GM Service Manual Online
For 1990-2009 cars only

BCM must be properly powered

Scan Tool Parameter

Units Displayed

Typical Data Value

Doors Battery Fd

Inactive/Active

Active

Electronics Battery Fd

Inactive/Active

Active

Electronics System Gnd

Inactive/Active

Active

Ignition 0

On/Off

Varies

Ignition 1

On/Off

Varies

Ignition 3

On/Off

Varies

Inadvert. Power Relay

On/Off

Varies

Loads Battery Fd

Inactive/Active

Active

Loads System Gnd

Inactive/Active

Active

Theater Dim 1 Ground

Inactive/Active

Inactive

Theater Dim 2 Ground

Inactive/Active

Inactive