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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Power Back Door System - Diagnostic Codes & Symptom Tests >> Power Back Door System >> Power Back Door cannot be Operated Using Any Switch [11/2023 - ] >> Procedure

Power Back Door cannot be Operated Using Any Switch [11/2023 - ]: Procedure

  1. CHECK VEHICLE CONDITION 
    1. Operate the multi-information display in the combination meter assembly and check the customization status.
      Display Description Default Setting Relevant ECU
      System Settings Function that enables/disables the power back door. ON ON or OFF Multiplex network door ECU

      Result

      Result Proceed to
      Customization item is "ON" (power back door system operation is possible) A
      Customization item is "OFF" (power back door system operation is prohibited) B

    Result: 

    B 

    PERFORM CUSTOMIZE SETTING 

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

    Result: 

    A 

    See step  2

  2. CHECK CUSTOMIZE SETTING (UNLOCK KEY TWICE FUNCTION) 
    1. Read the customize setting "Unlock Key Twice Function" according to the display on the GTS.

      Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

      Result

      Result Proceed to
      The customize setting is "Disable" A
      The customize setting is "Enable" B

    Result: 

    B 

    PERFORM CUSTOMIZE SETTING 

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

    Result: 

    A 

    See step  3

  3. CHECK CUSTOMIZE SETTING (WIRELESS UNLOCK TWICE FUNCTION) 
    1. Read the customize setting "Wireless Unlock Twice Function" according to the display on the GTS.

      Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

      Result

      Result Proceed to
      The customize setting is "Disable" A
      The customize setting is "Enable" B

    Result: 

    B 

    PERFORM CUSTOMIZE SETTING 

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

    Result: 

    A 

    See step  4

  4. CHECK CUSTOMIZE SETTING (ENTRY UNLOCK TWICE FUNCTION) 
    1. Read the customize setting "Entry Unlock Twice Function" according to the display on the GTS.

      Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

      Result

      Result Proceed to
      The customize setting is "Disable" A
      The customize setting is "Enable" B

    Result: 

    B 

    PERFORM CUSTOMIZE SETTING 

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ]

    Result: 

    A 

    See step  5

  5. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Back Door > Trouble Codes 

      OK

      DTC is not output

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO DIAGNOSTIC TROUBLE CODE CHART 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ]

    Result: 

    OK 

    See step  6

  6. READ VALUE USING GTS 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Back Door > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Half Latch Switch Latch switch signal ON or OFF Back door opened condition: ON
      Back door closed condition: OFF      		 -
      Closer Position Switch Initial switch signal ON or OFF Back door opened condition: ON
      Back door closed condition: ON      		 -
      Pawl Switch Pawl switch signal ON or OFF Back door opened condition: OFF
      Back door closed condition: OFF      		 -
      Courtesy Switch Back door courtesy switch signal ON or OFF Back door opened condition: ON
      Back door closed condition: OFF      		 -

      Body Electrical > Back Door > Data List 

      Tester Display
      Half Latch Switch
      Closer Position Switch
      Pawl Switch
      Courtesy Switch

      Result

      Result Proceed to
      The ON/OFF switches normally depending on the back door condition (open or close). A
      The ON/OFF not switches normally depending on the back door condition (open or close). B

    Result: 

    B 

    See step  18

    Result: 

    A 

    See step  7

  7. CHECK POWER BACK DOOR SYSTEM CONDITION 
    1. Check the power back door system condition.

      Result

      Result Proceed to
      Power back door does not operate normally A
      Power back door operates normally B

    Result: 

    B 

    GO TO POWER BACK DOOR CANNOT BE OPERATED FREQUENTLY 

    Refer to Power Back Door cannot be Operated Frequently [11/2023 - ] 

    Result: 

    A 

    See step  8

  8. CHECK COMBINATION METER FUNCTION 
    1. Operation check
      1. Check that the shift position indicator light in the combination meter assembly operates correctly in accordance with the operation of the shift lever.
      2. Confirm that the speedometer indicates 0 km/h when the vehicle is stopped.

        OK

        The meter and gauge system operates correctly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO METER / GAUGE SYSTEM 

    for 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]

    except 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - AUXILIARY BATTERY AND BODY GROUND) 
    1. Disconnect the W30, W28 and W27 multiplex network door ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W28-4 (GND) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      W30-7 (ECUB) - Body ground Ignition switch off 11 to 14 V*1
      10.5 to 16 V*2
      W27-5 (B) - Body ground Ignition switch off 11 to 14 V*1
      10.5 to 16 V*2
      W30-9 (IG) - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      1. *1: w/o Stop and Start System
      2. *2: w/ Stop and Start System

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. READ VALUE USING GTS 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Back Door > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      PBD Main Switch Power back door ON/OFF signal ON or OFF Current customize setting displayed -
      Door Lock Signal Back door condition signal Lock or Unlock Lock: Back door locked
      Unlock: Back door unlocked      		 -

      Body Electrical > Back Door > Data List 

      Tester Display
      PBD Main Switch
      Door Lock Signal

      Result

      Result Proceed to
      Either item is normal A
      "PBD Main SW" item does not switch to "ON" or "OFF" according to customize setting B
      "Door Lock Signal" item does not switch to "Lock" or "Unlock" according to operation to lock or unlock all doors C

    Result: 

    B 

    GO TO METER / GAUGE SYSTEM 

    for 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]

    except 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

    Result: 

    C 

    See step  16

    Result: 

    A 

    See step  11

  11. READ VALUE USING GTS 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Back Door > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      PBD Touch Sensor RH Power back door sensor assembly RH signal ON, OFF or Open ON: Power back door sensor assembly RH pressed
      OFF: Power back door sensor assembly RH not pressed
      Open: Power back door sensor assembly RH circuit open      		 -
      PBD Touch Sensor LH Power back door sensor assembly LH signal ON, OFF or Open ON: Power back door sensor assembly LH pressed
      OFF: Power back door sensor assembly LH not pressed
      Open: Power back door sensor assembly LH circuit open      		 -

      Body Electrical > Back Door > Data List 

      Tester Display
      PBD Touch Sensor RH
      PBD Touch Sensor LH

      Result

      Result Proceed to
      On the GTS screen, ON or OFF is displayed accordingly A
      On the GTS screen, ON or OFF is not displayed accordingly or Open is displayed for power back door sensor assembly RH B
      On the GTS screen, ON or OFF is not displayed accordingly or Open is displayed for power back door sensor assembly LH C

    Result: 

    A 

    REPLACE MULTIPLEX NETWORK DOOR ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    C 

    See step  14

    Result: 

    B 

    See step  12

  12. INSPECT POWER BACK DOOR SENSOR ASSEMBLY RH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE POWER BACK DOOR SENSOR ASSEMBLY RH 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR SENSOR ASSEMBLY RH - MULTIPLEX NETWORK DOOR ECU) 
    1. Disconnect the W9 power back door sensor assembly RH connector.
    2. Disconnect the W29 multiplex network door ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W9-1 (OSR) - W29-8 (OSR) Always Below 1 Ω
      W9-2 (OSRE) - W29-9 (OSE) Always Below 1 Ω
      W9-1 (OSR) or W29-8 (OSR) - Body ground Always 10 kΩ or higher
      W9-2 (OSRE) or W29-9 (OSE) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX NETWORK DOOR ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. INSPECT POWER BACK DOOR SENSOR ASSEMBLY LH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE POWER BACK DOOR SENSOR ASSEMBLY LH 

    Refer to REMOVAL [12/2019 - ]

    Result: 

    OK 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR SENSOR ASSEMBLY LH - MULTIPLEX NETWORK DOOR ECU) 
    1. Disconnect the W10 power back door sensor assembly LH connector.
    2. Disconnect the W29 multiplex network door ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W10-1 (OSL) - W29-1 (OSL) Always Below 1 Ω
      W10-2 (OSLE) - W29-9 (OSE) Always Below 1 Ω
      W10-1 (OSL) or W29-1 (OSL) - Body ground Always 10 kΩ or higher
      W10-2 (OSLE) or W29-9 (OSE) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX NETWORK DOOR ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  16. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - MULTIPLEX NETWORK DOOR ECU) 
    1. Disconnect the H135 main body ECU (multiplex network body ECU) connector.
    2. Disconnect the W30 multiplex network door ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H135-7 (LSBO) - W30-11 (LIB) Always Below 1 Ω
      H135-7 (LSBO) or W30-11 (LIB) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Remove the main body ECU (multiplex network body ECU) with the connector(s) still connected.
      GTY1179962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Main Body ECU (Multiplex Network Body ECU))
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H135-7 (LSBO) - Body ground Back door unlocked Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX NETWORK DOOR ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [11/2023 - ]

  18. INSPECT BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY 

    Refer to REMOVAL [12/2019 - ]

    Result: 

    OK 

    See step  19

  19. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY) 
    1. Disconnect the W28 multiplex network door ECU connector.
    2. Disconnect the W13 back door lock with courtesy light switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W28-2 (DC+) - W13-2 (M+) Always Below 1 Ω
      W28-6 (DC-) - W13-1 (M-) Always Below 1 Ω
      W28-2 (DC+) or W13-2 (M+) - Body ground Always 10 kΩ or higher
      W28-6 (DC-) or W13-1 (M-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MULTIPLEX NETWORK DOOR ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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