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 Voltage Signal

BCM

Volts

12.6 Volts

Hood Ajar Switch

BCM, Keyless/Remote Start Data

Closed/Ajar

Closed

Idle Boost Level

BCM

Amps

0 Amps

Remote Start Attempts

BCM, Keyless/Remote Start Data

Counts

0 Counts

Remote Start Disable A

BCM, Remote Start Disable History Data

None, BTSI Fault, Theft Mode, Invalid, Hazard On, Hood Ajar, Hood Fault, Ignition, Ext. Crank

None

Remote Start Disable B

BCM, Remote Start Disable History Data

None, Key in Ignition, Battery Voltage, Abort, Power Mode, Invalid

None

Remote Start Equipped

BCM, Keyless/Remote Start Data

Enable/Disable

Enable

Remote Start Equipped

BCM, BCM ECU Configuration

Enable/Disable

Enable

Remote Starts Remaining

BCM, Keyless/Remote Start Data

Counts

2 Counts

Remote Start Request

BCM, Keyless/Remote Start Data

Yes/No

No

Remote Start Timer

BCM, Keyless/Remote Start Data

Counts

Varies

Run/Crank Relay

BCM, Keyless/Remote Start Data

On/Off

On

Run/Crank Relay Command

BCM, Keyless/Remote Start Data

On/Off

On

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Crank Request Signal

Engine Electrical, PCM

Yes/No

No

GEN Lamp Command

Engine Electrical, PCM

On/Off

Off

GEN L-Terminal Signal Command

Engine Electrical, PCM

On/Off

Off

Ignition 1 Signal

Engine Electrical, PCM

Volts

12.6 V

Starter Relay Command

Engine Electrical, PCM

On/Off

Off

Starter Relay Circuit History

Engine Electrical, PCM

OK/Open/Short/Invalid State

OK