For 1990-2009 cars only
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.
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 volts. This parameter indicates the voltage measured by the transfer case shift control module at the transfer case shift control module battery feed.
Encoder Circuit A, B, C, P: The scan tool displays On or Off. If a high voltage is displayed 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 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 Status: The scan tool displays On or Off. This parameter indicates On when battery voltage is applied to Motor B circuit.
Motor B Low Side Driver Status: 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.
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.
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.
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 volts. This parameter indicates the voltage measured by the transfer case shift control module at the transfer case shift control module battery feed.
Encoder Circuit A, B, C, P: The scan tool displays On or Off. If a high voltage is displayed 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 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 Status: The scan tool displays On or Off. This parameter indicates On when battery voltage is applied to Motor B circuit.
Motor B Low Side Driver Status: 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.
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.
