AIR SUSPENSION SYSTEM FAIL-SAFE CHART


  1. FAIL-SAFE FUNCTION


    1. When an air suspension system malfunction is detected under the normal control operation, the suspension control ECU will suspend the switch control of the height control operation.

      Air Suspension System
      DTC No. Malfunction Item Fail-safe Operation Fail-safe Deactivation Conditions

      C1711/11

      C1712/12

      C1713/13

      C1714/14

      		 Height control sensor circuit Height control is interrupted, and damping control is performed with the lower step limit of the front and rear absorber control actuator set to 9. Returns to normal condition.

      C1715/15

      C1716/16

      C1717/17

      		 Acceleration sensor circuit Damping control is performed with the lower step limit of the front and rear absorber control actuator set to 9. Returns to normal condition.

      C1731/31

      C1732/32

      C1733/33

      C1734/34

      		 Absorber control actuator circuit

      Interrupts damping control, after moving to the 9th step.

      (Except malfunction actuator)

      		 Returns to normal condition.

      C1741/41

      C1742/42

      C1743/43

      C1744/44

      		 Height control solenoid valve circuit Interrupts height control. Returns to normal condition.
      C1745/45 Exhaust solenoid valve circuit Interrupts height control. Returns to normal condition.
      C1751/51 Suspension control relay circuit Interrupts height control. Return to normal condition.

      C1752/52

      C1761/61

      		 Lock is powered continuously or powered excessively in height control compressor motor Interrupts height control. Returns to normal condition.
      C1762/62 Continuous electric current to exhaust solenoid valve Interrupts height control. Returns to normal condition.
      C1781/81 Suspension control ECU When there is an EEPROM malfunction, the vehicle height is fixed at the normal height and damping control is canceled after setting the step of the front and rear absorber control actuator to 9 (height control continues to operate when there is no EEPROM malfunction). Returns to normal condition.
      C1782/82 Power source voltage Interrupts height control and damping control. Returns to normal condition.
      C1783/83 Vehicle speed sensor circuit Control is canceled after setting the step of the front and rear absorber control actuator to 9. Returns to normal condition.
      C1784/84 Steering angle sensor Interrupts damping force of rolling control. Returns to normal condition.
      C1785/85 Steering control ECU Interrupts damping force of rolling control. Returns to normal condition.
      C1787/87 Yaw rate and acceleration sensor Interrupts damping force of rolling control. Returns to normal condition.
      C1789/89

      • CAN communication system

      • ECM

      • Suspension control ECU

      • AFS ECU

      		 The vehicle height is fixed at the normal height and damping control is canceled after setting the step of the front and rear absorber control actuator to 9. Returns to normal condition.

      U0100/71

      U0101/71

      U0124/71

      		 CAN communication system Continues height control and damping control. Returns to normal condition.

      U0122/71

      U0132/71

      		 CAN communication system Control is canceled after setting the step of the front and rear absorber control actuator to 9. Returns to normal condition.

      U0126/71

      U0130/71

      		 CAN communication system Interrupt damping force of rolling control. Returns to normal condition.