Hummer H1 (2006+). Manual - part 161

OBD-488

On-Board Diagnostics

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72 WAY ECM J2 (BLACK) LOCATION: DRIVERSIDE UNDER ECM

PIN

CKT

COLOR

DESCRIPTION

1

2

507

OR/BK

Fuel rail pressure signal

3

4

5

232

BR

CAN shield

6

7

784

DB

T-case range switch input to the ECM (-)

8

107

BK

EGR stepper motor

9

10

11

12

13

14

624

GY

Coolant temperature sensor

15

16

17

18

19

718

DB

APP sensor 1 signal

20

21

661

GN

Transmission control module MIL request

22

23

615

LG

MAP sensor signal

C76 Female

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 On-Board Diagnostics  OBD-489

5745804

24

724

DG

APP sensor 3 signal

25

619

TN/WH

Oil pressure sensor signal

26

27

324

YL

Fuel temperature sensor signal

28

257

LG

Crank shaft sensor signal

29

251

BK

MAF sensor ground

30

616

OR/BK

MAP

31

368

WH

VNT valve position

32

33

108

OR/BK

EGR valve high control

34

244

BK

Ground

35

109

LG/BK

EGR valve low control

36

244

BK

Ground

37

38

39

618

BK

Engine oil pressure

40

719

BR

APP 1

41

42

509

YL

Fuel pressure regulator sensor signal

43

44

369

BR

VNT position sensor

45

46

613

GY/BK

Baro sensor signal

47

48

49

362

DB

Turbocharger vane position control solenoid valve high

50

363

WH

Turbocharger vane position control solenoid valve low

51

52

632

PK/BK

Injector 3 request

53

110

OR/BK

EGR valve, high control

54

722

PP

APP 2

55

111

LG/BK

EGR valve, low control

56

725

GY

APP 3

57

58

250

BK

Intake air temperature sensor

59

60

520

WH

Brake lamp switch

61

809

TN

TCC brake switch/cruise control release signal

62

63

660

LB

57x signal to the FICM

64

PIN

CKT

COLOR

DESCRIPTION

OBD-490

On-Board Diagnostics

_____________________________________________

56 WAY ECM (GRAY) LOCATION: DRIVERSIDE UNDER ECM

65

631

LG/BK

Fuel injector 2 request

66

636

RD/BK

Injector 7 request

67

623

YL

Engine coolant temperature signal

68

637

DB/BK

Fuel injector 8 request

69

633

LB/BK

Injector 4 request

70

634

BK/WH

Injector 5 request

71

635

YL/BK

Fuel injector 6 request

72

630

BK

Fuel injector 1 request 

73

1057

BK

Ground

PIN

CKT

COLOR

DESCRIPTION

1

2

3

4

5

6

7

8

243

PK

+12v Ignition input

9

10

514

PK

Ignition 1 Voltage 

11

12

497

YL

Vehicle speed sensor high

13

14

514

PK

Ignition 1 Voltage

15

PIN

CKT

COLOR

DESCRIPTION

C77 Female

_____________________________________________

 On-Board Diagnostics  OBD-491

5745804

16

17

18

331

WH

Crank request

19

152

DB

Cruise control SET/COAST switch signal

20

439

YL

A\C request

21

22

153

LG

Cruise RESUME\ACCELERATE

23

498

DG

Vehicle speed sensor low 

24

653

YL

Intake air temperature signal

25

26

27

28

714

DB

Check throttle lamp activation

29

30

151

GY

Cruise control “ON” switch signal

31

330

PP

PRNDL switch

32

33

34

35

332

BK

Starter relay

36

37

644

YL

Tach signal

38

39

40

658

BR

Malfunction indicator lamp

41

410

LG

A\C clutch relay

42

43

258

YL/BK

Crank sensor

44

244

BK

Ground

45

140

OR

Transmission reverse switch

46

47

48

252

BR

Fuel temperature sensor

49

50

51

253

BR/WH

Cam sensor signal

52

266

DB/WH

Crank sensor signal

53

54

55

56

PIN

CKT

COLOR

DESCRIPTION