Transfer Case-Automatic Four-Wheel Drive (A4WD)

The automatic 4-wheel drive transfer case system consists of the following:
- automatic 4WD indicator light
- Brake Pedal Position (BPP) switch
- Torque On Demand (TOD) relay
- front output shaft speed sensor
- Generic Electronic Module (GEM)
- 4WD high indicator light
- 4WD low indicator light
- 4WD mode switch
- rear output shaft speed sensor
- shift position sensor
- Throttle Position Output (TPO) from the Powertrain Control Module (PCM)
- transmission range sensor