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

Data Display/Ignition

Volts

12.6 Volts

Power Mode

Data Display/Ignition

Off, Accy., Run, Crank

Off

L61/LE5 Engine Control Module (ECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

Crank Request Signal

Engine Data Display / Electrical/Theft Data

Yes/No

No

GEN F-Terminal Signal

Engine Data Display / Electrical/Theft Data

%

0%

GEN L-Terminal Signal Command

Engine Data Display / Electrical/Theft Data

On/Off

Off

Ignition Accessory Signal

Engine Data Display / Electrical/Theft Data

On/Off

Off

Ignition 1 Signal

Engine Data Display / Electrical/Theft Data

Volts

12.6 Volts

Starter Relay Command

Engine Data Display / Electrical/Theft Data

On/Off

Off

LSJ Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

Crank Request Signal

Engine Data Display / Electrical/Theft Data

Yes/No

No

GEN F-Terminal Signal

Engine Data Display / Electrical/Theft Data

%

0%

GEN L-Terminal Signal

Engine Data Display / Electrical/Theft Data

Voltage/No Voltage

Voltage

Ignition Accessory Signal

Engine Data Display / Electrical/Theft Data

On/Off

Off

Ignition 1 Signal

Engine Data Display / Electrical/Theft Data

Volts

12.6 Volts

Starter Relay Command

Engine Data Display / Electrical/Theft Data

On/Off

Off