GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Driver Door Module (DDM)
Table 3: Driver Door Switch
Table 4: Passenger Door Module (PDM)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

RUN MODE ON

Battery Voltage Signal

Inputs

Volts

9-16 Volts

LF Door Ajar Switch

Inputs

Door Closed/Ajar

Door Closed

LF Door Open Switch

Inputs

Door Closed/Door Open/Key Off/Key On

Door Closed/Key On

LF Latch Solenoid Command

Outputs

Active/Inactive

Inactive

RF Door Ajar Switch

Inputs

Door Closed/Ajar

Door Closed

RF Door Open Switch

Inputs

Door Closed/Door Open/Key Off/Key On

Door Closed/Key On

RF Latch Solenoid Command

Outputs

Active/Inactive

Inactive

Driver Door Module (DDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

RUN MODE ON

Battery Voltage Signal

Data

Volts

9-16 Volts

Deadbolt Actuator Command

Data

Idle/Lock/Unlock/Invalid

Idle

Driver Mirror Fold Motor Command

Data

Idle/Extend/Retract

Idle

Driver Mirror Heater

Data

Active/Inactive

Inactive

Driver Mirror Motors Command

Data

Idle/Up/Down/Left/Right/Left Up/Left Down/Right Up/Right Down

Idle

Driver Mirror Horizontal Position

Data

Counts

25-230 Counts

Driver Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Driver Mirror Vertical Position

Data

Counts

15-225 Counts

Driver Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Driver Window Motor Command

Data

Idle/Up/Down

Idle

Driver Window Position

Data

Counts

Varies

Ext. Driver Door Handle Switch

Data

Active/Inactive

Inactive

Window Motor Sensor 1

Data

Active/Inactive

Inactive

Window Motor Sensor 2

Data

Active/Inactive

Inactive

Int. Driver Door Handle Switch

Data

Active/Inactive

Inactive

Lock Switch Indicator Command

Data

On/Off

Off

Memory 1 Mirror Horizontal Position

Data

Counts

25-230 Counts

Memory 1 Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Memory 1 Mirror Vertical Position

Data

Counts

15-225 Counts

Memory 1 Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Memory 2 Mirror Horizontal Position

Data

Counts

25-230 Counts

Memory 2 Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Memory 2 Mirror Vertical Position

Data

Counts

15-225 Counts

Memory 2 Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Window Normalization

Data

Yes/No

Yes

Driver Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

RUN MODE ON

Battery Voltage Signal

Data

Volts

9-16 Volts

Door Lock Switch

Data

Idle/Lock/Unlock

Idle

Driver LF Window Switch

Data

Idle/Up/Down/Express Down

Idle

Driver RF Window Switch

Data

Idle/Up/Down/Express Down

Idle

Memory Recall Switches

Data

Idle/Memory 1/Memory 2/Exit

Idle

Mirror Direction Switch

Data

Idle/Up/Down/Left/Right/Left Up/Left Down/Right Up/Right Down

Idle

Mirror Fold Switch

Data

Idle/Extend/Retract

Idle

Mirror Select Switch

Data

Off/Driver/Passenger

Off

Passenger Door Module (PDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

RUN MODE ON

Battery Voltage Signal

Data

Volts

9-16 Volts

Ext. Psgr. Door Handle Switch

Data

Active/Inactive

Inactive

Passenger Window Motor Command

Data

Idle/Up/Down

Idle

Front Psgr. Window Position

Data

Counts

Varies

Front Psgr. Window Switch

Data

Idle/Up/Down/Express Down

Idle

Window Motor Sensor 1

Data

Active/Inactive

Inactive

Window Motor Sensor 2

Data

Active/Inactive

Inactive

Int. Psgr. Door Handle Switch

Data

Active/Inactive

Inactive

Lock Switch Indicator Command

Data

On/Off

Off

Memory 1 Mirror Horizontal Position

Data

Counts

25-225 Counts

Memory 1 Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Memory 1 Mirror Vertical Position

Data

Counts

25-225 Counts

Memory 1 Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Memory 2 Mirror Horizontal Position

Data

Counts

25-225 Counts

Memory 2 Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Memory 2 Mirror Vertical Position

Data

Counts

25-225 Counts

Memory 2 Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Psgr. Mirror Fold Motor Command

Data

Idle/Extend/Retract

Idle

Psgr. Mirror Heater

Data

Active/Inactive

Inactive

Psgr. Mirror Horizontal Position

Data

Counts

25-225 Counts

Psgr. Mirror Horizontal Position

Data

Volts

0.5-4.5 Volts

Psgr. Mirror Motors Command

Data

Idle/Up/Down/Left/Right/Left Up/Left Down/Right Up/Right Down

Idle

Psgr. Mirror Vertical Position

Data

Counts

25-225 Counts

Psgr. Mirror Vertical Position

Data

Volts

0.5-4.5 Volts

Window Normalization

Data

Yes/No

Yes