 Volt Reference 1

K19

BK

2250

Low Reference

K20

D-GN

990

Low Reference

K21

Dk-BU/WH

1876

Knock Sensor 2 Signal

K22

YE/BK

452

Knock Sensor 2 Ground

K23

GY

474

5 Volt Reference 3

K24

D-BU

488

5 Volt Reference 3

K25-K29

--

--

Not Used

K30

L-BU/BK

808

Low Reference

K31

YE

492

MAF Sensor Signal

K32

D-BU/BK

632

CMP Sensor Ground

K33

BN/WH

633

CMP Sensor Signal

K34

BK

750

Low Reference

K35

D-GN

890

FTP Sensor Signal

K36

YE

87

Cruise Resume Signal

K37

BK/BN

645

Low Reference

K38-K40

--

--

Not Used

K41

RD/BK

380

Refrigerant Pressure Signal

K42

BK/WH

470

Ground

K43-K46

--

--

Not Used

K47

GY/BK

469

5 Volt Reference

K48

GY/BK

469

5Volt Reference 1

K49

WH

543

5 Volt Reference 3

K50-K52

--

--

Not Used

K53

BN/WH

186

Stop Lamp Switch Signal

K54

--

--

Not Used

K55

D-BU/WH

1869

CKP Sensor Reference High

K56

YE/BK

1868

CKP Sensor Reference Low

K57

1704

1704

CKP Sensor Ground

K58

BN

472

Intake Air Temperature (IAT) Sensor Signal

K59

BK/WH

632

Low Reference

K60

WH

397

Cruise ON Signal

K61

D-BU

84

Cruise Control Set Signal

K62

YE

410

ECT Sensor Signal

K63

--

--

Not Used

K64

OG/BK

1029

Engine Main Relay Control

K65

--

--

Not Used

K66

D-BU/BK

844

Fuel Injector 4

K67

L-GN/BK

1745

Fuel Injector 2

K68

YE/BK

846

Fuel Injector 6

K69

--

--

Not Used

K70

D-GN/WH

465

Fuel Pump Relay Control

K71

D-BU

426

TAC Motor Control -- 1

K72

L-BU

425

TAC Motor Control -- 2

K73-K75

--

--

Not Used

K76

D-GN/BK

2905

Serial Data

K77

YE/BK

1921

CAN Serial Data High

K78

WH/BK

1922

CAN Serial Data Low

K79-K82

--

--

Not Used

K83

L-BU

20

Cruise Signal

K84-K85

--

--

Not Used

K86

D-GN

135

Engine Temperature Gage Output

K87

PU/WH

67

A/C Relay Control

K88

YE

130

Fuel Level Gage Output

K89

BK

1744

Fuel Injector 1

K90

D-BU/BK

845

Fuel Injector 5

K91

RD/BK

1746

Fuel Injector 3

K92

PU/WH

1885

MIL Control

K93

BN/WH

1653

HO2S1 Bank 1 Heater Control

K94

WH

1654

HO2S2 Bank 1 Heater Control