GM Service Manual Online
For 1990-2009 cars only
Table 1: BCM Data List
Table 2: LDCM Data List
Table 3: SCM Data List

BCM Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition On and Engine Off / Doors, Hatch or Trunk, and Hood Closed / No Switches On / Vehicle in Park or Neutral

Current Power Mode

Input Data 1

Power Mode

Run

Driver Door Ajar Switch

Input Data 2

Open/Closed

Closed

Ignition 1

Input Data 1

On/Off

On

Ignition 2

Input Data 1

On/Off

On

Ignition 3

Input Data 1

On/Off

On

Key In Ignition

Input Data 1

Active/Inactive

Active

Key Out of Ignition

Input Data 1

Active/Inactive

Inactive

LDCM Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition On and Engine Off / Doors, Hatch or Trunk, and Hood Closed / No Switches On / Vehicle in Park or Neutral

Door Ajar

Inputs

Closed/Ajar

Closed

Memory 1 Select Switch

Inputs

Active/Inactive

Inactive

Memory 2 Select Switch

Inputs

Active/Inactive

Inactive

SCM Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition On and Engine Off / Doors, Hatch or Trunk, and Hood Closed / No Switches On / Vehicle in Park or Neutral

Battery 1

Data 1

0-26 Volts

Varies

Battery 2

Data 1

0-26 Volts

Varies

Calibration ID

Module Info

Calibration Number

Varies

Forward Position Motor Stop

Data 2

Volts

0-5 Volts

Front Down Position Motor Stop

Data 2

Volts

0-5 Volts

Front Up Position Motor Stop

Data 2

Volts

0-5 Volts

Front Vertical Position

Data 2

Counts

0-255

Horizontal Position

Data 2

Counts

0-255

Memory 1 Fore/Aft Motor Position

Data 2

Volts

0-5 Volts

Memory 1 Front Vertical Motor Position

Data 2

Volts

0-5 Volts

Memory 1 Rear Vertical Motor Position

Data 2

Volts

0-5 Volts

Memory 2 Fore/Aft Motor Position

Data 2

Volts

0-5 Volts

Memory 2 Front Vertical Motor Position

Data 2

Volts

0-5 Volts

Memory 2 Rear Vertical Motor Position

Data 2

Volts

0-5 Volts

Memory 3 Fore/Aft Motor Position

Data 2

Volts

0-5 Volts

Memory 3 Front Vertical Motor Position

Data 2

Volts

0-5 Volts

Memory 3 Rear Vertical Motor Position

Data 2

Volts

0-5 Volts

Position Sensor Reference

Data 1

0-26 Volts

Varies

Rear Down Position Motor Stop

Data 2

Volts

0-5 Volts

Rear Up Position Motor Stop

Data 2

Volts

0-5 Volts

Rear Vertical Position

Data 2

Counts

0-255

Reverse Position Motor Stop

Data 2

Volts

0-5 Volts

ROM ID

Module Info

ID Number

Varies

Seat Forward Switch

Inputs

Active/Inactive

Inactive

Seat Front Down Switch

Inputs

Active/Inactive

Inactive

Seat Front Up Switch

Inputs

Active/Inactive

Inactive

Seat Motor Current

Data 1

0-52.7 Amps

Varies

Seat Rear Down Switch

Inputs

Active/Inactive

Inactive

Seat Rear Up Switch

Inputs

Active/Inactive

Inactive

Seat Reverse Switch

Inputs

Active/Inactive

Inactive