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

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors, Hatch/Trunk and Hood CLOSED/No Switches Pressed/Vehicle in PARK or NEUTRAL

Backup Light Request

Input Data 1

Active/Inactive

Inactive

Driver Door Ajar Switch

Input Data 2

Open/Closed

Closed

Folding Top Ajar Switch (Convertible)

Input Data 2

Active/Inactive

Inactive

Hatch/Trunk Ajar

Input Data 2

Open/Closed

Closed

Hood Ajar (Export)

Input Data 2

Open/Closed

Closed

Ignition 1

Input Data 1

On/Off

On

Key In Ignition

Input Data 1

Active/Inactive

Active

Left Turn Signal Relay

Input Data 1

Active/Inactive

Inactive

Passenger Door Ajar Switch

Input Data 2

Open/Closed

Closed

PASS-Key® Resistor Signal

Data

0-5.0 Volts

Varies

PASS-Key State

Input Data 1

Monitor Key/Ignition Off

Monitor Key

Right Turn Signal Relay

Input Data 1

Active/Inactive

Inactive

Theft Deterrent State

Input Data 1

Active/Inactive/Fully Armed/Passive/Alarm

Inactive

Driver Door Module (DDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors, Hatch/Trunk and Hood CLOSED/No Switches Pressed/Vehicle in PARK or NEUTRAL

Door Key Unlock

Inputs

Active/Inactive

Inactive

Passenger Door Module (PDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors, Hatch/Trunk and Hood CLOSED/No Switches Pressed/Vehicle in PARK or NEUTRAL

Door Key Unlock

Inputs

Active/Inactive

Inactive

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Doors, Hatch/Trunk and Hood CLOSED/No Switches Pressed/Vehicle in PARK or NEUTRAL

PCM/VCM in VTD Fail Enable

Engine Data 3

Yes/No

No

VTD Auto. Learn Timer

Engine Data 3

Active/Inactive

Inactive

VTD Fuel Disable

Engine Data 3

Active/Inactive

Inactive

VTD Fuel Disable Until Ign. Off

Engine Data 3

Yes/No

No