LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Power Window Control System >> Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

NOTE:
  • When the front power window regulator motor assembly (for front passenger side) connector or the multiplex network switch assembly (for front passenger side) connector is disconnected, the power window control system must be initialized (See CUSTOMIZE PARAMETERS  ).
  • Since the power window control system has functions that use multiplex communication (BEAN), first confirm that there is no malfunction in the multiplex communication system by inspecting the multiplex communication functions in accordance with the How to Proceed with Troubleshooting procedure (See HOW TO PROCEED WITH TROUBLESHOOTING  ). Then, conduct the following inspection procedure.
  1. CHECK POWER WINDOW CONTROL SYSTEM (for Front Passenger Side) 
    1. Turn the engine switch on (IG)
    2. Operate the multiplex network switch assembly (for front passenger side) for 2 seconds or more.
    3. Check the blinking pattern of the LED illumination Compare the blinking pattern with the illustration below

      HINT

      If there is a malfunction in the pulse sensor, manually operating the multiplex network master switch assembly or multiplex network switch assembly will cause the multiplex network master switch assembly or multiplex network switch assembly LED illumination to blink The LED illumination continues to blink for 45 seconds or until the engine switch is turned off After 45 seconds, the multiplex network master switch assembly or multiplex network switch assembly LED illumination remains on

      Fig 1: LED Blinking Pattern Chart
      G05755758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Result Proceed to
      Normal A
      Fully closed position is misaligned B
      Fully closed position is misaligned and pulse sensor circuit malfunctions
      Pulse sensor circuit malfunctions C

    A: REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY (for Front Passenger Side)  (See REMOVAL  )

    B: Go to step  4

    C: Go to next step 

  2. PERFORM INITIALIZATION (POWER WINDOW CONTROL SYSTEM (for Front Passenger Side)) 
    1. Initialize the power window control system (for front passenger side) (See CUSTOMIZE PARAMETERS  ).
  3. CHECK POWER WINDOW CONTROL SYSTEM (FRONT PASSENGER SIDE AUTO UP/DOWN FUNCTION) 
    1. Check that the front passenger side auto UP/DOWN function operates normally (See OPERATION CHECK  ).

      OK: Front passenger side auto UP/DOWN function operates normally. 

    NG: Go to step 4 

    OK: END (INITIALIZATION IS DEFECTIVE) 

  4. INSPECT MULTIPLEX NETWORK SWITCH ASSEMBLY (PULSE SENSOR POWER SOURCE (for Front Passenger Side)) 
    1. Turn the engine switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      STANDARD VOLTAGE

      Tester Connection Switch Condition Specified Condition
      L13-5 (VCC) - L13-8 (SGND) Front passenger side power window switch OFF Below 1 V
      L13-5 (VCC) - L13-8 (SGND) Front passenger side power window switch UP or DOWN 11 to 14 V
      3. Fig 2: Identifying Multiplex Network Switch Assembly (For Front Passenger Side) Connector
      G05755763Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY (for Front Passenger Side)  (See REMOVAL  )

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (SWITCH (for Front Passenger Side) - Regulator Motor) 
    1. Disconnect the front power window regulator motor assembly (for front passenger side) connector
    2. Disconnect the multiplex network assembly (for front passenger side) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      L13-3 (PLS1) - L4-5 (PLS) Always Below 1 Ω
      L13-4 (PLS2) - L4-3 (PLS2) Always Below 1 Ω
      L13-5 (VCC) - L4-4 (SSRB) Always Below 1 Ω
      L13-8 (SGND) - L4-6 (E) Always Below 1 Ω
      L13-3 (PLS1) - Body ground Always 10 kΩ or higher
      L13-4 (PLS2) - Body ground Always 10 kΩ or higher
      L13-5 (VCC) - Body ground Always 10 kΩ or higher
      L13-8 (SGND) - Body ground Always 10 kΩ or higher
      4. Fig 3: Identifying Multiplex Network Switch Assembly (For Front Passenger Side) Connector
      G05755764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) 
    1. Replace the front power window regulator motor assembly (for front passenger side) (See REMOVAL  )
  7. PERFORM INITIALIZATION (POWER WINDOW CONTROL SYSTEM (for Front Passenger Side)) 
    1. Initialize the power window control system (for front passenger side) (See CUSTOMIZE PARAMETERS  )
  8. CHECK POWER WINDOW CONTROL SYSTEM (FRONT PASSENGER SIDE AUTO UP/DOWN FUNCTION) 
    1. Check that the front passenger side auto UP/DOWN function operates normally (See OPERATION CHECK  ).

      OK: Front passenger side auto UP/DOWN function operates normally. 

    NG: REPLACE MULTIPLEX NETWORK SWITCH ASSEMBLY (for Front Passenger Side)  (See REMOVAL  )

    OK: END (POWER WINDOW REGULATOR MOTOR IS DEFECTIVE) 

scientia non olet · About LEMON Manuals