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

Engine Control Module (ECM) Connector C1


Object Number: 651541  Size: CH

Connector Part Information

    • ZFW 64-3
    • 64-Way F (BLK)

Pin

Wire Color

Circuit No.

Function

1

BLK/WHT

FM20

Throttle Valve Motor (-)

2

BLK/WHT

XM950

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

3

BRN/BLU

XP35

Fuel Injector 3 Driver

4

BRN/GRN

XU35

Intake Plenum Switch-Over Valve Control

5

BRN/RED

XA61

EVAP Purge Solenoid Valve Control

6

BRN/GRN

XU410

Knock Sensor Bank 2 Low

7

BRN/GRN

XU960

HO2S Bank 2 Sensor 2 Ground

8-9

--

--

Not Used

10

GRY/BLK

RF78

CKP Signal High Input

11

BRN/RED

XA43

Heated Oxygen Sensor (HO2S ) Bank 1 Sensor 1 Input Pumping Current

12

BRN/WHT

XM309

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Ground

13

--

--

Not Used

14

GRY/BLK

RF50

Ignition Control Cyl 5

15

BLK/YEL

FB60

Ignition Control Cyl 3

16

BLK/RED

FA70

Ignition Control Cyl 1

17

BRN/YEL

XB20

Throttle Valve Motor (+)

18

BRN/GRY

XR61

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

19

BRN/YEL

XB17

Fuel Injector 1 Driver

20

BRN/BLK

XF15

Fuel Injector 5 Driver

21

--

--

Not Used

22

BRN/WHT

XM70

Knock Sensor Bank 1 Signal

23

BRN/BLU

XP961

Heated Oxygen Sensor (HO2S ) Bank 1 Sensor 2 Signal

24

WHT

M24

TP Sensor 1 Signal

25

BRN/BLU

XP74

ECT Sensor Signal

26

BRN/GRN

XU5

Sensor Ground (MAF/IAT, ECT, TP,CMP)

27

--

--

Not Used

28

BRN/BLU

XP19

Heated Oxygen Sensor ((HO2S) Bank 1 Sensor 1 Signal

29

BRN/GRN

XU464

Heated Oxygen Sensor (HO2S ) Bank 2 Sensor 1 Pump Current Output

30

GRY/BLK

RF51

Ignition Control Cyl 6

31

BLK/YEL

FB61

Ignition Control Cyl 4

32

BLK/RED

FA71

Ignition Control Cyl 2

33

BLK/WHT

FM30

Throttle Valve Motor (-)

34

BRN/WHT

XM951

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

35

BRN/GRN

XU16

Fuel Injector 2 Driver

36

BRN/PPL

XY33

Fuel Injector 6 Driver

37

--

--

Not Used

38

BRN/WHT

XM40

Knock Sensor Bank 2 Signal

39

BRN/BLU

XP960

Heated Oxygen Sensor (HO2S ) Bank 2 Sensor 2 Signal

40

BRN/BLU

XP53

TP Sensor 2 Signal

41

--

--

Not Used

42

WHT

M381

CMP Sensor Signal

43

BRN/GRN

XU462

Heated OPxygen Sensor (HO2S ) Bank 1 Sensor 1 Pump Current Output

44

BRN/BLU

XP18

Heated Oxygen Sensor (HO2S ) Bank 2 Sensor 1 Signal

45-48

--

--

Not Used

49

BRN/YEL

XB40

Throttle Valve Motor (+)

50

BRN/GRY

XR11

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

51

BLU/BLK

PF107

MAF 5 Volt Reference

52

BRN/RED

XA34

Fuel Injector 4 Driver

53

BRN/GRN

XU7

Intake Resonance Switchover Valve Control

54

BRN/GRN

XU420

Knock Sensor Bank 1 Low

55

BRN/GRN

XU950

Heated Oxygen Sensor (HO2S ) Bank 1 Sensor 2 Ground

56

GRY/RED

RA40

MAF Signal

57

BRN/BLK

XF30

IAT Sensor Signal

58

BLU/BLK

PF102

TP Sensor 5 Volts Reference

59

GRY/RED

RA20

CKP Reference Low

60

BRN/WHT

XM30

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Ground

61

BRN/RED

XA610

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Input Pump Current Input

62

BLK

f28

Knock Sensor 1, Knock Sensor 2, and CKP Sensor Shielded Ground

63--64

--

--

Not Used

Engine Control Module (ECM) Connector C2


Object Number: 371569  Size: CH

Connector Part Information

    • ZFW 64-2
    • 64-Way F (BLK)

Pin

Wire Color

Circuit No.

Function

1

BRN/WHT

XM801

Cruise Indicator

2-5

--

--

Not Used

6

BLK/BLU

FP120

A/C ON/OFF Signal

7

BLK/RED

FA7

5 Volts Reference

8

BRN/BLK

XF8

APP  1 Signal

9

--

--

Not Used

10

BLK/BRN

FX500

Cruise ON/OFF Signal

11

--

--

Not Used

12

BRN/GRY

XR12

EBCM CAN Interface Low

13

BRN/PPL

XY360

A/C Relay Control

14

--

--

Not Used

15

RED

A150

Battery Voltage

16

RED/BLU

AP16

Switched B+

17

--

--

Not Used

18

BRN/BLK

XF18

EVAP Vent Solenoid Control

19-21

--

--

Not Used

22

BLU/BLK

PF10

Fuel Level Input

23

--

--

Not Used

24

BRN/GRN

XR24

APP 1 Reference Ground

25

BRN/GRN

XU25

Fuel Tank Pressure Sensor Ground

26

BLK/BRN

FX888

Cruise Release Signal

27

BLK/YEL

FB500

Stop Lamp Signal

28

--

--

Not Used

29

BRN/PPL

XY29

EBCM CAN Interface High

30

BRN/BLU

XP30

Fuel Pump Relay Control

31

BRN/GRY

XR31

Engine Controls Power Relay Control

32

RED/BLU

AP32

Switched B+

33

GRY

R233

Filler Cap Lamp

34

BRN/YEL

XB34

Secondary Air Pump Solenoid Control

35

GRN

U744

RPM Signal Output

36

--

--

Not Used

37

BRN/YEL

XB900

Fuel Tank Pressure Sensor Signal

38-39

--

--

Not Used

40

BRN/RED

XA40

APP 2 Signal

41

--

--

Not Used

42

BLK/RED

FA300

Cruise Resume/Decel Signal

43

BLK/YEL

FB300

Cruise Set/Accel Signal

44

BLU/RED

PA14

VSS/Theft Deterrent Signal

45

BRN/PPL

XY888

TCM CAN Interface High

46

BRN/BLU

XP22

MIL Control

47

BRN

X47

Ignition Switch

48

RED/BLU

AP48

Switched B+

49-52

--

--

Not Used

53

BRN/WHT

XM100

Serial Data/kw 2000/DLC

54-55

--

--

Not Used

56

BLK/GRY

FR56

APP 1 5 Volt Reference

57

--

--

Not Used

58

BLK/WHT

FM98

A/C Request

59-60

--

--

Not Used

61

BRN/GRY

XR888

TCM CAN Interface Low

62

BRN/GRY

XR620

Secondary Air Pump Relay Control

63

BLU/BLK

PF900

5 Volt Reference

64

--

--

Not Used