Scan Tool Data Definitions

4WD High Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the rear 4WD high indicator light On.
4WD High Lock Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the rear 4WD high lock indicator 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 Lock Indicator Light: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the rear 4WD low lock indicator light On.
ATC Application: The scan tool displays a numeric value. This parameter indicates the model number assigned to the transfer case.
Encoder Circuits A, B, C, and P: The scan tool displays On or Off. If a high voltage is detected then the circuit is Off. If the encoder motor grounds the circuit and pulls the voltage low then the circuit is On. The encoder circuits allow the transfer case shift control module to determine what position the transfer case is in.
Encoder Gear Position: The scan tool displays the mode the transfer case is currently in.
Encoder Supply Voltage: The scan tool displays a range from 0-25 volts. This parameter indicates the voltage supplied to the encoder motor.
GM Part Number: The scan tool displays a numeric value. This parameter indicates the GM part number assigned to the module package (module, software, and calibrations).
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 High Side Driver: The scan tool displays On or Off. This parameter indicates On when battery voltage is applied to the Motor A circuit.
Motor A Low Side Driver: The scan tool displays On or Off. This parameter indicates On when ground is applied to the Motor A circuit.
Motor B High Side Driver: The scan tool displays On or Off. This parameter indicates On when battery voltage is applied to the Motor B circuit.
Motor B Low side Driver: The scan tool displays On or Off. This parameter indicates On when ground is applied to the Motor B circuit.
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 Axle Lock: The scan tool displays On or Off. This parameter indicates On when the transfer case shift control module commands the rear axle lock solenoid to be applied.
Rear Axle Lock Indicator Light: The scan tool displays On or Off. On is displayed when the transfer case shift control module requests the rear axle lock indicator On.
Rear Axle Lock Request: The scan tool displays On or Off. On is displayed when the transfer case shift control module receives a rear axle lock request from the switch or a scan tool.
Software ID: The scan tool displays a numeric value. This parameter indicates which version of software is currently installed in the transfer case shift control module.