GM Service Manual Online
For 1990-2009 cars only

Object Number: 31454  Size: CF

Connector Part Information

    • 12160779
    • PCM 32 Way Brown (C1) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

C1

--

--

Not Used

--

--

--

C2

DK GRN/WHT

762

A/C Request

A

--

No A/C

C3

--

--

Not Used

--

--

--

C4

TAN

472

IAT Signal

A

P0113

--

C5

LT BLU

486

APP (2) Signal

C

P0222

--

C6

YEL

505

Glow Plug Relay Ccontrol

B

P0380

NO/Hard Start

C7

RED/BLK

1228

Pressure Control Solenoid Valve (Hi)

C

--

--

C8

YEL

1578

Fuel Temperature

E

P0183

--

C9

YEL/BLK

1227

TFT Temperature

L

--

--

C10

--

--

Not Used

--

--

--

C11

YEL

410

ECT Signal

A

P0118

Long Crank Times and Poor Shift Quality

C12

GRY/BLK

433

EGR Control Pressure/Baro Signal

B

P0406

No EGR, Black Smoke On Hard Acceleration

C13

RED

313

Closure Signal

E

P1217

Poor Performance

C14

LT GRN

432

Boost Sensor Signal

B

P0238

Poor Performance

C15

LT BLU/WHT

1229

Pressure Control Solenoid Valve (Lo)

D

--

--

C16

--

--

Not Used

--

--

--


Object Number: 31454  Size: CF

Connector Part Information

    • 12160779
    • PCM 32 Way Brown (C1) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

D1

BLU/WHT

1231

Transmission Input Speed Signal

B

--

--

D2

GRY/BLK

1694

4WD Low Indicator Signal

B

--

--

D3

YEL/BLK

596

APP (3) 5 Volt Ref.

E

P0228

--

D4

DK GRN

487

APP (3) Signal

K

P0227

--

D5

GRY

120

Fuel Lift Pump Signal

B

P0231

Poor Performance during Heavy Acceleration or Pulling Heavy Loads

D6

GRY

720

APP (3) Ground

J

P0228

--

D7

DK BLU

507

Glow Plug Signal

2

P0380

--

D8

GRN/WHT

465

Fuel Lift Pump Control

B3

P0231

Poor Performance during Heavy Acceleration or Pulling Heavy Loads

D9

PNK/BLK

632

Pump Cam, HIGH Res. and Fuel Temperature GroundP

D

--

No Start, Multible DTC's

D10

GRY/BLK

87

Cruise Resume/Accel Reques

A15

P0567

No Resume/Accel Request

D11

RED/BLK

1230

Transmission Input Speed Signal (Lo)

A

--

--

D12

WHT/BLK

598

APP (1) 5 Volt Ref.

G

P123

--

D13

GRY

416

Boost, Crank and EGR 5 Volt Ref.

C

--

Multible DTC's

D14

GRY

464

Pump Cam and High Res. 5 Volt Ref.

A

--

No Start, Multible DTC's

D15

--

--

Not Used

--

--

--

D16

--

--

Not Used

--

--

--

PCM 24 Way Brown (C2) Connector


Object Number: 31460  Size: CF

Connector Part Information

    • 12110244
    • PCM 24 Way Brown (C2) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

A1

BLK

491

Closure Ground

C

--

Back up Fuel

A2

ORN

1799

High Res. Signal

C

P0370, P0335

Back up Fuel

A3

BRN

437

Transmission Input Speed Signal

13

--

--

A4

BRN/WHT

633

IPump Cam Sensor Signal

B

P0251, P0370

Back up Fuel

A5

YEL

573

Crankshaft Position Sensor Signal

A

P0335

Back up Fuel

A6

DK GRN

389

VSS Signal

--

P0501

--

A7

RED/BLK

1031

Injection Injection Stepper Motor (HI)

D

P0216

Combustion Noise

A8

TAN/BLK

1030

Injection Timing Stepper Motor (LO)

A

P0216

Combustion Noise

A9

ORN/BLK

1032

Injection Timing Stepper Motor (LO)

B

P0216

Combustion Noise

A10

YEL/BLK

1033

Injection Timing Stepper Motor (HI)

C

P0216

Combustion Noise

A11

GRY

397

Cruise ON/OFF Signal

A12

--

No Cruise Control

A12

PPL

719

APP (2) Ground

B

P0222, 1125

Poor Performance


Object Number: 31460  Size: CF

Connector Part Information

    • 12110244
    • PCM 24 Way Brown (C2) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

B1

BRN

718

APP (1) Ground

A

P0122, P1125

--

B2

BK BLU

485

APP (1) Signal

F

P0122

--

B3

BLK/WHT

1695

Front Axle Switch Signal

--

--

--

B4

RED

1226

TR Switch A

N

--

--

B5

DK BLU

1225

TR Switch B

R

--

--

B6

PNK

1224

TR Switch C

P

--

--

B7

--

--

PTO (1360 RPM)

--

--

--

B8

--

--

PTO (1070 0 RPM)

--

--

--

B9

PPL

420

Cruise Control Brake Switch

E

P0571

No Cruise

B10

WHT

17

Brake Switch

A

P0571

No Cruise

B11

DK BLU

84

Cruise Set/Coast Signal

A14

P0568

No Cruise

B12

BLK

452

Sensor Ground (Boost, EGR, ECT, IAT, Fuel Temp., Trans Temp and Crank Sensor)

--

--

Multible DTC


Object Number: 31454  Size: CF

Connector Part Information

    • 12110207
    • PCM 32 Way Blue (C3) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavity

DTC(s) Affected

Possible Symptoms From a Faulty Circuit

C1

--

--

Not Used

--

--

--

C2

GRY

597

APP (2) 5 Volt Ref.

D

P0222, P1125

Poor Performance

C3

LT GRN

260

Fuel Inject Signal

A

--

--

C4

LT GRN

1222

Shift Solenoid (1-2)

A

--

No 1-2 Shift

C5

BRN

418

TCC PWM

U

--

Poor Fuel Economy

C6

YEL/BLK

1223

Shift Solenoid (2-3)

B

--

No 2-3 Shift

C7

--

--

Not Used

--

--

--

C8

PPL

1807

Class 2 Communication

2

--

No Scan Tool Communications

C9

--

--

Not Used

--

--

--

C10

--

--

Not Used

--

--

--

C11

PNK

439

Ignition

--

--

--

C12

PNK

439

Ignition

--

--

 

C13

ORN

440

Battery

--

--

 

C14

BRN/WHT

419

MIL Control Control

23

P1641

No MIL

C15

DK BLU/WHT

259

ESO Control

A

P0215

No Start

C16

GRY

435

EGR Solenoid Control

B

P1655, P0404

No EGR, Black Smoke On Hard Acceleration


Object Number: 31454  Size: CF

Connector Part Information

    • 12110207
    • PCM 32 Way Blue (C3) Connector

Pin

Wire Color

Circuit No.

Function

Component Connector Cavaity

DTC(s) Affected

Possible Symptoms From a Faulty Cirtuit

D1

--

--

Not Used

--

--

--

D2

--

--

Not Used

--

--

--

D3

LT GRN

260

Fuel Inject Control

A

--

--

D4

--

--

Not Used

--

--

--

D5

DK GRN/WHT

459

A/C Enable

--

--

No A/C

D6

BLK/WHT

451

Ground

--

--

--

--

D7

TAN/WHT

551

Ground

--

--

--

D8

--

--

Not Used

--

--

--

D9

--

--

Not Used

--

--

--

D10

--

--

Not Used

--

--

--

D11

WHT/BLK

176

Service Throttle Soon Lamp Control

21

P1654

No Service Throttle Soon Lamp

D12

WHT

257

EGR Vent Control

B

P1653

No EGR

D13

ORN

440

Battery

--

--

--

D14

YEL

258

Wastegate Solenoid Control

B

P1656

Poor Performance

D15

DK BLU/WHT

259

ESO Solenoid Control

A

P0215

No Start

D6

--

--

Not Used

--

--

--