GM Service Manual Online
For 1990-2009 cars only

Scan Tool Parameter

Data Display

Units Displayed

Typical Data Value

Operating Conditions: Ignition in the ON position, Bright Light Applied to the daytime running lamps (DRL) Ambient Light Sensor, Park Brake not set, Headlamp Switch in the OFF position, instrument panel (I/P) Lamp Switch in the OFF position

Ambient Light Sensor

Data

Volts

Varies

Battery Voltage

Data

Volts

Varies

BPP Sensor

Data

Volts

Varies

Inputs

Flash to Pass Switch

Inputs

ON/OFF

OFF

Hazard Switch Signal

Inputs

ON/OFF

OFF

Headlamp Off Switch

Inputs

Active/Inactive

Inactive

High Beam Switch

Inputs

ON/OFF

OFF

Interior Light Switch

Inputs

ON/OFF

OFF

Interior Lights Power

Inputs

Active/Inactive

Active

LF Door Open Switch

Inputs

Open/Closed

Closed

Left Turn Signal

Inputs

ON/OFF

OFF

Liftgate Ajar Switch

Inputs

Ajar/Closed

Closed

Low Beam Switch

Inputs

ON/OFF

OFF

LR Door Open Switch

Inputs

Open/Closed

Closed

RF Door Open Switch

Inputs

Open/Closed

Closed

Right Turn Signal

Inputs

ON/OFF

OFF

RR Door Open Switch

Inputs

Open/Closed

OFF

Park Brake Switch

Inputs

Released/Set

OFF

Park Lamp Switch

Inputs

ON/OFF

OFF

Outputs

Backup Lamps

Outputs

ON/OFF

OFF

Brake Applied Output Signal

Outputs

ON/OFF

OFF

High Beam Relay

Outputs

ON/OFF

OFF

Instrumentation Backlight Dimming Panel

Outputs

ON/OFF

OFF

Interior Lamp Output

Outputs

ON/OFF

OFF

Interior Lights Power

Outputs

ON/OFF

OFF

LF Turn Lamp/DRL Status

Outputs

ON/OFF

OFF

Low Beam Relay Command

Outputs

ON/OFF

OFF

LR Stop/Turn Signal Lamp

Outputs

ON/OFF

OFF

Park Lamp Relay

Outputs

ON/OFF

OFF

RF Turn Lamp/DRL Status

Outputs

ON/OFF

OFF

RR Stop/Turn Signal Lamp

Outputs

ON/OFF

OFF

BPPS System Data

BPP Sensor

Bass Data

Volts

Varies

BPP System Status

Bass Data

NO/YES

Yes

BPPS High During Learn

Bass Data

NO/YES

NO

BPPS Learned Home Position

Bass Data

Volts

Varies

BPPS Low During Learn

Bass Data

NO/YES

NO

BPPS Move During Learn

Bass Data

NO/YES

NO

BPPS Status

Bass Data

NO/YES

YES

Brake Lamp

Bass Data

ON/OFF

OFF

Learn in Progress

Bass Data

NO/YES

NO