BCM Scan Tool Data Definitions

The BCM Scan Tool Data Definitions contains a brief description of all Lighting System related BCM parameters available on the scan tool.

Brake Pedal Data List

Stop Lamp Relay Command: The scan tool displays ON/OFF. When the BCM detects the stop lamps are applied, the scan tool will display ON.

BCM Data List

Stop Lamp Switch Status: The scan tool displays volts (counts). The voltage level (counts) varies as the brakes are applied.

BCM Inputs

Ambient Light Sensor C67-HVAC Manually equipped vehicles only: The Ambient Light sensor inputs the light level status to the BCM. The daylight light levels are Day/Night/Unknown/Invalid.

Ambient Light Sensor C67-HVAC Manually equipped vehicles only: The Ambient Light Sensor defines the light level to a voltage between 0 to 5 volts.

Flash to Pass: The scan tool displays Active/Inactive. When the multifunction switch is placed on the FTP position, the scan tool will display Active.

Front Fog Lamp Switch: The scan tool displays Active/Inactive. When the fog lamp switch is placed in the ON position, the scan tool will display Active.

Hazard Lamp Switch:  The scan tool displays Active/Inactive. When the hazard switch is placed in the ON position, the scan tool will display ON.

Headlamp Switch:  The scan tool displays Active/Inactive. When the headlamp switch is placed in the ON position, the scan tool will display ON.

Headlamp OFF Switch: The scan tool displays ON/OFF. When the headlamp switch is placed in the OFF position, the scan tool will display ON.

High Beam Select Switch: The scan tool displays ON/OFF. When the headlamp dimmer switch is placed in the HIGH position, the scan tool will display ON.

Left Turn Signal Switch: The scan tool displays Inactive/Active. When the turn signal switch is placed in the LEFT turn position, the scan tool will display Active.

Left Front Turn Signal: The scan tool displays ON/OFF. When the left front turn signal is placed in the ON position, the scan tool will display ON.

Left Rear Turn Signal: The scan tool displays ON/OFF. When the left rear turn signal is placed in the ON position, the scan tool will display ON.

Low Beam Relay Command: The scan tool displays ON/OFF. When the headlamp dimmer switch is placed in the LOW position, the scan tool will display ON.

Park Lamp Relay Command: The scan tool displays ON/OFF. When the headlamp switch is in the PARK position, the scan tool will display ON.

Park Lamp Switch: The scan tool displays ON/OFF. When the headlamp switch is in the PARK position, the scan tool will display ON.

Right Turn Signal Switch: The scan tool displays Inactive/Active. When the turn signal switch is placed in the right turn position, the scan tool will display Active.

BCM Outputs

Backup Lamps: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the backup lamps are turned ON.

DRL Relay Command: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the DRL lamps are turned ON.

Front Fog Lamp Relay Command: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the fog lamps are turned ON.

High Beam Relay Command: The scan tool displays ON/OFF. When the turn signal multi-function switch is placed in the High Beam position, the scan tool will display ON.

LF Turn Signal Lamp: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left front turn signal is turned ON.

LR Turn Signal Lamp: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the left rear turn signal is turned ON.

Low Beam Relay Command: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the low beam headlamps are turned ON.

Park Lamp Relay: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the park lamps are turned ON.

RF Turn Signal: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the right front turn signal is turned ON.

RR Turn Signal: The scan tool displays ON/OFF. This output of the BCM is displayed as ON when the right rear turn signal is turned ON.