Engine is at idle, upper radiator hose is hot, gear is in Park or Neutral, and accessories are OFF.

ATC Application

Transfer Case Data

Number

Number

AWD Indicator

Transfer Case Data

On/Off

On

Battery Voltage

Transfer Case Data

Volts

Varies

Encoder Channel A

Transfer Case Data

On/Off

On

Encoder Channel B

Transfer Case Data

On/Off

On

Encoder Channel C

Transfer Case Data

On/Off

On

Encoder Channel P

Transfer Case Data

On/Off

On

Encoder Gear Position

Transfer Case Data

4WD High/4WD Low/Auto 4WD

4WD High

Encoder Supply Voltage

Transfer Case Data

Volts

Battery Voltage

GM Part Number

Transfer Case Data

Part Number

Part Number

Ign Cycles Since Last Current DTC

Transfer Case Data

Count

Varies

Mode Switch Return Voltage

Transfer Case Data

Volts

0-5 V

Mode Switch Selected

Transfer Case Data

Transfer Case Mode

AWD/Inactive

Motor A High Side Driver

Transfer Case Data

On/Off

Off

Motor A Low Side Driver

Transfer Case Data

On/Off

Off

Motor B High Side Driver

Transfer Case Data

On/Off

Off

Motor B Low Side Driver

Transfer Case Data

On/Off

Off

Neutral Indicator Light

Transfer Case Data

On/Off

Off

Service 4WD Indicator

Transfer Case Data

On/Off

Off

TCS Request

Transfer Case Data

On/Off

Off

4WD Low Active

Transfer Case Data

Yes/No

No

4WD Low Indicator Light

Transfer Case Data

On/Off

Off