GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Powertrain Control Module (PCM)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, Engine OFF

Auto. Learn Counter

VTD Data

Counts

Varies

Auto. Learn Timer

VTD Data

Minutes

0-10

Fail Enable Counter

VTD Data

Counts

Varies

First Key Flag

VTD Data

On/Off

Off

Left Rear Door Ajar Switch

Inputs

Closed/Ajar

Closed

LF Door Ajar Switch

Inputs

Door Closed/Ajar

Door Closed

LF Key Cylinder Lock Switch

Inputs

Idle/Lock/Unlock/Invalid

Idle

No. of Learned Key Codes

VTD Data

1-10

2

Passkey Power Mode

VTD Data

On/Off

On

Right Rear Door Ajar Switch

Inputs

Closed/Ajar

Closed

RF Door Ajar Switch

Inputs

Door Closed/Ajar

Door Closed

RF Key Cylinder Lock Switch

Inputs

Idle/Lock/Unlock/Invalid

Idle

Tamper Flag

VTD Data

On/Off

Off

VTD Fail Enable

VTD Data

On/Off

Off

VTD States

VTD Data

Standby/Learn First Key/Read Key Code/Valid Key Code/Learn Pending/Learn More Keys/No Coded Key/Invalid Key Code/Relearn Wait/Relearn Off/Read Code/Fail Enable/Fail Pending

Valid Key Code

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, Engine OFF

Vehicle Security Status

Engine Data

Fuel Enabled, Fuel Disabled, Fuel Off for Ign, Learn Timer On, Fail Enable

Fuel Enabled