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

Engine Control Module (ECM) C1


Object Number: 1339820  Size: CF

Connector Part Information

  • OEM: 1 928 404 781
  • Description: 96-Way F Bosch (BK)

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

BK

CU15

Ground

2

BK

CU09

Ground

3

BK

CU10

Ground

4

BK

CU13

Ground

5

BK

CU14

Ground

6

--

--

Not Used

7

TN

CF13

Low Reference

8

VT

CF16

Low Reference

9

RD

CF19

Low Reference

10

L-BU/YE

DF24

Low Reference

11

--

--

Not Used

12

BK/YE

CF96

Low Reference

13

--

--

Not Used

14

GY

OA19

Ground (Allison® LCT)

BK/YE

DF41

Drain Wire (M/T)

15

--

--

Not Used

16

TN

CF10

Shield

17

WH/RD

CF36

SAE J1939 Serial Data Bus+

18

L-GN/RD

CF37

SAE J1939 Serial Data Bus-

19

--

--

Not Used

20

D-GN

CF34

ECM Class 2 Serial Data A

21

--

--

Not Used

22

PK

DF55

Ignition 0 Voltage

23

PK

CF10

Ignition 1 Voltage

24-25

--

--

Not Used

26

BK

CU11

Ground

27

BK

CU12

Ground

28

WH

CF22

Engine Speed Signal

29-30

--

--

Not Used

31

L-BU

CF12

APP Sensor 1 Signal

32

L-GN

CF15

APP Sensor 2 Signal

33

D-GN

CF18

APP Sensor 3 Signal

34

L-BU/RD

DF23

PTO Accel Switch Signal

35-36

--

--

Not Used

37

VT

CF97

Fuel Level Signal - Primary

38

L-BU

CF99

Fuel Level Signal - Secondary

39

WH

OA16

VSS High Signal (Allison® LCT)

WH

DF38

Signal High - Rear (Manual Transmission)

--

--

Not Used (Allison® MD)

40

BK

DF39

Signal Low - Rear (Manual Transmission)

--

--

Not Used (Automatic Transmission)

41

RD/BK

DF59

Generator Field Duty Cycle Signal

42

--

--

Not Used

43

RD/D-BU

DF56

Shift Motor Relay - Control (HPZ)

--

--

Not Used (w/o HPZ)

44-45

--

--

Not Used

46

RD/BK

DF50

Cruise Control On Switch Signal

47

RD

DF48

Cruise Control Resume/Accel Switch Signal

48

L-BU

DF47

Cruise Control Set/Coast Switch Signal

49

BK

CF04

Ignition 1 Voltage

50

BK/RD

CF05

Ignition 1 Voltage

51

L-BU/OG

CF08

Battery Positive Voltage

52

WH

CF06

ECM Power Enable Signal

53

WH

CF07

ECM Power Enable Signal

54

WH/BK

CF11

5-Volt Reference

55

BK/WH

CF14

5-Volt Reference

56

YE/BK

CF17

5-Volt Reference

57

--

--

Not Used

58

L-BU/WH

DF22

5-Volt Reference

59-60

--

--

Not Used

61

RD

DF60

Charge Indicator Control

62

WH

DF43

Stop Lamp Switch Signal (JE3)

WH

DF46

Stop Lamp Switch Signal (JE4)

63

RD/D-BU

DF45

TCC Brake Switch/Cruise Control Release Signal

64

BK/OG

CF29

CPP Switch Signal (Manual Transmission)

--

--

Not Used (Automatic Transmission)

65-66

--

--

Not Used

67

WH

CF32

Exhaust Brake Request Signal

68

D-GN

CF24

High Idle Switch Signal

69

--

--

Not Used

70

L-GN

DF61

Coolant Level Switch Signal

71

L-GN

BA03

Backup Lamp Supply Voltage

72-73

--

--

Not Used

74

YE

HB04

Glow Plug Relay Control

75

VT

WB05

PTO Control

76

YE

DF58

Starter Relay Coil Control

77

VT

DF44

Exhaust Brake Relay Control

78

RD

CF26

High Idle Indicator Control

79

L-BU

CF21

Wait to Start Indicator Control

80

BK/WH

CF20

MIL Control

81

D-GN/WH

CF23

Vehicle Speed Signal

82

WH/BK

DF57

Vehicle Speed Signal

83-85

--

--

Not Used

86

WH/BK

DF01

Brake/Clutch Switch Override Signal

87

--

--

Not Used

88

RD/BK

DF02

PTO Disable Switch - Signal - Cab

89

BK/WH

DF04

PTO Set Switch Signal A

90

D-GN/WH

DF03

PTO Set Switch Signal B

91

BK/YE

DF05

PTO Set Switch Signal - Remote

92

WH/RD

DF06

PTO Resume Switch Signal - Remote

93

L-GN

WB09

PTO On Switch-Signal

94

L-GN

WB12

PTO Engine Kill Signal

95

L-BU/RD

WB11

PTO Engage Signal

96

YE

CF35

PNP/Clutch Start Switch Signal

Engine Control Module (ECM) C2


Object Number: 1360604  Size: CH

Connector Part Information

  • OEM: 1 928 404 752
  • Description: 58-Way F Bosch (BK)

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

BK

B1

Turbocharger Vane Position Control Solenoid Valve High Control

2

--

--

Not Used

3

WH

B3

Injector Positive Voltage Control 1

4

RD

B4

Injector Positive Voltage Control 2

5

WH

B5

Injector Positive Voltage Control 1

6

RD

B6

Injector Positive Voltage Control 2

7

BK/WH

B7

EGR Motor U Supply Voltage

8

L-GN

B8

EGR Motor V Supply Voltage

9

RD/YE

B9

EGR Motor W Supply Voltage

10

--

--

Not Used

11

BK

B11

Not Used

12

BK

B12A

Low Reference

13

BK

B13A

Low Reference

14

BK/YE

B14

Low Reference

15

GY

B15A

Low Reference

16

BK

B16A

Low Reference

17

WH/BK

B17

Ground

18

BK

B18A

Drain Wire

19

GY

B19

Drain Wire

20

RD

B20

SCV Low Signal

21

RD

B21

SCV Low Signal

22

--

--

Not Used

23

RD

B23

Not Used

24

WH

B24

MAP Sensor Signal

25

WH

B25A

Fuel Pressure Sensor Signal

26

WH

B26

Fuel Pressure Sensor Signal

27

GY

B27

Oil Pressure Sensor Signal

28

WH

B28

MAF Sensor Signal

29

WH

B29

Turbocharger Vane Position Signal

30

WH

B30

CMP Sensor Low

31

WH

B31

CKP Sensor High

32

BK

B32

CKP Sensor Low

33

WH

B33

SCV High Signal

34

WH

B34

SCV High Signal

35

D-BU/WH

B35

ECT Sensor Signal

36

--

--

Not Used

37

L-GN/WH

B37

IAT Sensor Signal

38

D-BU/RD

B38

EGR Motor Position U Signal

39

WH/RD

B39

EGR Motor Position V Signal

40

YE/RD

B40

EGR Motor Position W Signal

41

YE

B41

Fuel Temperature Sensor Signal

42

RD

B42

Low Reference

43

RD

B43

Fuel Injector 6 Control

44

BK

B44

Fuel Injector 4 Control

45

BK/RD

B45

Fuel Injector 5 Control

46

RD

B46

5-Volt Reference

47

RD

B47

5-Volt Reference

48

WH

B48

5-Volt Reference

49

WH

B49

5-Volt Reference

50

RD

B50

5-Volt Reference

51

RD

B51

5-Volt Reference

52

L-GN

B52

Oil Level Switch Signal

53-55

--

--

Not Used

56

WH

B56

Fuel Injector 3 Control

57

L-BU

B57

Fuel Injector 2 Control

58

YE

B58

Fuel Injector 1 Control