Adaptive Variable Suspension System (Diagnostics - Introduction): Other Lexus GS IV

PRECAUTION [03/2012 - ]

1. ADAPTIVE VARIABLE SUSPENSION SYSTEM PRECAUTION NOTE: Performing work after replacing the absorber control ECU with a normally functioning one from another vehicle may result in DTCs being stored, or have a negative effect on other systems. When replacing the absorber control ECU, be sure to install a new one. After replacing the absorber control ECU, enter test mode to make sure that all the test mode DTCs can be cleared and to perform registration of vehicle identification information. Refer to «TEST MODE PROCEDURE [03/2012 - ]»(ref-600439-S13383850182014022400000) .

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FAIL-SAFE CHART [03/2012 - ]

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 9. 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. 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. U0101 U0293 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 CAN communication system Roll posture control is interrupted. Returns to normal condition.