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: 1501851  Size: CF

Connector Part Information

    • AMP 0-368434-2
    • 64-Way F ECU 64P Conn Assembly (32-bit-B) (BN)

Pin

Wire Color

Circuit No.

Function

K1

OG

440

Battery Positive Voltage

K2-K4

--

--

Not Used

K5

BK/WH

51

Ground (w/Octane Switch)

K6

D-GN/WH

817

Vehicle Speed Signal (Manual Transmission)

K7

D-BU

876

Rough Road Signal - W/ABS

K8-K11

--

--

Not Used

K12

D-BU

473

High Speed Cooling Fan Relay Control

K13

--

--

Not Used

K14

PU

1807

CAN Serial Data High

K15

YE

710

CAN Serial Data Low

K16

BN/WH

1669

Heated Oxygen Sensor (HO2S) 1 Heater Control

K17

OG

440

Battery Positive Voltage

K18

PK/D-BU

539

Ignition 1 Voltage

K19-K20

--

--

Not Used

K21

D-GN

602

Rough Road Sensor Signal (w/o ABS)

K22

L-BU

380

A/C Refrigerant Pressure (ACP) Sensor Signal

K23

--

--

Not Used

K24

D-GN

135

Engine Coolant Temperature (ECT) Sensor Gage Signal

K25

GY

121

Engine Speed Signal

K26-K27

--

--

Not Used

K28

D-GN/WH

335

Low Speed Cooling Fan Relay Control

K29

D-GN

67

A/C Clutch Relay Control

K30

WH

30

Fuel Level Sensor Signal

K31

--

--

Not Used

K32

PU

2000

Serial Data

K33

--

--

Not Used

K34

PU/WH

632

Low Reference

K35

D-GN/WH

762

A/C Request Signal

K36

PU

1670

Heated Oxygen Sensor (HO2S) 2 Signal

K37-K47

--

--

Not Used

K48

L-BU/BK

1986

Evaporative Emissions (EVAP) Canister Vent Solenoid Control

K49

--

--

Not Used

K50

GY

605

5-Volt Reference

K51

GY

1936

Fuel Level Sensor Signal

K52

YE/D-GN

890

Fuel Tank Pressure Sensor Signal

K53

L-GN

413

Low Reference

K54

L-GN

465

Fuel Pump Relay Control

K55-K63

--

--

Not Used

K64

BN/WH

419

Mulfunction Indicator Lamp (MIL) Control

Engine Control Module (ECM) M


Object Number: 1466972  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

M1

L-BU

406

Ignition Coil (IC) Timing Control 1 and 4

M2

BN/BK

1671

Heated Oxygen Sensor (HO2S) 2 Heater Control

M3

GY

120

Fuel Pump Supply Voltage

M4

WH

428

Evaporative Emissions (EVAP) Canister Purge Solenoid Control

M5

YE/BK

1868

Low Reference

M6

GY

417

Throttle Position (TP) Sensor Signal

M7

GY

472

Intake Air Temperature (IAT) Sensor Signal

M8

D-BU/WH

432

Manifold Absolute Pressure (MAP) Sensor Signal

M9

WH/BK

1456

Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal

M10

--

--

Not Used

M11

D-GN/WH

844

Fuel Injector 4 Control

M12

GY

1653

Heated Oxygen Sensor (HO2S) 1 Low Reference

M13

BN

1747

Idle Air Control (IAC) A High Control

M14

WH

444

Idle Air Control (IAC) B Low Control

M15

YE

1748

Idle Air Control (IAC) A Low Control

M16

L-BU/BK

1688

5-volt Reference

M17

--

--

Not Used

M18

YE/BK

496

Knock Sensor Signal

M19

D-GN

435

Exhaust Gas Recirculation (EGR) Solenoid Valve Control

M20

--

--

Not Used

M21

D-BU/WH

1869

Crankshaft Position (CKP) Sensor Signal

M22

BN/WH

1745

Fuel Injector 2 Control

M23

--

--

Not Used

M24

D-GN/BK

1746

Fuel Injector 3 Control

M25

YE/D-BU

1744

Fuel Injector 1 Control

M26

PU

633

Camshaft Position (CMP) Sensor Signal

M27

--

--

Not Used

M28

L-GN

410

Engine Coolant Temperature (ECT) Sensor Signal

M29

D-GN/RD

1665

Heated Oxygen Sensor (HO2S) 1 Signal

M30

PU/WH

1749

Idle Air Control (IAC) Coil B High Control

M31

--

--

Not Used

M32

D-GN/WH

416

5-volt Reference

M33

L-BU

406

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

M34

--

--

Not Used

M35

D-GN/WH

423

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

M36

--

--

Not Used

M37

BK/WH

51

Ground

M38

BK/WH

51

Ground

M39

BK/WH

51

Ground

M40

BK/WH

51

Ground

M41

BK/WH

51

Ground

M42-M47

--

--

Not Used

M48

OG/BK

469

Low Reference

M49-M50

--

--

Not Used

M51

D-GN/WH

423

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

M52

D-GN

435

Exhaust Gas Recirulation (EGR) Valve Control

M53-M63

--

--

Not Used

M64

BK

808

Low Reference