Steering Control System (With 4WAS) (Coupe)

• Basic Inspection
  • Diagnosis And Repair Workflow
    • Work Flow
      • Detailed Flow
  • Inspection And Adjustment
    • Additional Service When Replacing Control Unit
      • ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: Description
    • 4WAS Front Actuator Neutral Position Adjustment
      • 4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Description
      • 4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 1)
      • 4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 2)
      • 4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 3)
      • 4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 4)
• System Description
  • 4WAS System
    • System Diagram
      • Control Diagram
      • Cross-Sectional View
    • System Description
      • Description
      • Operation Description
      • Operation Feature
        • 4WAS Front Actuator
        • 4WAS Rear Actuator
        • Component Parts Location
    • Component Description
  • EPS System
    • System Diagram
    • System Description
      • Description
      • Operation Principle
    • Component Parts Location
    • Component Description
  • Diagnosis System (4WAS Front Control Unit)
    • CONSULT Function [4WAS(FRONT)]
      • Function
      • Self-Diag Result Mode
        • Display Item List
      • Data Monitor Mode
        • Display Item List
      • Can Diagnostic Support Monitor
        • Description
      • Active Test Mode
        • Description
  • Diagnosis System (4WAS Main Control Unit)
    • CONSULT Function [4WAS(MAIN)/RAS/HICAS]
      • Function
      • Self-Diag Result Mode
        • Display Item List
      • Data Monitor Mode
        • Display Item List
      • Can Diagnostic Support Monitor
        • Description
      • Active Test Mode
        • Description
• DTC/Circuit Diagnosis
  • DTC Index
  • DTC C1621, C1622: 4WAS Front Actuator
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection (4WAS Front Motor)
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1627: 4WAS Front Actuator
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
      • After Replacing 4WAS Front Control Unit
  • DTC C1628: 4WAS Front Actuator
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection (Front Wheel Steering Angle Sensor)
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
      • After Replacing 4WAS Front Control Unit
  • DTC C1631, C1632: 4WAS Front Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1633: 4WAS Front Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1651: Ignition Power Supply
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1652: 4WAS Front Motor Power Supply
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1654: 4WAS Front Actuator Relay
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1655: 4WAS Front Driver
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1661: 4WAS Front Lock Solenoid Valve
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection (4WAS Front Lock Solenoid Valve)
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1667: Lock Insertion
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
  • DTC C1668: Lock Holder Gap Detect
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
  • DTC C1669: Incomplete Lock Release
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • After Replacing 4WAS Front Actuator
  • DTC C1671: Actuator Adjustment Not Performed
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1672: Incomplete Actuator Adjustment
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1684, C1685: 4WAS Main Control Unit Communication
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection [ABS Actuator and Electric Unit (Control Unit)]
    • Component Inspection (Yaw Rate/Side G Sensor)
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • Before Replacing 4WAS Main Actuator
      • After Replacing 4WAS Front Control Unit
  • DTC C1686: 4WAS Main Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
  • DTC U1000, U1002: 4WAS Communication Circuit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection [ABS Actuator and Electric Unit (Control Unit)]
    • Component Inspection (Yaw Rate/Side G Sensor)
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC U1010: 4WAS Communication Circuit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC C1900, C1901, C1906, C1907, C1927, C1933: 4WAS Main Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1902, C1903, C1904, C1910, C1913: 4WAS Rear Motor Output
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection (4WAS Rear Motor)
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1905, C1908, C1922, C1925, C1928: 4WAS Main Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1909: 4WAS Main Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1911, C1912: 4WAS Rear Motor Power Supply
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection (4WAS Rear Motor Relay)
    • Component Inspection (Noise Suppressor)
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1914: Rear Wheel Steering Angle Sensor
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1915, C1916: Rear Wheel Steering Angle Sensor
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1917, C1918: Rear Wheel Steering Angle Sensor
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1919: Vehicle Speed Signal
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1920: Steering Angle Sen
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
      • After Replacing Steering Angle Sensor
  • DTC C1921: Engine Speed Signal
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1923: Steering Angle Sen
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC C1924: Steering Angle Sen
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
      • After Replacing Steering Angle Sensor
  • DTC C1926, C1932: Steering Angle Sensor
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
      • After Replacing Steering Angle Sensor
  • DTC C1930: 4WAS Front Control Unit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
  • DTC C1931: 4WAS Front Control Unit Communication
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Component Inspection [ABS Actuator and Electric Unit (Control Unit)]
    • Component Inspection (Yaw Rate/Side G Sensor)
    • Special Repair Requirement
      • Before Replacing 4WAS Front Control Unit
      • Before Replacing 4WAS Main Control Unit
      • After Replacing 4WAS Front Control Unit
  • DTC U1000: Can Comm Circuit
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • DTC U1010: Control Unit (Can)
    • Description
    • DTC Logic
      • DTC Detection Logic
      • DTC Confirmation Procedure
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
  • Power Supply And Ground Circuit
    • Description
    • Diagnosis Procedure (4WAS Front Control Unit)
    • Diagnosis Procedure (4WAS Main Control Unit)
    • Component Inspection (4WAS Rear Motor Relay)
    • Component Inspection (Noise Suppressor)
  • Power Steering Solenoid Valve
    • Description
    • Diagnosis Procedure
    • Component Inspection
  • 4WAS Warning Lamp
    • Description
    • Diagnosis Procedure
    • Special Repair Requirement
      • Before Replacing 4WAS Main Control Unit
• Ecu Diagnosis Information
  • 4WAS Front Control Unit
    • Reference Value
      • Values On The Diagnosis Tool
      • Terminal Layout
      • Physical Values
    • Wiring Diagram - 4WAS SYSTEM -
    • Fail Safe
      • 4WAS system (front)
    • DTC Inspection Priority Chart
    • DTC Index
  • 4WAS Main Control Unit
    • Reference Value
      • Values On The Diagnosis Tool
      • Terminal Layout
      • Physical Values
    • Wiring Diagram - 4WAS SYSTEM -
    • Fail Safe
      • 4WAS system (Main)
    • DTC Inspection Priority Chart
    • DTC Index
• Symptom Diagnosis
  • 4WAS Warning Lamp Does Not Turn On
    • Description
    • Diagnosis Procedure
  • 4WAS Warning Lamp Does Not Turn Off
    • Description
    • Diagnosis Procedure
  • Steering Wheel Miss Alignment
    • Description
    • Diagnosis Procedure
  • Steering System Vibration And Noise
    • Description
    • Diagnosis Procedure
  • Unbalance Steering Wheel Turning Force (Torque Variation)
    • Description
    • Diagnosis Procedure
• Precaution
  • Precautions
    • Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
    • Precaution for Battery Service
    • Precautions for Removal and Installation of 4WAS Components
    • Precautions for Harness Repair
      • 4WAS Communication Line
• Removal And Installation
  • 4WAS Front Control Unit
    • Exploded View
    • Removal and Installation
      • Removal
        • Notes
        • Installation
  • 4WAS Main Control Unit
    • Exploded View
    • Removal and Installation
      • Removal
      • Installation
  • 4WAS Front Actuator Assembly
    • Removal and Installation
  • 4WAS Rear Actuator Assembly
    • Exploded View
    • Removal and Installation
      • Removal
      • Installation