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Home >> Toyota >> 2021 >> Camry LE, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System (Int) - Diagnostics (2 Of 2) & Circuit Tests (Except Hybrid) >> Lighting System >> Door Unlock Detection Switch Circuit [03/2017 - ] >> Procedure

Door Unlock Detection Switch Circuit [03/2017 - ]: Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Main Body / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FR Door Lock Pos Front door RH unlock detection switch signal LOCK or UNLOCK LOCK: Front door RH locked
      UNLOCK: Front door RH unlocked      		 -
      FL Door Lock Pos Front door LH unlock detection switch signal LOCK or UNLOCK LOCK: Front door LH locked
      UNLOCK: Front door LH unlocked      		 -
      RR-Door Lock Pos SW Rear door RH unlock detection switch signal OFF or ON OFF: Rear door RH locked
      ON: Rear door RH unlocked      		 -
      RL-Door Lock Pos SW Rear door LH unlock detection switch signal OFF or ON OFF: Rear door LH locked
      ON: Rear door LH unlocked      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      FR Door Lock Pos
      FL Door Lock Pos
      RR-Door Lock Pos SW
      RL-Door Lock Pos SW

      OK

      Normal conditions listed above are displayed.

      Result

      Result Proceed to
      OK A
      "FL Door Lock Pos" is not normal B
      "FR Door Lock Pos" is not normal C
      "RL-Door Lock Pos SW" is not normal D
      "RR-Door Lock Pos SW" is not normal E

    Result: 

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [03/2017 - 06/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [06/2017 - 09/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [09/2019 - 08/2021]  , or refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ] 

    Result: 

    C 

    See step  5

    Result: 

    D 

    See step  8

    Result: 

    E 

    See step  11

    Result: 

    B 

    See step  2

  2. INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH 
    1. Remove the front door lock with motor assembly LH.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 09/2019] , or refer to REMOVAL [09/2019 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Inspect the front door lock with motor assembly LH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) 
    1. Disconnect the 3B instrument panel junction block assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O15-8 (LSSR) - 3B-13 Always Below 1 Ω
      O15-8 (LSSR) or 3B-13 - Body ground Always 10 kΩ or higher
      O15-7 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY755136Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Instrument Panel Junction Block Assembly)    		 - -
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3B-13 - MB-19 (LSFL) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

  5. INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH 
    1. Remove the front door lock with motor assembly RH.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 09/2019] , or refer to REMOVAL [09/2019 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Inspect the front door lock with motor assembly RH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 09/2019]  , or refer to  REMOVAL [09/2019 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) 
    1. Disconnect the 3B instrument panel junction block assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N15-7 (LSSR) - 3B-12 Always Below 1 Ω
      N15-7 (LSSR) or 3B-12 - Body ground Always 10 kΩ or higher
      N15-8 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY755137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Instrument Panel Junction Block Assembly)    		 - -
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3B-12 - MB-17 (LSFR) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

  8. INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY LH 
    1. Remove the rear door lock with motor assembly LH.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Inspect the rear door lock with motor assembly LH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY LH. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK WITH MOTOR ASSEMBLY LH - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY GROUND) 
    1. Disconnect the 3B instrument panel junction block assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Q5-6 (LSSR) - 3B-14 Always Below 1 Ω
      Q5-6 (LSSR) or 3B-14 - Body ground Always 10 kΩ or higher
      Q5-9 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY755135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Instrument Panel Junction Block Assembly)    		 - -
    1. Remove the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3B-14 - MB-5 (LSWL) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

  11. INSPECT REAR DOOR LOCK WITH MOTOR ASSEMBLY RH 
    1. Remove the rear door lock with motor assembly RH.

      Refer to REMOVAL [03/2017 - 06/2017] , or refer to REMOVAL [06/2017 - 10/2020] , or refer to REMOVAL [10/2020 - ]

    2. Inspect the rear door lock with motor assembly RH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR DOOR LOCK WITH MOTOR ASSEMBLY RH. Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK WITH MOTOR ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) 
    1. Disconnect the K51 main body ECU (multiplex network body ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P5-6 (LSSR) - K51-20 (LSWR) Always Below 1 Ω
      P5-6 (LSSR) or K51-20 (LSWR) - Body ground Always 10 kΩ or higher
      P5-9 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [03/2017 - 06/2017]  , or refer to  REMOVAL [06/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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