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

Engine Control Module (ECM) K


Object Number: 1466972  Size: CF

Connector Part Information

    • AMP 0-368434-1
    • 64-Way F ECU 64P Conn Assembly (32-bit-B) (BN)

Pin

Wire Color

Circuit No.

Function

1

OG

440

Battery Positive Voltage

2-4

--

--

Not Used

5

GY

892

Ground (w/Octane Switch)

6

D-GN

817

Vehicle Speed Signal (Manual Transmission)

7

GN

834

Rough Road Signal

8-11

--

--

Not Used

12

GY

473

High Speed Cooling Fan Relay Control

13

YE

492

Low Reference

14

PU

1807

CAN Serial Data High

15

YE

710

CAN Serial Data Low

16

BN

50

Heated Oxygen Sensor (HO2S) 1 Heater Control

17

OG

440

Battery Positive Voltage

18

PK

1739

Ignition 1 Voltage

19-20

--

--

Not Used

21

D-GN

602

Rough Road Sensor Signal (w/o ABS)

22

L-BU

203

A/C Refrigerant Pressure (ACP) Sensor Signal

23

--

--

Not Used

24

WH

135

Engine Coolant Temperature (ECT) Sensor Gage Signal

25

GY

121

Engine Speed Signal

26-27

--

--

Not Used

28

GY

355

Low Speed Cooling Fan Relay Control

29

D-GN

67

A/C Clutch Relay Control

30

WH

30

Fuel Level Sensor Signal

31

--

--

Not Used

32

BK/WH

2051

Serial Data

33

--

--

Not Used

34

L-BU

1937

Low Reference

35

D-GN/WH

762

A/C Request Signal

36

L-GN/OG

413

Heated Oxygen Sensor (HO2S) 2 Signal

L-GN

37-47

--

--

Not Used

48

YE

1578

Evaporative Emissions (EVAP) Canister Vent Solenoid Control

49

--

--

Not Used

50

WH/PK

1031

5-Volt Reference

51

GY

1936

Fuel Level Sensor Signal

52

L-BU

1030

Fuel Tank Pressure Sensor Signal

53

GN/BK

1670

Low Reference

54

YE/D-BU

497

Fuel Pump Relay Control

55-63

--

--

Not Used

64

BN

419

Malfunction Indicator Lamp (MIL) Control

Engine Control Module (ECM) M


Object Number: 1501851  Size: CF

Connector Part Information

    • AMP 1-368434-1
    • 64-Way F ECU 64P Conn Assembly (32-bit-B) (BK)

Pin

Wire Color

Circuit No.

Function

1

D-GN/WH

423

Ignition Coil (IC) Timing Control 1 and 4

2

BN

1671

Heated Oxygen Sensor (HO2S) 2 Heater Control

3

BN

1733

Fuel Pump Supply Voltage

4

WH

452

Evaporative Emissions (EVAP) Canister Purge Solenoid Control

5

YE/BK

1868

Low Reference

6

WH

425

Throttle Position (TP) Sensor Signal

7

L-BU

468

Intake Air Temperature (IAT) Sensor Signal

8

L-BU

432

Manifold Absolute Pressure (MAP) Sensor Signal

9

D-GN

435

Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal

10

--

--

Not Used

11

YE

1744

Fuel Injector 4 Control

12

WH

428

Heated Oxygen Sensor (HO2S) 1 Low Reference

13

L-GN

534

Idle Air Control (IAC) A High Control

14

D-GN

415

Idle Air Control (IAC) B Low Control

15

WH/D-BU

533

Idle Air Control (IAC) A Low Control

WH

16

L-BU

469

5-Volt Reference

17

--

--

Not Used

18

YE/BK

496

Knock Sensor Signal

19

D-BU

436

Exhaust Gas Recirculation (EGR) Solenoid Valve Control

20

--

--

Not Used

21

D-BU/WH

1869

Crankshaft Position (CKP) Sensor Signal

22

L-GN

1746

Fuel Injector 2 Control

23

--

--

Not Used

24

BN/WH

1745

Fuel Injector 3 Control

25

BN/BK

1747

Fuel Injector 1 Control

BN

26

L-BU/BK

1748

Camshaft Position (CMP) Sensor Signal

L-BU

27

--

--

Not Used

28

L-GN

410

Engine Coolant Temperature (ECT) Sensor Signal

29

D-BU/BK

429

Heated Oxygen Sensor (HO2S) 1 Signal

D-BU

30

L-GN

417

Idle Air Control (IAC) Coil B High Control

31

--

--

Not Used

32

PU

427

5-Volt Reference

33

OG

423

Ignition Coil (IC) Timing Control (1 and 4)

34

--

--

Not Used

35

L-BU

406

Ignition Coil (IC) Timing Control (2 and 3)

36

--

--

Not Used

37

BK/WH

51

Ground

38

BK/WH

51

Ground

39

BK/WH

51

Ground

40

BK/WH

51

Ground

41

BK/WH

51

Ground

42-47

--

--

Not Used

48

BN/OG

732

Low Reference

BN

49-50

--

--

Not Used

51

L-BU

406

Ignition Coil (IC) Timing Control (2 and 3)

52

D-BU

436

Exhaust Gas Recirculation (EGR) Valve Control

53-63

--

--

Not Used

64

D-BU/WH

1876

Low Reference