GM Service Manual Online
For 1990-2009 cars only
Connector 1: Engine Control Module (ECM) C1
Connector 2: Engine Control Module (ECM) C2

Engine Control Module (ECM) C1


Object Number: 816165  Size: CH

Connector Part Information

  • OEM: 1928403379
  • Service: 88952771
  • Description: 64-Way F Bosch Connector (BK)

Terminal Part Information

  • Terminal/ Tray:1928498016/17
  • Core/Insulation Crimp: N/N
  • Release Tool/Test Probe: J38125-560/J35616-648 (L-BU)

Engine Control Module (ECM) C1

Pin

Wire Color

Circuit No.

Function

1

PU

420

Cruise Control Release Signal

2

RD/BK

380

A/C Refrigerant Pressure Sensor Signal

3

BK

2751

Low Reference

4-9

--

--

Not Used

10

TN

2501

High Speed GMLAN Serial Data Bus-

11

TN/WH

2500

High Speed GMLAN Serial Data Bus+

12

--

--

Not Used

13

D-GN

335

High Speed Cooling Fan Relay Control

14

--

--

Not Used

15

TN/BK

231

Engine Oil Pressure Switch Signal

16-17

--

--

Not Used

18

PU/WH

821

VSS Signal (M/T)

19

PK

639

Ignition 1 Voltage

20

OG

1440

Battery Positive Voltage

21

PU

1272

5-Volt Reference - A

22

GY

2700

5-Volt Reference - A

23-28

--

--

Not Used

29

D-GN/WH

465

Fuel Pump Relay Control

30

BN

5069

Main Relay Control

31

WH/BK

1164

5-Volt Reference - B

32-48

--

--

Not Used

49

D-BU

1161

APP Sensor 1 Signal

50

GY

397

Cruise On/Off Switch Signal (K34)

51

D-BU

84

Cruise Set/Coast Switch Signal (K34)

52

--

--

Not Used

53

BN

1271

Low Reference

54

GY/BK

87

Cruise Resume/Accel Switch Signal (K34)

55

--

--

Not Used

56

D-GN/WH

459

Low Reference

57

D-BU

473

Low Speed Cooling Fan Relay Control

58

--

--

Not Used

59

BN/WH

2960

Keyword Serial Data

60

--

--

Not Used

61

L-BU

1162

APP Sensor 2 Signal

62-63

--

--

Not Used

64

TN

1274

Low Reference

Engine Control Module (ECM) C2


Object Number: 816165  Size: CH

Connector Part Information

  • OEM: 1928403386
  • Service: 88956567
  • Description: 64-Way F Bosch Connector (BK)

Terminal Part Information

  • Terminal/ Tray:1928498016/17
  • Core/Insulation Crimp: N/N
  • Release Tool/Test Probe: J38125-560/J35616-648 (L-BU)

Engine Control Module (ECM) C2

Pin

Wire Color

Circuit No.

Function

1

YE

573

CKP Sensor Signal

2

PU

574

Low Reference

3

L-BU/BK

844

Fuel Injector 4 Control

4-6

--

--

Not Used

7

BK

1744

Fuel Injector 1 Control

8

--

--

Not Used

9

D-GN/WH

428

EVAP Canister Purge Solenoid Control

10

PK/BK

1746

Fuel Injector 3 Control

11

--

--

Not Used

12

OG/BK

469

Low Reference

13

BN

582

TAC Motor Control 2

14

BN

582

TAC Motor Control 2

15

YE

581

TAC Motor Control 1

16

YE

581

TAC Motor Control 1

17

--

--

Not Used

18

D-BU

496

KS Signal

19

TN

472

IAT Sensor Signal

20

--

--

Not Used

21

D-GN

676

HO2S Heater Low Control - Sensor 1

22

GY

1716

KS Signal

23-25

--

--

Not Used

26

PU

486

TP Sensor 2 Signal

27

WH

423

IC Timing Control 1-4

28-30

--

--

Not Used

31

RD

225

Generator Turn On Signal

32

--

--

Not Used

33

RD

1792

Drain Wire

34

L-GN/BK

1745

Fuel Injector 2 Control

35

L-GN

432

MAP Sensor Signal

36

BK/WH

1704

Low Reference

37

--

--

Not Used

38

BK

2761

Low Reference

39

BK

2760

Low Reference

40

--

--

Not Used

41

YE

410

ECT Sensor Signal

42

PU

1589

Fuel Level Sensor Signal

43

BK

2752

Low Reference

44

BK/WH

1423

HO2S Heater Low Control - Sensor 2

45

GY

2701

5-Volt Reference - A

46

--

--

Not Used

47

WH

1310

EVAP Canister Vent Solenoid Control

48

--

--

Not Used

49

PU

1666

HO2S High Signal - Sensor 1

50

TN

1667

HO2S Low Signal - Sensor 1

51

PU/WH

1668

HO2S High Signal - Sensor 2

52

TN/WH

1669

HO2S Low Signal - Sensor 2

53

--

--

Not Used

54

BN/WH

633

CMP Sensor Signal

55

D-GN

485

TP Sensor 1 Signal

56

OG

406

IC Timing Control 2-3

57

L-BU/BK

1688

5-Volt Reference - B

58

GY

2704

5-Volt Reference - B

59

D-GN

890

FTP Sensor Signal

60

BK

2759

Low Reference

61

GY

2709

5-Volt Reference - A

62

--

--

Not Used

63

WH

5290

Ignition 1 Voltage

64

WH

5290

Ignition 1 Voltage