Scan Tool Data Definitions - Data

Ambient Light: The scan tool displays LIGHT when the ambient light sensor voltage is between 2.2 - 4.7 volts. The scan tool displays DARK when the ambient light sensor voltage is between 0.2 - 1.3 volts.

Ambient Light Sensor: The scan tool displays the output voltage of the ambient light sensor based on the intensity of light detected. As the light intensity increases, the sensor displayed voltage increases. In the LIGHT state, a high voltage of approximately 2.6 volts is present and the Daytime Running Lamps (DRL) will be ON unless the parking brake is SET. In the DARK state, a low voltage of approximately 0.2 volts is present and the headlamps will be ON.

Battery Voltage: The scan tool displays the battery system voltage.

Courtesy Lamp Timer: The scan tool displays the seconds left before the BCM turns the courtesy lamp relay OFF. The BCM uses this feature to control the components attached to the illuminated entry, the remote illuminated entry and the exit lighting circuits.

Dimming Potentiometer: The scan tool displays the voltage value indicating the position of the IP dimmer switch (thumbwheel). The scan tool displays 0 volts when the headlamp switch is in the AUTO position and the daytime running lamps (DRL) are ON. The scan tool displays approximately 9.3 volts when either the park lamps or the headlamps are turned ON and the dome lamp switch is in the full bright position and approximately 3.8 volts in the full dim position.

Dusk: The scan tool displays Yes or No based on the intensity of light received by the ambient light sensor.

High Beam Input: The scan tool displays the voltage in order to determine the state of the high beam headlamps switch. The scan tool displays approximately 12 volts in the low beam position and approximately 1.1 volts in the high beam position.

Inadvertent Power Timer: The scan tool displays the seconds left before the BCM turns the inadvertent power relay OFF. The BCM uses this feature to protect the battery against inadvertent battery rundown caused by components that are part of the courtesy lamp circuit. The inadvertent power relay is supplied power by the BCM for approximately 1200 seconds, or about.