Scan Tool Data Definitions

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

2WD High Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the 2WD high indicator light On.
4WD High Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the 4WD high indicator light On.
4WD Low Active: The scan tool displays Yes or No. This parameter indicates Yes when the transfer case is currently in the 4WD low lock mode.
4WD Low Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the 4WD low indicator light On.
ATC Application: The scan tool displays a numeric value. This parameter indicates the model number assigned to the transfer case.
ATC Software ID: The scan tool displays an alphanumeric value. This parameter indicates the numbers or characters assigned to the current version of software used in the transfer case shift control module.
Auto 4WD Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the auto 4WD indicator light On.
Battery Voltage: The scan tool displays a range of 0-25.5 volts. This parameter indicates the voltage measured by the transfer case shift control module at the transfer case shift control module battery feed.
Current Slip Adapts: The scan tool displays a numeric value. This parameter indicates corrective adjustments made by the transfer case shift control module for wheel slip events.
Encoder Gear Position: The scan tool displays the mode the transfer case is currently in.
Encoder Return Voltage: The scan tool displays a range of 0-7.5 volts. This parameter indicates the voltage measured by the transfer case shift control module at the encoder signal return.
Encoder Supply Voltage: The scan tool displays a range of 0-7.5 volts. This parameter indicates the voltage measured by the transfer case shift control module at the encoder power supply.
Front Axle Requested: The scan tool displays Yes or No. This parameter indicates Yes if the transfer case shift control module requests the front axle switch On.
Front Axle Switch: The scan tool displays Locked or Unlocked. This parameter indicates the feedback states of the front propshaft.
Front Propshaft Speed: The scan tool displays a range of 0-8,192 RPM. This parameter indicates the rotational speed of the front propshaft.
Ign. Cycles Since Last Current DTC: The scan tool displays a numeric value. This parameter indicates how many ignition cycles have occurred since last current DTC was set.
Mode Switch Return Voltage: The scan tool displays a range of 0-5 volts. This parameter indicates the return voltage from the transfer case shift control switch.
Mode Switch Selected: The scan tool displays the current mode selected. This parameter indicates the transfer case shift control switch button currently depressed by the driver.
Motor A Current: The scan tool displays Amps. This parameter indicates current flow when the motor moves one of two directions.
Motor B Current: The scan tool displays Amps. This parameter indicates current flow when the motor moves one of two directions.
Neutral Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the neutral indicator light On.
Rear Propshaft Speed: The scan tool displays a range of 0-8,192 RPM. This parameter indicates the rotational speed of the rear propshaft.
Service 4WD Lamp: The scan tool displays On or Off. This parameter indicates On if the transfer case shift control module commands the Service 4WD lamp, or message, On.
Slip Adapt PWM: The scan tool displays a range of 0-100 percent. This parameter indicates the duty cycle applied to the transfer case encoder motor.
Total Slippage: The scan tool displays a range of 0-8,192 RPM. This parameter indicates the total slippage of both the front and rear propshafts.
Transfer Case Lock: The scan tool displays Enabled or Disabled. This parameter indicates Enabled if the transfer case shift control module commands the transfer case motor brake On.