Power Steering Control System (With 4WAS) -- M37/M56

• [With 4WAS]
  • Precaution
    • Precautions
      • Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
        • Notes
        • Precautions When Using Power Tools (Air Or Electric) And Hammers
      • Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
        • Notes
        • Operation Procedure
      • Precautions for Removal and Installation of 4WAS Components
      • Precautions for Harness Repair
        • 4WAS Communication Line
  • System Description
    • Component Parts
      • EPS System
        • EPS SYSTEM : Component Parts Location
        • EPS SYSTEM : Component Description
        • EPS SYSTEM : 4WAS Main Control Unit
        • EPS SYSTEM : Power Steering Solenoid Valve
      • 4WAS System
        • 4WAS SYSTEM : Component Parts Location
        • 4WAS SYSTEM : Component Description
        • 4WAS SYSTEM : 4WAS Front Control Unit
        • 4WAS SYSTEM : 4WAS Main Control Unit
        • 4WAS SYSTEM : 4WAS Front Actuator
        • 4WAS SYSTEM : 4WAS Rear Actuator
    • System
      • EPS System
        • EPS SYSTEM : System Description
        • EPS SYSTEM : Fail-safe (4WAS Main Control Unit)
      • 4WAS System
        • 4WAS SYSTEM : Sectional View
        • 4WAS SYSTEM : System Description
        • 4WAS SYSTEM : Fail-safe (4WAS Front Control Unit)
        • 4WAS SYSTEM : Fail-safe (4WAS Main Control Unit)
        • 4WAS SYSTEM : Protection Function (4WAS Front Control Unit)
        • 4WAS SYSTEM : Protection Function (4WAS Main Control Unit)
    • Diagnosis System (4WAS Front Control Unit)
      • CONSULT-III Function [4WAS(FRONT)]
        • Application Items
        • Ecu Identification
        • Self Diagnostic Result
        • Freeze Frame Data (FFD)
        • Data Monitor
        • Can Diagnostic Support Monitor
        • Active Test Mode
    • Diagnosis System (4WAS Main Control Unit)
      • CONSULT-III Function [4WAS(MAIN)/RAS/HICAS]
        • Application Items
        • Ecu Identification
        • Self Diagnostic Result
        • Freeze Frame Data (FFD)
        • Data Monitor
        • Can Diagnostic Support Monitor
        • Active Test Mode
  • Ecu Diagnosis Information
    • 4WAS Front Control Unit
      • Reference Value
        • Values On The Diagnosis Tool
        • Terminal Layout
        • Physical Values
      • Fail-safe (4WAS Front Control Unit)
      • Protection Function (4WAS Front Control Unit)
      • DTC Inspection Priority Chart
      • DTC Index
    • 4WAS Main Control Unit
      • Reference Value
        • Values On The Diagnosis Tool
        • Terminal Layout
        • Physical Values
      • EPS System
        • EPS SYSTEM : Fail-safe (4WAS Main Control Unit)
      • 4WAS System
        • 4WAS SYSTEM : Fail-safe (4WAS Main Control Unit)
      • Protection Function (4WAS Main Control Unit)
      • DTC Inspection Priority Chart
      • DTC Index
  • Wiring Diagram
    • 4WAS System
      • Wiring Diagram
  • Basic Inspection
    • Diagnosis And Repair Work Flow
      • Work Flow
        • Detailed Flow
      • Diagnostic Work Sheet
        • Description
        • Interview sheet sample
    • Additional Service When Replacing 4WAS Front Control Unit
      • Description
      • Work Procedure
    • Additional Service When Replacing 4WAS Main Control Unit
      • Description
    • 4WAS Front Actuator Neutral Position Adjustment
      • Description
      • Work Procedure (Pattern 1)
      • Work Procedure (Pattern 2)
      • Work Procedure (Pattern 3)
      • Work Procedure (Pattern 4)
  • DTC/Circuit Diagnosis
    • DTC Index
    • DTC C1621, C1622: 4WAS Front Actuator
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection (4WAS Front Motor)
      • Special Repair Requirement
    • DTC C1627: 4WAS Front Actuator
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
    • DTC C1628: 4WAS Front Actuator
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1631, C1632: 4WAS Front Control Unit
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1633: 4WAS Front Control Unit
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1651: Ignition Power Supply
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1652: 4WAS Front Motor Power Supply
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1654: 4WAS Front Actuator Relay
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1655: 4WAS Front Driver
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1661: 4WAS Front Lock Solenoid Valve
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection (4WAS Front Lock Solenoid Valve)
      • Special Repair Requirement
    • DTC C1667: Lock Insertion
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1668: Lock Holder Gap Detect
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
    • DTC C1669: Incomplete Lock Release
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
    • DTC C1671: Actuator Adjustment Not Performed
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1672: Incomplete Actuator Adjustment
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • 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/Decel G Sensor)
      • Special Repair Requirement
    • DTC C1686: 4WAS Main Control Unit
      • 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 Eletric Unit (Control Unit)]
      • Component Inspection (Yaw Rate/Side/Decel G Sensor)
      • Special Repair Requirement
    • DTC U1010: 4WAS Communication Circuit
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1900, C1901, C1906, C1907, C1927, C1933: 4WAS Main Control Unit
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • 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
    • DTC C1905, C1908, C1922, C1925, C1928: 4WAS Main Control Unit
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1909: 4WAS Main Control Unit
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1911, C1912: 4WAS Rear Motor Power Supply
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection
      • Special Repair Requirement
    • DTC C1914: Rear Wheel Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection
      • Special Repair Requirement
    • DTC C1915, C1916: Rear Wheel Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection
      • Special Repair Requirement
    • DTC C1917, C1918: Rear Wheel Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Component Inspection
      • Special Repair Requirement
    • DTC C1919: Vehicle Speed Signal
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1920: Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1921: Engine Speed Signal
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1923: Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1924: Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1926, C1932: Steering Angle Sensor
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • DTC C1930: 4WAS Front Control Unit
      • 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/Decel G Sensor)
      • Special Repair Requirement
    • DTC U1000: Can Comm Circuit
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
    • DTC U1010: Control Unit (Can)
      • Description
      • DTC Logic
        • DTC Detection Logic
        • DTC Confirmation Procedure
      • Diagnosis Procedure
      • Special Repair Requirement
    • Power Supply And Ground Circuit
      • Description
      • Diagnosis Procedure (4WAS Front Control Unit)
      • Diagnosis Procedure (4WAS Main Control Unit)
      • Component Inspection
      • Special Repair Requirement
    • Power Steering Solenoid Valve
      • Diagnosis Procedure
      • Component Inspection
      • Special Repair Requirement
    • 4WAS Warning Lamp
      • Diagnosis Procedure
      • Special Repair Requirement
  • 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
  • Removal And Installation
    • 4WAS Front Control Unit
      • Removal and Installation
        • Removal
        • Installation
    • 4WAS Main Control Unit
      • Removal and Installation
        • Removal
        • Installation
    • 4WAS Front Actuator Assembly
      • Removal and Installation
    • 4WAS Rear Actuator Assembly
      • Exploded View
      • Removal and Installation
        • Removal
        • Installation