GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Control Module - X1(LY7)
Table 2: Engine Control Module - X2 (LY7)

Engine Control Module - X1(LY7)


Object Number: 1989334  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X1-1

L-GN

0.75

Cam Phaser Exhaust 1 Signal

X1-2

PU

0.75

Cam Phaser Intake 1 Signal

X1-3

--

--

Not Used

X1-4

YE/BK

0.75

Fuel Injector 6 Control

X1-5

D-GN/WH

0.75

EVAP Canister Purge Solenoid Control

X1-6

--

--

Not Used

X1-7

OG/BU

0.5

Intake 1 Cam Position Sensor Signal

X1-8

--

--

Not Used

X1-9

PU

0.5

Exhaust 2 Cam Position Sensor Signal

X1-10

OG/WH

0.5

Generator Turn On Signal

X1-11

BN

0.5

Oil Level Switch Signal

X1-12

L-BU/WH

0.75

VIM PWM Signal

X1-13

PK

0.5

Low Reference

X1-14

--

--

Not Used

X1-15

GY

0.75

5-Volt Reference

X1-16

--

--

Not Used

X1-17

--

--

Not Used

X1-18

--

--

Not Used

X1-19

--

--

Not Used

X1-20

--

--

Not Used

X1-21

--

--

Not Used

X1-22

--

--

Not Used

X1-23

--

--

Not Used

X1-24

YE

0.75

TAC Motor Control - 1

X1-25

WH/BK

0.75

Cam Phaser Exhaust 2 Signal

X1-26

PK/BK

0.75

Fuel Injector 3 Control

X1-27

--

--

Not Used

X1-28

BN/WH

0.75

Fuel Injector 5 Control

X1-29

--

--

Not Used

X1-30

PU/WH

0.5

Generator Field Duty Cycle Signal

X1-31

--

--

Not Used

X1-32

--

--

Not Used

X1-33

YE/RD

0.5

Intake 2 Cam Position Sensor Signal

X1-34

D-GN

0.5

Exhaust 1 Cam Position Sensor Signal

X1-35

YE/BU

0.5

CKP Sensor 1 Signal

X1-36

--

--

Not Used

X1-37

--

--

Not Used

X1-38

--

--

Not Used

X1-39

GY

0.5

5-Volt Reference

X1-40

GY

0.5

5-Volt Reference

X1-41

PK/BK

0.75

Low Reference

X1-42

--

--

Not Used

X1-43

BN/RD

0.5

Low Reference

X1-44

BK

0.5

Low Reference

X1-45

PU/WH

0.5

5-Volt Reference

X1-46

PU

0.5

Low Reference

X1-47

--

--

Not Used

X1-48

BN

0.75

TAC Motor Control - 2

X1-49

OG/BK

0.75

Cam Phaser Intake 2 Signal

X1-50

L-BU/BK

0.75

Fuel Injector 4 Control

X1-51

BN/BK

0.75

Fuel Injector 1 Control

X1-52

L-GN/BK

0.75

Fuel Injector 2 Control

X1-53

--

--

Not Used

X1-54

--

--

Not Used

X1-55

PU

0.5

IC 1 Control

X1-56

L-BU

0.5

IC 3 Control

X1-57

GN/RD

0.5

IC 5 Control

X1-58

--

--

Not Used

X1-59

D-BU

0.5

Knock Sensor 1 Signal

X1-60

BN

0.5

Low Reference

X1-61

BN/WH

0.5

Oil Pressure Sensor Signal

X1-62

--

--

Not Used

X1-63

--

--

Not Used

X1-64

--

--

Not Used

X1-65

--

--

Not Used

X1-66

--

--

Not Used

X1-67

BN/YE

0.5

HO2S Low Signal (Bank 1 Sensor 1)

X1-68

WH

0.5

HO2S Output Pump Current (Bank 1 Sensor 1)

X1-69

OG

0.5

HO2S Input Pump Current (Bank 2 Sensor 1)

X1-70

PU

0.5

HO2S High Signal (Bank 2 Sensor 1)

X1-71

--

--

Not Used

X1-72

L-GN

0.75

HO2S Low Signal (Bank 2 Sensor 1)

X1-72

--

--

Not Used

X1-73

--

--

Not Used

X1-74

--

--

Not Used

X1-75

--

--

Not Used

X1-76

--

--

Not Used

X1-77

--

--

Not Used

X1-78

PU

0.5

Low Reference

X1-79

OG/WH

0.5

IC 2 Control

X1-80

D-GN/WH

0.5

IC 4 Control

X1-81

L-BU/WH

0.5

IC 6 Control

X1-82

YE/GN

0.5

ECT Sensor Signal

X1-83

GY

0.5

Low Reference

X1-84

L-BU

0.5

Knock Sensor 2 Signal

X1-85

GN/YE

0.5

Oil Temperature Sensor Signal

X1-86

--

--

Not Used

X1-87

--

--

Not Used

X1-88

BN/BK

0.5

Low Reference

X1-89

PU

0.5

TP Sensor 2 Signal

X1-90

D-GN

0.5

TP Sensor 1 Signal

X1-91

L-GN

0.5

HO2S Input Pump Current (Bank 1 Sensor 1)

X1-92

PU/WH

0.5

HO2S High Signal (Bank 1 Sensor 1)

X1-93

BN/RD

0.5

HO2S Low Signal (Bank 2 Sensor 1)

X1-94

PU/WH

0.5

HO2S Output Pump Current (Bank 2 Sensor 1)

X1-95

--

--

Not Used

X1-96

GY/WH

0.75

HO2S Heater Low Control (Bank 1 Sensor 1)

Engine Control Module - X2 (LY7)


Object Number: 1989339  Size: CH

Connector Part Information

 

Pin

Wire Colour

Wire Size

Function

X2-1

BK

0.5

Ground

X2-2

BK

0.5

Ground

X2-3

PK/BU

0.75

Ignition 1 Voltage

X2-4

BK

0.5

Ground

X2-5

PK/BK

0.8

Ignition 1 Voltage

X2-6

PK/BU

0.75

Ignition 1 Voltage

X2-7

GY/WH

0.75

HO2S Heater Low Control (Bank 1 Sensor 2)

X2-8

--

--

Not Used

X2-9

BN/YE

0.5

Low Reference

X2-10

D-GN/WH

0.5

Fuel Pump Relay Control (Primary)

X2-11

BN/GN

0.5

Low Reference

X2-12

--

--

Not Used

X2-13

YE

0.5

MAF Sensor Signal

X2-14

--

--

Not Used

X2-15

BU/WH

0.5

APP Sensor 1 Signal

X2-16

BN/WH

0.5

CPP Switch Signal

X2-17

D-GN

0.5

Park/Neutral/Clutch Safety Switch Signal

X2-18

L-GN

0.5

Backup Lamp Switch Signal

X2-19

--

--

Not Used

X2-20

OG/WH

0.75

HO2S Heater Low Control (Bank 2 Sensor 2)

X2-21

BN/WH

0.5

MIL Control

X2-22

BN/WH

0.5

Low Reference

X2-23

BN/GN

0.5

HO2S Low Signal (Bank 1 Sensor 2)

X2-24

BN/RD

0.5

HO2S Low Signal (Bank 2 Sensor 2)

X2-25

L-BU

0.5

APP Sensor 2 Signal

X2-26

L-BU

0.5

Fuel Level Sensor Signal (1)

X2-27

--

--

Not Used

X2-28

--

--

Not Used

X2-29

--

--

Not Used

X2-30

--

--

Not Used

X2-31

--

--

Not Used

X2-32

--

--

Not Used

X2-33

--

--

Not Used

X2-34

BN

0.5

Low Reference

X2-35

GY

0.5

5-Volt Reference

X2-36

PU

0.5

Fuel Level Sensor Signal (2)

X2-37

--

--

Not Used

X2-38

PU

0.5

HO2S High Signal (Bank 1 Sensor 2)

X2-39

OG/BK

0.5

A/C Refrigerant Pressure Sensor Signal

X2-40

--

--

Not Used

X2-41

D-BU

0.5

Ignition Switch Wake Up Signal

X2-42

BN/BK

0.5

High Speed GMLAN Serial Data Bus+

X2-43

--

--

Not Used

X2-44

--

--

Not Used

X2-45

BU/BK

0.5

High Speed Cooling Fan Relay Control

X2-46

D-GN

0.5

Low Speed Cooling Fan Relay Control

X2-47

PU

0.5

Low Reference

X2-48

BN/YE

0.5

5-Volt Reference

X2-49

WH/BK

0.5

5-Volt Reference

X2-50

BN/RD

0.5

IAT Sensor Signal

X2-51

PU

0.5

HO2S High Signal (Bank 2 Sensor 2)

X2-52

WH/BU

0.5

Stop Lamp Switch Signal

X2-53

--

--

Not Used

X2-54

PK

0.5

Ignition 1 Voltage

X2-55

BN

0.5

High Speed GMLAN Serial Data Bus-

X2-56

OG/BK

0.75

Battery Positive Voltage

X2-57

YE

0.5

Starter Relay Coil Control

X2-58

BN

0.5

Main Relay Control