GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Battery 1

Accessory

Volts

12.6 Volts

Engine Control Module (ECM) 2.2L (L61)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Clutch Depressed or Transmission in Park or Neutral

Generator L-Terminal

Outputs

Enabled/Disabled

Enabled

Generator F-Terminal DC

Outputs

%

17%

Ignition 1

Outputs

Volts

12.6 Volts

Engine Control Module (ECM) 3.0L (L81)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Clutch Depressed or Transmission in Park or Neutral

Generator L-Terminal

Inputs

High/Low

High

Ignition 1

Inputs

Volts

12.6 Volts