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 (2.2-4.7 volts) is present and the DRL will be ON. In the DARK state, a low voltage (0.2-1.3 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 dome lamp switch (thumbwheel). The scan tool displays 0 (zero) volts when the headlamp switch is in the AUTO position and the Daytime Running Lamps (DRL) are ON. The scan tool displays 10.5 volts when either the park lamps or the headlamps are turned ON and the dome lamp switch is in the FULL BRIGHT position.

HIGH BEAM INPUT: The scan tool displays the voltage in order to determine the state of the high beam headlamps. The scan tool displays 12.2 volts with the low beams ON and 0.8 volts with the high beams ON.

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 2400 seconds (approximately 40 minutes), after the ignition is turned OFF.

RETAINED ACCESSORY POWER (RAP) TIMER: The scan tool displays the seconds left before the BCM turns the RAP relay OFF. The BCM uses this feature to allow the operation of the radio and the power windows for up to 1198 seconds (approximately 20 minutes), after the ignition is turned OFF. After the time has elapsed or the door is opened the BCM will open the ground circuit for the RAP relay.