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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 232 (Power Window Control System (Hybrid) - Diagnostic Codes & Symptom Tests) >> POWER WINDOW CONTROL SYSTEM (for HV Model) >> DTC B2312: Power Window Switch Malfunction [06/2018 - ] >> Procedure

DTC B2312: Power Window Switch Malfunction [06/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / (desired system) / Clear DTCs.
    5. Clear the DTCs.

      Body Electrical > Master Switch > Clear DTCs 

      Body Electrical > D-Door Motor > Clear DTCs 

      Body Electrical > P-Door Motor > Clear DTCs 

      Body Electrical > RL-Door Motor > Clear DTCs 

      Body Electrical > RR-Door Motor > Clear DTCs 

    6. Check for DTCs.

      Body Electrical > Master Switch > Trouble Codes 

      Body Electrical > D-Door Motor > Trouble Codes 

      Body Electrical > P-Door Motor > Trouble Codes 

      Body Electrical > RL-Door Motor > Trouble Codes 

      Body Electrical > RR-Door Motor > Trouble Codes 

      OK

      DTC B2312 is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (DTC WAS STORED DUE TO SWITCH BEING OPERATED FOR 20 SECONDS OR MORE) 

    Result: 

    NG 

    See step  2

  2. CHECK DTC OUTPUT 
    1. Check the parts from which this DTC has been output.

      Result

      Result Proceed to
      DTC output from multiplex network master switch assembly A
      DTC output from power window regulator motor assembly (for driver door) B
      DTC output from power window regulator motor assembly (for front passenger door) C
      DTC output from power window regulator motor assembly (for rear LH door) D
      DTC output from power window regulator motor assembly (for rear RH door) E

    Result: 

    A 

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    C 

    See step  6

    Result: 

    D 

    See step  9

    Result: 

    E 

    See step  12

    Result: 

    B 

    See step  3

  3. READ VALUE USING TECHSTREAM (D-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / D-Door Motor / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > D-Door Motor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      D Door P/W Up SW Driver door power window manual up switch signal OFF or ON OFF: Driver door power window manual up switch not being operated
      ON: Driver door power window manual up switch being operated      		 -
      D Door P/W Down SW Driver door power window manual down switch signal OFF or ON OFF: Driver door power window manual down switch not being operated
      ON: Driver door power window manual down switch being operated      		 -

      Body Electrical > D-Door Motor > Data List 

      Tester Display
      D Door P/W Up SW
      D Door P/W Down SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  4

  4. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    1. Disconnect the J27 power window regulator motor assembly (for driver door) connector.
      GTY820714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Power Window Regulator Motor Assembly (for Driver Door))
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      J27-10 (UP1) - Body ground Power switch on (IG) 11 to 14 V
      J27-7 (DWN1) - Body ground Power switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)) 
    1. Disconnect the J20 multiplex network master switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J20-20 (UP) or J27-10 (UP1) - Body ground Always 10 kΩ or higher
      J20-15 (DOWN) or J27-7 (DWN1) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. READ VALUE USING TECHSTREAM (P-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / P-Door Motor / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > P-Door Motor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      P Door P/W Auto SW Front passenger door power window auto switch signal OFF or ON OFF: Front passenger door power window auto up or auto down switch not being operated
      ON: Front passenger door power window auto up or auto down switch being operated      		 -
      P Door P/W Up SW Front passenger door power window manual up switch signal OFF or ON OFF: Front passenger door power window manual up switch not being operated
      ON: Front passenger door power window manual up switch being operated      		 -
      P Door P/W Down SW Front passenger door power window manual down switch signal OFF or ON OFF: Front passenger door power window manual down switch not being operated
      ON: Front passenger door power window manual down switch being operated      		 -

      Body Electrical > P-Door Motor > Data List 

      Tester Display
      P Door P/W Auto SW
      P Door P/W Up SW
      P Door P/W Down SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  7

  7. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY 
    1. Remove the power window regulator switch assembly.

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the power window regulator switch assembly.

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)) 
    1. Disconnect the J5 power window regulator motor assembly (for front passenger door) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J3-5 (UP) or J5-10 (UP1) - Body ground Always 10 kΩ or higher
      J3-4 (DOWN) or J5-7 (DWN1) - Body ground Always 10 kΩ or higher
      J3-8 (AUTO) or J5-4 (AUTO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. READ VALUE USING TECHSTREAM (RL-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / RL-Door Motor / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > RL-Door Motor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RL Door P/W Auto SW Rear LH door power window auto switch signal OFF or ON OFF: Rear LH door power window auto up or auto down switch not being operated
      ON: Rear LH door power window auto up or auto down switch being operated      		 -
      RL Door P/W Up SW Rear LH door power window manual up switch signal OFF or ON OFF: Rear LH door power window manual up switch not being operated
      ON: Rear LH door power window manual up switch being operated      		 -
      RL Door P/W Down SW Rear LH door power window manual down switch signal OFF or ON OFF: Rear LH door power window manual down switch not being operated
      ON: Rear LH door power window manual down switch being operated      		 -

      Body Electrical > RL-Door Motor > Data List 

      Tester Display
      RL Door P/W Auto SW
      RL Door P/W Up SW
      RL Door P/W Down SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  10

  10. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door) 
    1. Remove the rear power window regulator switch assembly (for LH door).

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the rear power window regulator switch assembly (for LH door).

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door). Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door) - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)) 
    1. Disconnect the L10 power window regulator motor assembly (for rear LH door) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L7-5 (UP) or L10-10 (UP1) - Body ground Always 10 kΩ or higher
      L7-4 (DOWN) or L10-7 (DWN1) - Body ground Always 10 kΩ or higher
      L7-8 (AUTO) or L10-4 (AUTO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. READ VALUE USING TECHSTREAM (RR-DOOR MOTOR) 
    1. Enter the following menus: Body Electrical / RR-Door Motor / Data List.
    2. Read the Data List according to the display on the Techstream.

      Body Electrical > RR-Door Motor > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RR Door P/W Auto SW Rear RH door power window auto switch signal OFF or ON OFF: Rear RH door power window auto up or auto down switch not being operated
      ON: Rear RH door power window auto up or auto down switch being operated      		 -
      RR Door P/W Up SW Rear RH door power window manual up switch signal OFF or ON OFF: Rear RH door power window manual up switch not being operated
      ON: Rear RH door power window manual up switch being operated      		 -
      RR Door P/W Down SW Rear RH door power window manual down switch signal OFF or ON OFF: Rear RH door power window manual down switch not being operated
      ON: Rear RH door power window manual down switch being operated      		 -

      Body Electrical > RR-Door Motor > Data List 

      Tester Display
      RR Door P/W Auto SW
      RR Door P/W Up SW
      RR Door P/W Down SW

      OK

      On the Techstream screen, ON or OFF is displayed accordingly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    See step  13

  13. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door) 
    1. Remove the rear power window regulator switch assembly (for RH door).

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the rear power window regulator switch assembly (for RH door).

      Refer to INSPECTION [06/2018 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door). Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door) - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)) 
    1. Disconnect the L4 power window regulator motor assembly (for rear RH door) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L1-5 (UP) or L4-10 (UP1) - Body ground Always 10 kΩ or higher
      L1-4 (DOWN) or L4-7 (DWN1) - Body ground Always 10 kΩ or higher
      L1-8 (AUTO) or L4-4 (AUTO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door). Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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