Failure Modes

When a DTC is present in the PSCM, the EPAS system enters 1 of 2 modes of operation.

The EPAS system enters a reduced steering assist  mode to protect the internal components of the EPAS system when a concern is detected by the PSCM such as over-temperature concerns or low and high battery voltage and other items not considered to be a critical safety concern. This reduced steering assist mode gives the steering a heavier than normal feel.

The EPAS system enters a manual steering  mode (no electrical steering assistance is provided) when a concern considered to be a critical safety concern is detected. In manual steering mode, the vehicle has mechanical steering operation only, which gives steering operation a heavy feel.