GM Service Manual Online
For 1990-2009 cars only

Engine Control Module Connector End View


Object Number: 60839  Size: CF

Connector Part Information

Engine Control Module Connector

Pin

Wire Color

Circuit No.

Function

1

BRN/WHT

--

HO2S Heater Control (Rear)

2

BRN/BLU

--

IAC Valve Control (Close)

3

BRN/YEL

--

Fuel Injector 1 Control

4

BRN/BLU

--

Fuel Injector 3 Control

5

BRN/BLK

--

Fuel Injector 5 Control

6

BLK

--

ECM Ground

7

BRN/GRN

--

Intake Resonance Switchover Solenoid Valve Control

8

BRN/BLU

--

Malfunction Indicator Lamp (MIL) Control

9- 11

--

--

Not Used

12

BLK/BLU

--

AC Load Signal

13-14

--

--

Not Used

15

BLK/WHT

--

AC Request Signal

16

BLU/RED

--

IAT Sensor Signal

17

BLU/GRN

--

MAF Sensor Signal

18

BRN/BLU

--

HO2S Signal B2S1

19

BRN/BLU

--

HO2S Signal B1S1

20

GRY/RED

--

CKP Sensor Ground

21

BRN/GRN

--

Transmission Torque Reduction Request Circuit

22-25

--

--

Not Used

26

RED/BRN

--

Battery Voltage

27

BRN/GRY

--

Engine Controls Power Relay Control

28

BLK

--

ECM Ground

29

BRN/RED

--

IAC Valve Control (Open)

30

BRN/WHT

--

HO2S Heater Control (Front)

31

BRN/GRN

--

Fuel Injector 2 Control

32

BRN/RED

--

Fuel Injector 4 Control

33

BRN/PPL

--

Fuel Injector 6 Control

34

BLK

--

ECM Ground

35

BRN/GRN

--

Intake Plenum Switchover Solenoid

36

BRN/PPL

--

AC Relay Control

37

WHT

--

AIR Pump Relay Control

38

GRY/RED/BLK

--

CMP Sensor Signal

39

RED/BLK

--

MIL Request

40

BRN/WHT

--

Knock Sensor (KS) B2

41-43

--

--

Not Used

44

BRN/BLU

--

Throttle Position (TP) Sensor Signal

45

BRN/LT GRN

--

Mass Air Flow (MAF) Sensor Signal Return

46

BRN/GRN

--

HO2S Ground

47

--

--

Not Used

48

GRY

--

Traction Control Torque Reduction Request

49

GRY/BLK

--

Ignition Control (IC) 1-4

50

BLK/YEL

--

Ignition Control (IC) 2-5

51

BLK/RED

--

Ignition Control (IC) 3-6

52

--

--

Not Used

53

BLU/BLK

--

5 Volt Reference

54

RED/BLU

--

Switched Battery Voltage

55

BLK

--

ECM Ground

56

BRN

--

ECM Ignition Feed

57-60

--

--

Not Used

61

BRN/RED

--

EVAP Canister Purge Valve Control

62

PPL

--

AIR Cut-Off Solenoid Valve Control

63

BRN

--

Fuel Pump Relay Control

64

--

--

Not Used

65

BRN/BLK

--

EVAP Canister Vent Valve Control

66-67

--

--

Not Used

68

--

--

Traction Control Input/PWM Interface

69

BLK/RED

--

P/N Signal

70

BRN/WHT

--

Knock Sensor (KS) B1

71

BLU/GRN

--

5 V Reference Ground

72

BRN/YEL

--

EVAP Fuel Tank Pressure Sensor Signal

73

BLU/BLK

--

EVAP Fuel Tank Level Sensor Signal

74

BRN/BLU

--

Engine Coolant Temperature (ECT) Sensor Signal

75

--

--

Not Used

76

BRN/BLU

--

HO2S Signal B2 S2

77

BRN/BLU

--

HO2S Signal B1 S2

78

GRN/WHT

--

CKP Sensor Signal

79

BLU/RED

--

Vehicle Speed/Theft Deterrent Signal

80

GRN

--

Engine Speed Output

81

--

--

Not Used

82

BRN/YEL

--

ECM Data Output

83

GRY

--

Engine Torque Output

84-87

--

--

Not Used

88

BRN/WHT

--

Serial Data

For more detailed information, refer to Engine Scan Tool Data List .