Scan Tool Parameter  | Data List  | Units Displayed  | Typical Data Value  | 
|---|---|---|---|
Operating Conditions: Engine is at idle, upper radiator hose is hot, closed throttle, gear is in Park or Neutral, and accessories are OFF.  | |||
2WD High Indicator Light  | Transfer Case Data  | On/Off  | On  | 
4WD High Indicator Light  | Transfer Case Data  | On/Off  | Off  | 
4WD Low Indicator Light  | Transfer Case Data  | On/Off  | Off  | 
Accessory Status  | Transfer Case Data  | Not Active/Active  | Active  | 
ATC Motor Init. Test  | Transfer Case Data  | Not Initialized/Passed/Failed/In Progress  | Passed  | 
Auto 4WD Indicator Light  | Transfer Case Data  | On/Off  | On  | 
Battery Voltage  | Transfer Case Data  | Volts  | Battery Voltage  | 
Clutch Calibration Status  | Transfer Case Data  | Not Learned/Initial Learn/Normal Learn  | Normal Learn  | 
Clutch Coupling  | Transfer Case Data  | 0-100%  | Varies  | 
Front Axle Actuator  | Transfer Case Data  | Volts  | Battery Voltage  | 
Front Axle Actuator Status  | Transfer Case Data  | Engaged/Disengaged  | Disengaged  | 
Front Axle Switch  | Transfer Case Data  | Locked/Unlocked  | Unlocked  | 
Incremental Impulse Sensor  | Transfer Case Data  | PWM Voltage  | Varies  | 
Incremental Position Sensor Direction  | Transfer Case Data  | Clockwise/Counter Clockwise  | Varies  | 
Incremental Position Sensor  | Transfer Case Data  | Degrees  | Varies  | 
Incremental Position Sensor  | Transfer Case Data  | Volts  | Varies  | 
Mode Switch Return Voltage  | Transfer Case Data  | Volts  | Varies  | 
Mode Switch Selected  | Transfer Case Data  | Auto 4WD/2 High/4High/4 Low/Neutral  | 2 High  | 
Mode Switch Supply Voltage  | Transfer Case Data  | Volts  | 5 Volts  | 
Motor Brake  | Transfer Case Data  | Volts  | Battery Voltage  | 
Neutral Indicator Light  | Transfer Case Data  | On/Off  | Off  | 
Rotational Position Sensor  | Transfer Case Data  | Degrees  | Varies  | 
Rotational Position Sensor  | Transfer Case Data  | Volts  | Varies  | 
Run/Crank  | Transfer Case Data  | Active/Inactive  | Active  | 
Software Part Number  | Transfer Case Data  | GM Part Number  | Current Software Release  | 
Transfer Case Lock  | Transfer Case Data  | Engaged/Disengaged  | Disengaged  | 
Transfer Case Motor  | Transfer Case Data  | Amperage  | 0 Amps  | 
Transfer Case Position  | Transfer Case Data  | Current Transfer Case Mode or Range  | 2 High  | 
Trans. Fluid Temp  | Transfer Case Data  | Degrees C  | Varies  | 
TR Switch Status  | Transfer Case Data  | Current Transmission Gear  | Park  | 
Vehicle Speed  | Transfer Case Data  | km/h  | Varies  |