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

Numeric

0

Remote Start Attempts

BCM, Keyless/Remote Start Data

Counts

0 Counts

Remote Start Disable A

BCM, Remote Start Disable History Data

BTSI Fault, Theft Mode, Hazard On, Hood Ajar, Hood Fault, Ignition, Ext. Crank

None

Remote Start Disable B

BCM, Remote Start Disable History Data

Key in Ignition, Battery Voltage, Power Mode

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

L61 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 F-Terminal Signal

Engine Electrical, PCM

%

0%

GEN L-Terminal Signal

Engine Electrical, PCM

No Voltage, Voltage

Voltage

GEN L-Terminal Signal Command

Engine Electrical, PCM

On/Off

Off

Ignition 1 Signal

Engine Electrical, PCM

Volts

12.6 V

Starter Relay Circuit Status

Engine Electrical, PCM

Fault, No Fault

No Fault

Starter Relay Command

Engine Electrical, PCM

On/Off

Off

LX9 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

Generator Lamp Command

Engine Electrical, PCM

Yes/No

No

GEN L-Terminal Signal Command

Engine Electrical, PCM

On/Off

Off

Ignition 1 Signal

Engine Electrical, PCM

Volts

12.6 Volts

Starter Relay Command

Engine Electrical, PCM

On/Off

Off

Starter Relay Circuit History

Engine Electrical, PCM

OK/Fault

OK

Transmission Control Module (TCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

TR Sw.

Engine Data 2

Park, Reverse, Neutral, Drive 4, Drive 3, Drive 2, Drive 1

Park