GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module X1
Connector 2: Engine Control Module X2

Engine Control Module X1


Object Number: 1590596  Size: CH

Connector Part Information

  • OEM: 15499466
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 2.8 Sealed (BK)

Terminal Part Information

  • Pins: 1, 12-13, 16, 23-24, 29-34, 36, 50-51, 56-57, 59, 63, 68, 70-71
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 2-3, 9-11, 18-20, 27-28, 37, 38, 41, 47, 49, 52, 61, 64-65, 69, 71-72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)

Engine Control Module X1

Pin

Wire Color

Circuit No.

Function

1

0.35 OG/BK

1786

Park/Neutral Signal

2

0.5 GY/BK

1694

4WD Low Signal (NQG/NP2)

3

0.5 TN/WH

1695

Axle Switch Signal (NQG/NP2)

4-8

--

--

Not Used

9

0.5 L-BU/WH

6311

Brake Switch Signal

10

0.5 PU/WH

1668

HO2S High Signal - Bank 1 Sensor 2

11

0.5 TN/WH

1669

HO2S Low Signal - Bank 1 Sensor 2

12

0.35 OG/BK

380

A/C Refrigerant Pressure Sensor Signal (CJ2/C67)

13

0.35 TN

5514

Low Reference (CJ2/C67)

14-15

--

--

Not Used

16

0.35 PU

1589

Fuel Level Sensor Signal - Primary

17

0.35 D-BU/WH

473

High Speed Cooling Fan Relay Control (-LY6)

18

0.5 D-BU

5985

Accessory Wakeup Serial Data

19

0.5 PK

439

Ignition 1 Voltage

20

0.5 RD/WH

440

Battery Positive Voltage

21-22

--

--

Not Used

23

0.35 PU

1272

Low Reference

24

0.35 D-GN

890

Fuel Tank Pressure Sensor Signal

25-26

--

--

Not Used

27

0.5 TN/BK

2501

High Speed GMLAN Serial Data Bus-

28

0.5 TN/BK

2500

High Speed GMLAN Serial Data Bus+

29

0.35 D-BU

1161

APP Sensor 1 Signal

30

0.35 BN

1271

Low Reference

31

0.35 TN/BK

6049

Low Reference

32

0.35 L-BU

1162

APP Sensor 2 Signal

33

0.35 GY

2709

5-Volt Reference 1

34

0.35 GY/WH

2700

5-Volt Reference (CJ2/C67)

35

--

--

Not Used

36

0.35 TN

1274

5-Volt Reference 1

37

0.5 TN/BK

472

IAT Sensor Signal

38

0.5 TN

2760

Low Reference

39-40

--

--

Not Used

41

0.5 YE

492

MAF Sensor Signal

42-46

--

--

Not Used

47

0.5 PK/BK

1339

Ignition 1 Voltage

48

--

--

Not Used

49

0.5 TN

1671

HO2S Low Signal - Bank 2 Sensor 2

50

0.35 D-GN/WH

465

Fuel Pump Relay Control - Primary (LGM/LY6/LC9)

Fuel System Control Module Signal (-LGM/LY6/LC9)

51

0.35 TN

1465

Fuel Pump Relay Control - Secondary (LY6)

52

0.5 YE/BK

625

Starter Enable Relay Control

53-55

--

--

Not Used

56

0.35 WH/BK

1164

5-Volt Reference 2

57

0.35 YE/BK

1827

Vehicle Speed Signal

58

0.35 D-GN

335

Low Speed Cooling Fan Relay Control (-LY6)

59

0.35 YE

5991

Powertrain Relay Coil Control

60

--

--

Not Used

61

0.5 WH

1310

EVAP Canister Vent Solenoid Control

62

--

--

Not Used

63

0.35 D-GN/WH

459

A/C Compressor Clutch Relay Control (CJ2/C67)

64

0.5 OG/WH

3223

HO2S Heater Low Control (Bank 2 Sensor 2)

65

0.5 GY/WH

3122

HO2S Heater Low Control - Bank 2 Sensor 1

66-67

--

--

Not Used

68

0.35 BN/WH

419

MIL Control

69

0.5 PU

1670

HO2S High Signal - Bank 2 Sensor 2

70

0.35 L-BU

1937

Secondary Fuel Level Sensor Signal (LY6)

71

0.5 PU/WH

821

VSS High Signal (20/30 Series +NQF/+NQG/+NP2)

0.35 OG/BK

6399

Replicated TOS Signal (10 Series/20/30 Series -NQF/-NQG/-NP2)

72

0.5 L-GN/BK

822

VSS Low Signal (20/30 Series +NQF/+NQG/+NP2)

73

3.0 BK/WH

451

Ground

Engine Control Module X2


Object Number: 1830236  Size: CH

Connector Part Information

  • OEM: 13511426
  • Service: 19115670
  • Description: 80-Way F Receptacle 0.64 2.8 Sealed (GY)

Terminal Part Information

  • Pins: 2-3, 16, 34, 35, 41, 43, 44, 50, 52-53, 58, 63-66, 68-69
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 5-6, 8, 12-13, 17-22, 32-33, 37-40, 56-57, 59-61, 70-79
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 26-27, 29-30
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module X2

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

0.35 PU/WH

6270

5-Volt Reference 2

3

0.35 GY

2701

5-Volt Reference 2

4

--

--

Not Used

5

0.5 BN

582

TAC Motor Control - 2

6

0.5 YE

581

TAC Motor Control - 1

7

--

--

Not Used

8

0.5 D-GN/WH

428

EVAP Canister Purge Solenoid Control

9

0.5 GY

5493

Cylinder 6 Shutoff Solenoid Control 3 (-4.8L)

10

0.5 D-BU

5491

Cylinder Shutoff Solenoid Control (1) (-4.8L)

11

0.5 OG

5494

Cylinder 4 Shutoff Solenoid Control 2 (-4.8L)

12

0.5 GY/WH

3113

HO2S Heater Low Control - Bank 1 Sensor 1

13

0.5 L-GN

3212

HO2S Heater Low Control - Bank 2 Sensor 1

14

0.5 L-GN/BK

5492

Cylinder 7 Shutoff Solenoid Control 4 (-4.8L)

15

--

--

Not Used

16

0.35 PU

5284

Camshaft Actuator Solenoid Control (6.0L/6.2L)

17

0.5 D-BU/WH

878

Fuel Injector 8 Control

18

0.5 TN/WH

845

Fuel Injector 5 Control

19

0.5 YE/BK

846

Fuel Injector 6 Control

20

0.5 TN

1744

Fuel Injector 1 Control

21

0.5 YE

410

ECT Sensor Signal

22

0.5 TN

2761

Low Reference

23-25

--

--

Not Used

26

0.8 D-BU

496

KS 1 Signal

27

0.8 GY

1716

KS 1 Signal

28

--

--

Not Used

29

0.8 L-BU

1876

KS 2 Signal

30

0.8 GY

2303

KS 2 Signal

31

--

--

Not Used

32

0.5 GY

23

Generator Field Duty Cycle Signal

33

0.5 BN

1174

Oil Level Switch Signal

34

0.35 BK

2755

Low Reference

35

0.35 TN

2752

Low Reference

36

--

--

Not Used

37

0.5 L-GN/BK

1745

Fuel Injector 2 Control

38

0.5 PK/BK

1746

Fuel Injector 3 Control

39

0.5 L-BU/BK

844

Fuel Injector 4 Control

40

0.5 OG/BK

877

Fuel Injector 7 Control

41

0.35 GY

2705

5-Volt Reference 1

42

--

--

Not Used

43

0.35 GY

2704

5-Volt Reference 1

44

0.35 D-BU

6259

5-Volt Reference 1

45-49

--

--

Not Used

50

0.35 TN/WH

331

Oil Pressure Sensor Signal

51

--

--

Not Used

52

0.35 TN

2199

Low Reference (6.0L/6.2L)

53

0.35 OG/BK

469

Low Reference

54-55

--

--

Not Used

56

0.5 TN

1664

HO2S Low Signal - Bank 1 Sensor 1

57

0.5 PU/WH

1665

HO2S High Signal - Bank 1 Sensor 1

58

0.35 L-GN

432

MAP Sensor Signal

59

0.5 PU

1666

HO2S High Signal - Bank 2 Sensor 1

60

0.5 TN

1667

H02S Low Signal - Bank 2 Sesnor 1

61

0.5 BN

25

Charge Indicator Signal

62

--

--

Not Used

63

0.35 PU

486

TP Sensor 2 Signal

64

0.35 D-BU/WH

6265

CMP Sensor Signal

65

0.35 D-GN

485

TP Sensor 1 Signal

66

0.35 BN

6266

Low Reference

67

--

--

Not Used

68

0.35 WH/BK

6271

CKP Sensor Signal

69

0.35 GY/BK

6272

Low Reference

70

0.5 PU

2121

IC 1 Control

71

0.5 PU/WH

2128

IC 8 Control

72

0.5 OG

2127

IC 7 Control

73

0.5 OG/WH

2122

IC 2 Control

74

0.5 L-BU/WH

2126

IC 6 Control

75

0.5 D-GN

2125

IC 5 Control

76

0.5 D-GN/WH

2124

IC 4 Control

77

0.5 L-BU

2123

IC 3 Control

78

0.5 BN

2129

Low Reference

79

0.5 BN/WH

2130

Low Reference

80

--

--

Not Used