Component Description

Electronic Power Assist Steering (EPAS) System

Component Description

Steering Gear

The EPAS (Electronic Power Assist Steering) gear is an assembly that consists of a PSCM (Power Steering Control Module), a motor, a steering shaft torque sensor and EPAS (Electronic Power Assist Steering) gear isolators, all of which are serviced as an assembly. The inner and outer tie rods and the gear bellows boots are available for service.

- The steering shaft torque sensor is mounted near the input shaft of the EPAS (Electronic Power Assist Steering) gear and is used by the PSCM (Power Steering Control Module) to determine how much force the steering wheel is being turned by.

- The EPAS (Electronic Power Assist Steering) gear has one inner tie rod located at each end of the gear assembly and is available separately for service.

- The EPAS (Electronic Power Assist Steering) gear has one outer tie rod located at each end of the gear assembly and is available separately for service.

- The EPAS (Electronic Power Assist Steering) gear has one bellows boot located at each side of the EPAS (Electronic Power Assist Steering) gear assembly. Each boot is held in place with 2 boot clamps. The boots and clamps are available for service.

- The EPAS (Electronic Power Assist Steering) gear has isolators located at each attachment point of the gear. These isolators aid in the reduction of NVH (Noise, Vibration, or Harshness) concerns and are not available separately for service.

Power Steering Control Module (PSCM)

The PSCM (Power Steering Control Module) is the ECU (Electronic Control Unit) for the EPAS (Electronic Power Assist Steering) system. The module monitors all sensor inputs and HS-CAN (High Speed Controller Area Network) messages that relate to the EPAS (Electronic Power Assist Steering) system and directly controls the output of the EPAS (Electronic Power Assist Steering) motor. If a new PSCM (Power Steering Control Module) is installed, the module must be programmed with the correct vehicle information. REFER to Programmable Module Installation (PMI) .