GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Control Module (ECM) A (HV-240)
Table 2: Engine Control Module (ECM) B (HV-240)

Engine Control Module (ECM) A (HV-240)


Object Number: 1481265  Size: CF

Connector Part Information

    • PED 12129231
    • 32-Way Retainer Lock (GY)

Pin

Wire Color

Circuit Number

Function

1

BK/WH

51

Ground

2

BK/WH

51

Ground

3

YE/BK

496

Knock Sensor Signal

4

D-GN

411

Exhaust Gas Recirculation (EGR) Valve Control

5

--

--

Not Used

6

YE/BK

1868

Low Reference

7

D-BU

417

Throttle Position (TP) Sensor Signal

8

PK/BK

1746

Fuel Injector 3 Control

9

BK

1744

Fuel Injector 1 Control

10

BK/WH

252

Low Reference

11

YE

410

Engine Coolant Temperature (ECT) Sensor Signal

12

D-GN/RD

1665

Oxygen (O2) Sensor 1 Low Reference (Unleaded Only)

13

PU/WH

1749

Idle Air Control (IAC) Coil B High Control

14

--

--

Not Used

15

GY

416

5-Volt Reference

16

OG/BK

469

Low Reference

17

BK/WH

51

Ground

18

L-BU

406

Ignition Coil (IC) 1 and 4 Control

19

D-GN/WH

423

Ignition Coil (IC) 2 and 3 Control

20

D-GN/WH

428

Evaporative Emissions (EVAP) Canister Purge Solenoid Control

21

D-BU/WH

1869

Crankshaft Position (CKP) Sensor Signal

22

L-GN/BK

1745

Fuel Injector 2 Control

23

BN

472

Intake Air Temperature (IAT) Sensor 5-Volt Reference

24

L-GN

432

Manifold Absolute Pressure (MAP) Sensor Signal

25

BN/WH

633

Camshaft Position (CMP) Sensor Signal

26

L-BU/BK

844

Fuel Injector 4 Control

27

GY

1653

Oxygen (O2) Sensor 1 Signal (Unleaded Only)

28

BN

1747

Idle Air Control (IAC) Coil A High Control

29

WH

444

Idle Air Control (IAC) B Low Control

30

YE/WH

1748

Idle Air Control (IAC) A Low Control

31

L-BU/BK

1688

5-Volt Reference Voltage

32

BK/YE

808

Low Reference

Engine Control Module (ECM) B (HV-240)


Object Number: 1468388  Size: CF

Connector Part Information

    • PED 12129232
    • 32-Way Retainer Lock (WH)

Pin

Wire Color

Circuit Number

Function

1

PU/WH

632

Low Reference

2

OG

440

Battery Positive Voltage

3

PK/D-BU

539

Ignition 1 Voltage

4-6

--

--

Not Used

7

L-BU

380

A/C Refrigerant Pressure (ACP) Sensor Signal

8

L-BU

722

Octane Switch Signal

9

GY

121

Engine Speed Signal

10

D-GN/WH

762

A/C Request Signal

11

--

--

Not Used

12

D-BU

473

High Speed Cooling Fan Relay Control

13

WH/BK

--

Intake Manifold Tuning Valve Solenoid Control

14

PU

1807

CAN Serial Data High

15

PU

2000

Keyword Serial Data

16

--

--

Not Used

17

GY

605

5-Volt Reference

18

OG

440

Battery Positive Voltage

19

GY

1936

Fuel Gage

20-21

--

--

Not Used

22

PU

723

Octane Switch Signal

23

D-GN/WH

817

Vehicle Speed Signal (Manual Transmission)

24

D-GN

135

Engine Coolant (ECT) Sensor Gage Signal

25

--

--

Not Used

26

D-GN/WH

465

Fuel Pump Relay Control

27

D-GN/WH

335

Low Speed Cooling Fan Relay Control

28

D-GN

67

A/C Compressor Clutch Coil Supply Voltage

29

--

--

Not Used

30

YE

710

CAN Serial Data Low

31

WH

30

Fuel Level Sensor Signal

32

BN/WH

419

Malfunction Indicator Lamp (MIL) Control