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Fail-Safe Chart [04/2013 - 10/2016]

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2024 Lexus IS 500, 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 500, and 2023 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. FAIL-SAFE CHART 
    ADAPTIVE VARIABLE SUSPENSION SYSTEM

    DTC Chart Malfunction Item Fail-safe Operation Fail-safe Deactivation Conditions
    C1715
    C1716
    C1717    		 Acceleration sensor circuit Damping force control is performed with the lower step limit of the front and rear absorber control actuators set to 9th. Returns to normal condition.
    C1731
    C1732
    C1733
    C1734    		 Absorber control actuator circuit Interrupts damping force control after moving to the 9th step (except when the actuator is malfunctioning). Returns to normal condition.
    C1781 Absorber control ECU Interrupts damping force control after moving to the 9th step. Returns to normal condition.
    C1782 Power source voltage Interrupts damping force control. Returns to normal condition.
    C1783 Vehicle speed sensor circuit
    • When there is a problem with the front right wheel speed sensor, control is interrupted after moving to the 9th step.
    • When there is a problem with the speed sensor of a wheel other than the front right wheel, control is continued.
    		 Returns to normal condition.
    C1784 Steering sensor Roll posture control is interrupted. Returns to normal condition.
    C1785* Front steering control ECU Roll posture control is interrupted. Returns to normal condition.
    C1787 Yaw rate sensor Roll posture control is interrupted. Returns to normal condition.
    C1789 Vehicle identification malfunction Interrupts damping force control after moving to the 9th step. Returns to normal condition.
    U0100
    U0101    		 CAN communication system Continues damping force control. Returns to normal condition.
    U0122 CAN communication system Interrupts damping force control after moving to the 9th step. Returns to normal condition.
    U0124
    U0126
    U0130*    		 CAN communication system Roll posture control is interrupted. Returns to normal condition.

    *: w/ VGRS system

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