EPS (LKAS) Control Unit When the trouble of the EPS control occurs during adaptive cruise control (ACC) system operation, it makes EPS (LKAS) indicator come on. When detecting LKAS control relation's malfunction, it doesn't do, and the lighting up of EPS (LKAS) indicator by the adaptive cruise control (ACC)/LKAS indicator and there is a caution and the LKAS control of EPS is canceled.
After LKAS cancellation, depending on the malfunction which detected usual EPS control by the doing, it continues and it stops assist.
When the EPS indicator come on during adaptive cruise control (ACC) system operation, check the DTC of EPS (LKAS), and when the adaptive cruise control (ACC)/LKAS indicator come on, check the adaptive cruise control (ACC) system DTC and it does a trouble diagnosis.