Circuit/System Description
The power steering control module monitors the temperature of the power steering system. The power steering control module uses voltage, current levels and input from an internal temperature sensor to calculate an estimated system temperature. If the power steering control module detects a high system temperature event is occurring, the amount of assist is decreased to reduce system temperature, in effort to prevent thermal damage to the power steering components.
The power steering control module contains the steering wheel angle sensor. The steering wheel angle sensor identifyies the position and direction of the steering wheel rotation. The steering wheel angle signal is sending a serial data to the GMLAN high speed bus.
The power steering control module continuously monitors the voltage and current levels being commanded to the 3-phase steering motor. The power steering control module compares the desired and actual current levels to detect malfunctions in the internal power steering motor circuits.
The power steering control module continuously monitors the digital torque sensor signal. As the steering wheel is turned and torsional twist is applied to the steering shaft, the steering input and output shafts are monitored via the torque signal circuit and then processed by the power steering control module to calculate the steering torque.