Steering operation is heavy, or power assist does not work

1. Steering operation is heavy, or power assist does not work diagnostics

1. Models with hydraulic power steering units

1) The oil pressure of the power steering oil pump is low.

Insufficient power steering oil pump pressure

  • Repair the power steering oil pump.

2) Insufficient power steering fluid

Insufficient power steering fluid

  • Refill the fluid.

2. Models with electric power steering units

1) Overheat prevention control

  • Do not operate the steering wheel until the electric power steering unit temperature decreases.

2) Cut harness, disconnected connector, etc.

  • Replace the harness or inspect the connector.

3) EPS motor control unit malfunction

  • If a DTC is set, perform the repair accurately according to the specified DTC diagnosis.
  • If the symptom is not corrected, replace the electric power steering unit.

4) Torque sensor malfunction

  • If a DTC is set, perform the repair accurately according to the specified DTC diagnosis.
  • If the symptom is not corrected, replace the electric power steering unit.
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