GM Service Manual Online
For 1990-2009 cars only
Table 1: Automatic Transmission (MX4)
Table 2: Engine Speed Sensor (MX4)
Table 3: Park/ Neutral Position (PNP) and Back Up Lamps Switch C1 (MX4)
Table 4: Park/ Neutral Position (PNP) and Back Up Lamps Switch C2 (MX4)
Table 5: Park/ Neutral Position (PNP) Switch Module (MX4)
Table 6: Speedo Adapter (MX4)
Table 7: Transmission Control Module (TCM) C1 (MX4)
Table 8: Transmission Control Module (TCM) C2 (MX4)
Table 9: Turbine Shaft Speed Sensor (MX4)

Automatic Transmission (MX4)


Object Number: 258240  Size: CH

Connector Part Information

    • 12160280
    • 20 Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1222

Solenoid C Control

B

YEL/BLK

1223

Solenoid D Control

C

RED/WHT

911

Solenoid C, D, E Input

D

PNK

1224

Pressure Switch C Signal

E

RED

1226

Pressure Switch E Signal

F

DK BLU

1225

Pressure Switch D Signal

G

YEL/BLK

1227

Sump Temperature Sensor Signal

H

BLK

2762

Trans I.D. and Sump Temperature Sensor Return

J

BRN

418

Torque Converter Clutch Solenoid Control

K

LT GRN/BLK

918

Pressure Switch R Signal

L

LT BLU/WHT

1229

Solenoid A Voltage Supply

M

RED/BLK

1228

Solenoid A Control

N

PNK/BLK

904

Solenoid B Voltage Supply

P

BRN/WHT

908

Solenoid B Control

R

--

--

Not Used-Plugged

S

DK GRN/WHT

915

Torque Converter Clutch Supply Voltage

T

PPL

930

Trans I.D. and Sump Temperature Sensor Voltage Supply

U-V

--

--

Not Used-Plugged

W

ORN/BLK

910

Solenoid E Control

Engine Speed Sensor (MX4)


Object Number: 237066  Size: CH

Connector Part Information

    • 12162193
    • 2 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

RED/BLK

1230

Engine Speed Sensor Signal

B

DK BLU/WHT

1231

Engine Speed Sensor Ground

Park/ Neutral Position (PNP) and Back Up Lamps Switch C1 (MX4)


Object Number: 535900  Size: CH

Connector Part Information

    • 12129840
    • 7 Way F Metri-Pack 150/280 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used-Plugged

C

BRN

41

Battery Positive Voltage

D

BLK

2762

Ground

E

PPL

806

Crank Voltage

F

LT GRN

24

Back Up Lamps Supply Voltage

G

ORN/BLK

434

Switch Position Signal

Park/ Neutral Position (PNP) and Back Up Lamps Switch C2 (MX4)


Object Number: 535904  Size: CH

Connector Part Information

    • 12191757
    • 4 Way F Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

771

Switch A Position

B

GRY

773

Switch C Position

C

WHT

776

Switch P Position

D

YEL

772

Switch B Position

Park/ Neutral Position (PNP) Switch Module (MX4)


Object Number: 40419  Size: CH

Connector Part Information

    • 12015410
    • 6 Way P/C Edgeboard-STD

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RED

20

Module Control

C

--

--

Not Used

D

BLK/WHT

451

Module Ground

E

ORN

903

TCM Control

F

--

--

Not Used

Speedo Adapter (MX4)


Object Number: 73152  Size: CH

Connector Part Information

    • 12084945
    • 16 Way F Micro-Pack 100 (GRY)

Pin

Wire Color

Circuit No.

Function

A1

GRY/BLK

1467

Two Speed Rear Axle Shift Motor Relay Coil Control

A2-A8

--

--

Not Used

B1

PNK

39

Ignition 1 Voltage

B2

PPL/WHT

821

Replicated Vehicle Speed Sensor Input

B3

LT GRN/BLK

822

Not Used

B4

--

--

Not Used

B5

BLK/WHT

451

Ground

B6

--

--

Not Used

B7

YEL

400

Vehicle Speed Sensor Signal

B8

DK GRN

389

Vehicle Speed Signal (4000 Pulses Per Mile)

Transmission Control Module (TCM) C1 (MX4)


Object Number: 39787  Size: CH

Connector Part Information

    • 12129025
    • 32 Way F Micro-Pack 100 Series (CLR)

Pin

Wire Color

Circuit No.

Function

1

BLK

451

Ground

2

PNK

639

Ignition 1 Voltage

3

ORN

840

Battery Positive Voltage

4

PNK

639

Ignition 1 Voltage

5

BLK/WHT

451

Ground

6

--

--

Not Used-Plugged

7

PPL

1146

Exhaust Brake Enable Signal

8-9

--

--

Not Used-Plugged

10

YEL

1481

Secondary Shift Schedule Signal

11

TAN

1147

Shift Inhibit Signal

12

--

--

Not Used-Plugged

13

PNK

1905

Exhaust Brake Disable Control

14

ORN

903

Inverted Stop Lamps Switch Signal

15-19

--

--

Not Used-Plugged

20

DK GRN

901

Exhaust Brake/ Air Interlock Relay Control

21-24

--

--

Not Used-Plugged

25

GRY

1234

Check Trans Indicator Control

26

--

--

Not Used-Plugged

27

BRN

437

Vehicle Speed Signal (128000 Pulses Per Mile)

28

--

--

Not Used-Plugged

29

YEL

2361

J1939 Data Link

30

DK GRN

1049

Class 2 Serial Data Link

31

BLK/WHT

2363

J1939 Data Link Shield Ground

32

DK GRN

2362

J1939 Data Link

Transmission Control Module (TCM) C2 (MX4)


Object Number: 39787  Size: CH

Connector Part Information

    • 12129025
    • 32 Way F Micro-Pack 100 Series (RED)

Pin

Wire Color

Circuit No.

Function

1

PNK

1224

Pressure Switch C Signal

2

DK BLU

1225

Pressure Switch D Signal

3

RED

1226

Pressure Switch E Signal

4

LT GRN/BLK

918

Pressure Switch R Signal

5

BLK/WHT

771

Park/ Neutral Position and Back Up Lamps Switch Signal

6

YEL

772

Park/ Neutral Position and Back Up Lamps Switch Signal

7

GRY

773

Park/ Neutral Position and Back Up Lamps Switch Signal

8

WHT

776

Park/ Neutral Position and Back Up Lamps Switch Signal

9

--

--

Not Used-Plugged

10

YEL/BLK

1227

Sump Temperature Sensor Signal

11-12

--

--

Not Used-Plugged

13

ORN

1983

Tubine Shaft Speed Sensor Signal

14

LT BLU

1984

Tubine Shaft Speed Sensor Ground

15

PPL/WHT

821

Vehicle Speed Sensor Signal

16

LT GRN/BLK

822

Vehicle Speed Sensor Ground

17

RED/BLK

1230

Engine Speed Sensor Signal

18

DK BLU/WHT

1231

Engine Speed Sensor Ground

19

--

--

Not Used-Plugged

20

BLK

2762

Sump Temperature Sensor and Trans I.D. Return

21

PPL

930

Sump Temperature Sensor and Trans I.D. Signal

22

LT BLU/WHT

1229

Solenoid A Voltage Supply

23

RED/BLK

1228

Solenoid A Control

24

PNK/BLK

904

Solenoid B Voltage Supply

25

BRN/WHT

908

Solenoid B Control

26

LT GRN

1222

Solenoid C Control

27

YEL/BLK

1223

Solenoid D Control

28

ORN/BLK

910

Solenoid E Control

29

BRN

418

Turque Converter Clutch Control

30

--

--

Not Used-Plugged

31

RED/WHT

911

Solenoid C, D, E Voltage Supply

32

DK GRN/WHT

915

Turque Converter Clutch Voltage Supply

Turbine Shaft Speed Sensor (MX4)


Object Number: 237066  Size: CH

Connector Part Information

    • 12162193
    • 2 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1983

Turbine Shaft Speed Sensor Signal

B

LT BLU

1984

Turbine Shaft Speed Sensor Ground