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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis >> Suspension >> Suspension Control Systems >> Suspension Control >> Active Height Control Suspension >> Diagnostic Trouble Code Chart
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Diagnostic Trouble Code Chart

HINT:

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the Chart below.

Active Height Control Suspension 

DIAGNOSTIC TROUBLE CODE CHART

DTC Code Detection Item Trouble Area
C1711  Front Height Control Sensor RH Circuit Malfunction
  • Harness or connector
  • Front height control sensor RH
  • Suspension control ECU
C1712  Front Height Control Sensor LH Circuit Malfunction
  • Harness or connector
  • Front height control sensor LH
  • Suspension control ECU
C1713  Rear Height Control Sensor RH Circuit Malfunction
  • Harness or connector
  • Rear height control sensor RH
  • Suspension control ECU
C1714  Rear Height Control Sensor LH Circuit Malfunction
  • Harness or connector
  • Rear height control sensor LH
  • Suspension control ECU
C1715  Front Acceleration Sensor RH Malfunction
  • Harness or connector
  • Front acceleration sensor RH
  • Suspension control ECU
C1716  Front Acceleration Sensor LH Malfunction
  • Harness or connector
  • Front acceleration sensor LH
  • Suspension control ECU
C1717  Rear Acceleration Sensor Malfunction Suspension control ECU (Houses rear acceleration sensor)
C1718  Pressure Sensor Circuit Malfunction
  • Harness or connector
  • Height control pump and motor (Pressure sensor)
  • Suspension control ECU
C1719  Oil Temperature Sensor Circuit Malfunction
  • Harness or connector
  • Height control pump and motor (Fluid temperature sensor)
  • Suspension control ECU
C1731  Front Damping Force Control Actuator RH Circuit Malfunction
  • Harness or connector
  • Front shock absorber control valve RH (Front damping force control actuator RH)
  • Suspension control ECU
C1732  Front Damping Force Control Actuator LH Circuit Malfunction
  • Harness or connector
  • Front shock absorber control valve LH (Front damping force control actuator LH)
  • Suspension control ECU
C1733  Rear Damping Force Control Actuator RH Circuit Malfunction
  • Harness or connector
  • Rear shock absorber control valve RH (Rear damping force control actuator RH)
  • Suspension control ECU
C1734  Rear Damping Force Control Actuator LH Circuit Malfunction
  • Harness or connector
  • Rear shock absorber control valve LH (Rear damping force control actuator LH)
  • Suspension control ECU
C1736  Front Suspension Control Valve RH Malfunction
  • Harness or connector
  • Front suspension control valve RH (Front spring rate switching valve RH)
  • Suspension control ECU
  • No. 1 height control valve
C1737  Front Suspension Control Valve LH Malfunction
  • Harness or connector
  • Front suspension control valve LH (Front spring rate switching valve LH)
  • Suspension control ECU
  • No. 1 height control valve
C1741  Front Height Control Solenoid Valve RH Circuit Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1742  Front Height Control Solenoid Valve LH Circuit Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1743  Rear Height Control Solenoid Valve RH Circuit Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1744  Rear Height Control Solenoid Valve LH Circuit Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1753  Accumulator Solenoid Valve Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1754  Front Gate Solenoid Valve Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1755  Rear Gate Solenoid Valve Malfunction
  • Harness or connector
  • No. 1 height control valve
  • Suspension control ECU
  • Each front suspension control valve (Each front spring rate switching valve)
C1756  Suspension Control Relay Malfunction
  • Harness or connector
  • Suspension control relay
  • Suspension control ECU
C1763  Abnormal Pump Motor Oil Pressure
  • Harness or connector
  • Suspension control relay
  • Height control pump and motor
  • Suspension control ECU
C1764  Abnormal Leveling Valve Oil Pressure
  • No. 1 height control valve (Each solenoid valve is stuck)
  • Clog in the fluid line
  • Suspension control ECU
C1765  Abnormal Accumulator Valve Oil Pressure
  • No. 1 height control valve (Each solenoid valve is stuck)
  • Clog in the fluid line
  • Suspension control ECU
C1766  Height Control Pump Motor Current
  • Fluid leakage
  • No. 1 height control valve
  • Suspension control relay
  • Height control pump and motor
  • Clog in the fluid line
  • Suspension control ECU
C1781 Suspension Control ECU Malfunction Suspension control ECU
C1782  Power Source Voltage Malfunction
  • Battery
  • Charging system
  • Harness or connector
  • AHC-B fuse
  • AHC-B No. 2 fuse
  • Suspension control ECU
C1783  Speed Signal Communication Error
  • Vehicle stability control system
  • Suspension control ECU
C1784  Steering Angle Sensor Communication Error
  • Vehicle stability control system
  • Suspension control ECU
C1785  Steering Control ECU Communication Error
  • Variable gear ratio steering system (VGRS system)
  • Suspension control ECU
C1787  Forward/Rearward/Sideways G Sensor Communication Error
  • Vehicle stability control system
  • Suspension control ECU
C1791  Absorber Control Switch Circuit (Test Mode DTC)
  • Harness or connector
  • Integration control and panel (Damping mode select switch)
  • Suspension control ECU
C1792  Height Control Switch Circuit (Test Mode DTC)
  • Harness or connector
  • Integration control and panel (Height control switch)
  • Suspension control ECU
C1794  Height Control OFF Switch Circuit (Test Mode DTC)
  • Harness or connector
  • Integration control and panel (Height control OFF switch)
  • Suspension control ECU
C1795  Access Mode Switch Circuit (Test Mode DTC)
  • Harness or connector
  • Combination switch (Easy access mode switch)
  • Suspension control ECU
C1796  Front Acceleration Sensor RH Malfunction (Test Mode DTC)
  • Harness or connector
  • Front acceleration sensor RH
  • Suspension control ECU
C1797  Front Acceleration Sensor LH Malfunction (Test Mode DTC)
  • Harness or connector
  • Front acceleration sensor LH
  • Suspension control ECU
C1798  Rear Acceleration Sensor Malfunction (Test Mode DTC) Suspension control ECU (Houses rear acceleration sensor)
U0100  Lost Communication with ECM / PCM "A"
  • CAN communication system
  • ECM
  • Suspension control ECU
U0101  Lost Communication with TCM
  • CAN communication system
  • ECM
  • Suspension control ECU
U0114  Lost Communication with 4WD Control ECU
  • CAN communication system
  • Four wheel drive control ECU
  • Suspension control ECU
U0122  Lost Communication with Vehicle Dynamics Control Module
  • CAN communication system
  • Skid control ECU
  • Suspension control ECU
U0124  Lost Communication with Lateral Acceleration Sensor Module
  • CAN communication system
  • Yaw rate sensor
  • Suspension control ECU
U0126  Lost Communication with Steering Angle Sensor Module
  • CAN communication system
  • Steering sensor
  • Suspension control ECU
U0130  Lost Communication with VGRS
  • CAN communication system
  • Steering control ECU
  • Suspension control ECU
U0140  Lost Communication with Main Body ECU
  • CAN communication system
  • Main body ECU
  • Suspension control ECU