GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Ignition ON/Engine OFF/Vehicle in PARK/Headlamps in AUTO

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Julian Date of Build

Module Information 1

Numeric

Varies

Manufacture Enable Counter

Module Information 1

0-255

0

Module Part Number

Module Information 1

Numeric

Varies

Software Design Suffix

Module Information 1

Two Letters

Varies

Software Part Number

Module Information 1

Numeric

Varies

Battery Voltage

Data

Volts

Varies

Door Lock Relay Feedback

Input 1

ON/OFF

OFF (relay not energized)

Driver Door Jamb Switch

Input 1

ACTIVE/INACTIVE

ACTIVE (door open)

Horn Relay Input

Input 1

ACTIVE/INACTIVE

INACTIVE

Ignition 1

Input 1

ACTIVE/INACTIVE

ACTIVE

Ignition 3

Input 1

ACTIVE/INACTIVE

ACTIVE

Ignition Power Mode

Input 1

OFF/RUN/CRANK/ UNKNOWN

RUN

Last Remote Function Actuation Command Since Wake-Up

Input 1

None/Lock/Unlock/Panic/Manual Resynch/Fob Program/Diag Acknowledge/Diag Request

Unlock

Passenger Door Unlock Input

Input 1

ACTIVE/INACTIVE

INACTIVE

Remote Function Actuation Message Since Wake-Up

Input 1

NONE/PANIC/Active Unlock Fob# /Active Lock/Prog Mode Cancel/Prog Successful/Prog Mode Ack/Manual Resync

Actv Unlock Fob#

Courtesy Lamp Relay

Input 2

ON/OFF

OFF

Courtesy Lamp Relay

Outputs

ON/OFF

OFF

Door Lock Relay

Outputs

ON/OFF

OFF

Driver Door Unlock Relay

Outputs

ON/OFF

OFF

Horn Relay

Outputs

ON/OFF

OFF

Interior Lighting Mode

Outputs

None/Interior/Illuminated Entry/Exit Lighting/Remote Illuminated

Interior

Passenger Door Unlock Relay

Outputs

ON/OFF

OFF

Content Theft Lamp

Security Data

ON/OFF

OFF

Content Theft State

Security Data

ON/OFF

IDLE

Door Key Switch

Security Data

ACTIVE/INACTIVE

ACTIVE

Ignition 1

Security Data

ACTIVE/INACTIVE

ACTIVE

Ignition 3

Security Data

ACTIVE/INACTIVE

ACTIVE