GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Driver Door Closed

Driver Door Ajar Sw.

Inputs

On/Off

Off

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Headlamp Switch OFF/Doors Closed

ABS Lamp

Inputs for Analog Dash

On/Off

Off

Calibration ID

Module Information 1

Numeric

Varies

Controlled Power

Data

Volts

Varies

Daily Serial Number

Module Information 2

Numeric

Varies

Dis. Information Reset Sw.

Inputs for Analog Dash

On/Off

Off

Display Information Sw.

Inputs for Analog Dash

On/Off

Off

Display Trip Reset Sw.

Inputs for Analog Dash

On/Off

Off

Engine Speed

Data

RPM

0 RPM

Fast Idle Input

Inputs for Analog Dash

On/Off

Off

Front Fog Lamp Switch

Inputs for Analog Dash

On/Off

Off

Fuel Door Release Sw.

Inputs for Analog Dash

On/Off

Off

Head Lamp Switch

Inputs for Analog Dash

On/Off

Off

Highbeam Switch

Inputs for Analog Dash

On/Off

Off

Ignition 1

Inputs for Analog Dash

On/Off

On

Ignition Counter

Data

Counts

Varies

Ignition Off Position

Inputs for Analog Dash

On/Off

Off

Incandescent Dim Pot

Data

1-160

Varies

Interior Lamp Switch

Inputs for Analog Dash

On/Off

Off

Julian Date of Build

Module Information 2

Year/Day

Varies

Key In Ignition

Inputs for Analog Dash

Yes/No

Yes

Last 4 Digits of Part No.

Module Information 1

Numeric

Varies

Low Brake Fluid Level

Data

0-5 Volts

5 Volts

Low Coolant Level

Inputs for Analog Dash

On/Off

Off

Lt. Turn Signal Indicator

Inputs for Analog Dash

On/Off

Off

Oil Pressure Lamp

Inputs for Analog Dash

On/Off

Off

Park Lamp Switch

Inputs for Analog Dash

On/Off

Off

PROM ID

Module Information 1

Numeric

Varies

Rear Fog Lamp Switch

Inputs for Analog Dash

On/Off

Off

Rt. Turn Signal Indicator

Inputs for Analog Dash

On/Off

Off

Steering Wheel Controls

Data

Idle

Top Left Up

Top Left Down

Bottom Left Up

Bottom Left Down

Top Right Up

Top Right Down

Bottom Right Up

Bottom Right Dwn

Idle

Steering Wheel Controls

Data

0-255

0

Trunk Release Switch

Inputs for Analog Dash

On/Off

Off

Twilight Delay

Data

0-255

Varies

Twilight Photo

Data

0-255

Varies

Twilight Switch

Inputs for Analog Dash

On/Off

Off

Vehicle Speed

Data

km/h (mph)

0 km/h (0 mph)

Washer Fluid Level

Inputs for Analog Dash

On/Off

Off

Wiper Activation Switch

Inputs for Analog Dash

On/Off

Off

Year Model Built

Module Information 2

Year

Varies

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling at Normal Operating Temperature/Transmission in Park

ECT Sensor

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

°C (°F)

90°C (194°F)

Engine Oil Level Switch

Engine Data 2

Engine Data 3

OK/Low

OK

Engine Oil Pressure Switch

Engine Data 3

OK/Low

OK

Engine Speed

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

RPM

650 RPM

Fuel Level

EVAP Data

Liters (gallons)

Varies

Odometer

Engine Data 3

kilometers (miles)

Varies with the mileage of the vehicle

Vehicle Speed Sensor

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

km/h (mph)

0 km/h (0 mph)