LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2021 >> IS 350 AWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System - Diagnostics - Introduction >> Power Window Control System >> Fail-Safe Chart [04/2013 - ] >> Fail-Safe Chart [04/2013 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fail-Safe Chart [04/2013 - ]

  1. PULSE FAILURE OR DISPLACEMENT OF NON-DETECTION RANGE TO THE OPENING DIRECTION 
    1. If the pulse sensor built into the power window regulator motor malfunctions, the power window control system enters fail-safe mode.
      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

      Power Window Operation Condition
      Engine switch on (IG) Engine switch off
      (Key-off operation permitted)
      Engine switch off
      (Key-off operation prohibited)
      Manual up (Driver door window) X X -
      Manual down (Driver door window) X -
      Auto up (Driver door window)
      (hold switch at auto up position)
      ◦* X -
      Auto up (Driver door window) X X -
      Auto down (Driver door window) X X -
      Manual up (Remote switch operation) X X -
      Manual down (Remote switch operation) X X -
      Auto up (Remote switch operation)
      (hold switch at auto up position)
      X X -
      Auto up (Remote switch operation) X X -
      Auto down (Remote switch operation) X X -
      Key-linked open and close - X X
      Wireless transmitter-linked open - X X
      POWER WINDOW REGULATOR SWITCH ASSEMBLY AND REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR LH AND RH DOORS)

      Power Window Operation Condition
      Engine switch on (IG) Engine switch off
      (Key-off operation permitted)
      Engine switch off
      (Key-off operation prohibited)
      Manual up X X -
      Manual down X -
      Auto up
      (hold switch at auto up position)
      ◦* X -
      Auto up X X -
      Auto down X X -
      Key-linked open and close - X X
      Wireless transmitter-linked open - X X

      HINT: 

      • ◦: Operates
      • X: Operation prohibited
      • *: Operates in manual mode without jam protection

      Fail-safe deactivation condition 

      1. When the pulse sensor is normal, to deactivate fail-safe mode, pull up the power window switch to the auto up position and hold it for at least 1 second to fully close the window from the fully open position. As a result, the auto up / down function will return.
  2. INITIAL FAILURE 
    1. During initialization of the power window regulator motor ECU, when the window position or initialization complete status cannot be properly read from the EEPROM, the power window control system prohibits operation as follows.
      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

      Power Window Operation Condition
      Engine switch on (IG) Engine switch off
      (Key-off operation permitted)
      Engine switch off
      (Key-off operation prohibited)
      Manual up (Driver door window) X X -
      Manual down (Driver door window) X -
      Auto up (Driver door window)
      (hold switch at auto up position)
      ◦* X -
      Auto up (Driver door window) X X -
      Auto down (Driver door window) X X -
      Manual up (Remote switch operation) X X -
      Manual down (Remote switch operation) X X -
      Auto up (Remote switch operation)
      (hold switch at auto up position)
      X X -
      Auto up (Remote switch operation) X X -
      Auto down (Remote switch operation) X X -
      Key-linked open and close - X X
      Wireless transmitter-linked open - X X
      POWER WINDOW REGULATOR SWITCH ASSEMBLY AND REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR LH AND RH DOORS)

      Power Window Operation Condition
      Engine switch on (IG) Engine switch off
      (Key-off operation permitted)
      Engine switch off
      (Key-off operation prohibited)
      Manual up X X -
      Manual down X -
      Auto up
      (hold switch at auto up position)
      ◦* X -
      Auto up X X -
      Auto down X X -
      Key-linked open and close - X X
      Wireless transmitter-linked open - X X

      HINT: 

      • ◦: Operates
      • X: Operation prohibited
      • *: Operates in manual mode without jam protection

      Fail-safe deactivation condition 

      1. Initialize the power window regulator motor assembly.

        Refer to INITIALIZATION [04/2013 - ] 

  3. LIN COMMUNICATION FAILURE 
    1. If the LIN communication line is malfunctioning (communication stop), the power window control system prohibits operation as follows.
      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

      Power Window Operation Condition
      Engine switch on (IG)
      Manual up ◦*
      Manual down
      Auto up (hold switch at auto up position) -
      Auto up -
      Auto down -
      POWER WINDOW REGULATOR SWITCH ASSEMBLY AND REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR LH AND RH DOORS)

      Power Window Operation Condition
      Engine switch on (IG)
      Manual up ◦*
      Manual down
      Auto up (hold switch at auto up position) ◦*
      Auto up ◦*
      Auto down

      HINT: 

      • ◦: Operates
      • X: Operation prohibited
      • *: Jam protection can operate.
      • Remote up and down function does not operate.

      Fail-safe deactivation condition 

      1. Check LIN communication system.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]

  4. PULSE FAILURE AND LIN COMMUNICATION FAILURE 
    1. If the LIN communication line is malfunctioning (communication stop) and the pulse sensor for the jam protection function is malfunctioning, the power window control system prohibits operation as follows.
      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

      Power Window Operation Condition
      Always
      Manual up X
      Manual down X
      Auto up (hold switch at auto up position) X
      Auto up X
      Auto down X
      POWER WINDOW REGULATOR SWITCH ASSEMBLY AND REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR LH AND RH DOORS)

      Power Window Operation Condition
      Always
      Manual up X
      Manual down X
      Auto up (hold switch at auto up position) X
      Auto up X
      Auto down X

      HINT: 

      • ◦: Operates
      • X: Operation prohibited
      • Driver door window: When the jam protection function does not operate due to the LIN communication failure, the manual up and auto up functions will not operate.
      • Remote switch operation: Not operative during the LIN communication failure
  5. DISPLACEMENT OF NON-DETECTION RANGE TO THE OPENING DIRECTION AND LIN COMMUNICATION FAILURE / INITIAL FAILURE AND LIN COMMUNICATION FAILURE 
    1. If the LIN communication line is malfunctioning (communication stop) and the window position or the learned value is abnormal, the power window control system prohibits operation as follows.
      MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

      Power Window Operation Condition
      Always
      Manual up ◦*
      Manual down
      Auto up (hold switch at auto up position) -
      Auto up -
      Auto down -
      POWER WINDOW REGULATOR SWITCH ASSEMBLY AND REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR LH AND RH DOORS)

      Power Window Operation Condition
      Always
      Manual up ◦*
      Manual down
      Auto up (hold switch at auto up position) ◦*
      Auto up X
      Auto down X

      HINT: 

      • ◦: Operates
      • X: Operation prohibited
      • Remote switch operation: Operation is not possible during the LIN communication failure.
      • *: Jam protection can operate and window reverses upon reaching the fully closed position.