Scan Tool Data Definitions

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis 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.
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.
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 8 V reference circuit.
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.
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.
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.