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Home >> Lexus >> 2019 >> IS 350 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Circuit Tests >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> DTC C1A74: Steering Vibrator System Malfunction [10/2016 - 09/2020] >> Description
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DTC C1A74: Steering Vibrator System Malfunction [10/2016 - 09/2020]: Description

If the forward recognition camera receives a steering vibration ECU malfunction signal, DTC C1A74 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A74 Steering Vibrator System Malfunction When all of the following conditions are met:
  • The vehicle speed is 5 km/h (4 mph) or more.
  • The lane departure alert system is on.
  • A malfunction signal from the steering vibration ECU is detected by the forward recognition camera for 5 seconds or more.
  • Forward recognition camera
  • Steering vibration ECU
  • Spiral cable sub-assembly
  • Wire harness or connector