GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: BCM powered and communicating with the scan tool.

Ignition Voltage

Data

9.0-15 Volts

12.8 Volts

Ignition Status

Data

On / OFF

On

Ignition Accessory

Data

On / OFF

On

Accessory Relay Command

Data

On / Off

On