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Does not Warm [10/2017 - ]: Procedure

  1. CHECK VEHICLE CONDITION 
    1. Check the problem symptoms.

      Result

      Result  Proceed to
      The rear seat RH warming function does not operate A
      The rear seat LH warming function does not operate B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (REAR BUCKLE SWITCH, OCCUPANT SENSOR, THERMISTOR2/3 DETECTION TEMPERATURE, SPOT HEATER SWITCH) 
    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 / Rear Right Seat / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Rear Right Seat > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Rear Buckle Switch Rear RH seat belt signal ON or OFF ON: Rear RH seat belt fastend
      OFF: Rear RH seat belt unfastend      		 -
      Occupant Sensor Occupant detection sensor signal ON or OFF ON: Rear RH seat occupied
      OFF: Rear RH seat not occupied      		 -
      Thermistor2 Detection Temperature Detected rear seatback heater thermistor temperature 0 to 65535 0 to 1023 -
      Thermistor3 Detection Temperature Detected rear seatback heater thermistor temperature 0 to 65535 0 to 1023 -
      Spot Heater Switch State Spot heater switch signal ON or OFF ON: Touch "Spot Heater"
      OFF: Not touch "Spot Heater"      		 -

      Body Electrical > Rear Right Seat > Data List 

      Tester Display
      Rear Buckle Switch
      Occupant Sensor
      Thermistor2 Detection Temperature
      Thermistor3 Detection Temperature
      Spot Heater Switch State

      Result

      Result  Proceed to
      OK A
      NG (Item: Thermistor2 Detection Temperature, Thermistor3 Detection Temperature) B
      NG (Item: Rear Buckle Switch) C
      NG (Item: Occupant Sensor) D
      NG (Item: Spot Heater Switch State) E

    Result: 

    A 

    REPLACE POSITION CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    C 

    See step  5

    Result: 

    D 

    See step  7

    Result: 

    E 

    GO TO REAR MULTI OPERATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    B 

    See step  3

  3. INSPECT REAR SEAT INNER BELT ASSEMBLY RH 
    1. Remove the rear seat inner belt assembly RH.

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the rear seat inner belt assembly RH.

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY RH - POSITION CONTROL ECU ASSEMBLY RH) 
    1. Disconnect the R24 rear seat inner belt assembly RH connector.
    2. Disconnect the R7 position control ECU assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R24-10 - R7-3 (BCL1) Always Below 1 Ω
      R24-4 - Body ground Always Below 1 Ω
      R24-10 or R7-3 (BCL1) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. INSPECT REAR SEAT CUSHION PAD RH (OCCUPANT DETECTION SENSOR) 
    1. Remove the rear seat cushion pad RH (occupant detection sensor).

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the rear seat cushion pad RH (occupant detection sensor).

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SEAT CUSHION PAD RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (REAR SEAT CUSHION PAD RH - POSITION CONTROL ECU ASSEMBLY RH) 
    1. Disconnect the T4 rear seat cushion pad RH connector.
    2. Disconnect the R7 position control ECU assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T4-3 (ZJK) - R7-17 (ODS) Always Below 1 Ω
      T4-1 (QD2) - Body ground Always Below 1 Ω
      T4-3 (ZJK) or R7-17 (ODS) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. INSPECT SEPARATE TYPE REAR SEATBACK COVER RH 
    1. Remove the separate type rear seatback cover RH.

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the separate type rear seatback cover RH.

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SEPARATE TYPE REAR SEATBACK COVER RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - SEPARATE TYPE REAR SEATBACK COVER RH) 
    1. Disconnect the R6 and R7 position control ECU assembly RH connectors.
    2. Disconnect the R14 separate type rear seatback cover RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R7-7 (SGND) - R14-9 Always Below 1 Ω
      R6-6 (HTG1) - R14-1 Always Below 1 Ω
      R7-4 (NTC3) - R14-3 Always Below 1 Ω
      R7-23 (NTC2) - R14-4 Always Below 1 Ω
      R6-3 (HT1) - R14-7 Always Below 1 Ω
      R6-5 (HTG2) - R14-8 Always Below 1 Ω
      R6-2 (HT2) - R14-12 Always Below 1 Ω
      R6-6 (HTG1) or R14-1 - Other terminals and body ground Always 10 kΩ or higher
      R7-4 (NTC3) or R14-3 - Other terminals and body ground Always 10 kΩ or higher
      R7-23 (NTC2) or R14-4 - Other terminals and body ground Always 10 kΩ or higher
      R6-3 (HT1) or R14-7 - Other terminals and body ground Always 10 kΩ or higher
      R6-5 (HTG2) or R14-8 - Other terminals and body ground Always 10 kΩ or higher
      R6-2 (HT2) or R14-12 - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  9. READ VALUE USING TECHSTREAM (REAR BUCKLE SWITCH, OCCUPANT SENSOR, THERMISTOR2/3 DETECTION TEMPERATURE, SPOT HEATER SWITCH) 
    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 / Rear Left Seat / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Rear Left Seat > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Rear Buckle Switch Rear RH seat belt signal ON or OFF ON: Rear RH seat belt fastend
      OFF: Rear RH seat belt unfastend      		 -
      Occupant Sensor Occupant detection sensor signal ON or OFF ON: Rear RH seat occupied
      OFF: Rear RH seat not occupied      		 -
      Thermistor2 Detection Temperature Detected rear seatback heater thermistor temperature 0 to 65535 0 to 1023 -
      Thermistor3 Detection Temperature Detected rear seatback heater thermistor temperature 0 to 65535 0 to 1023 -
      Spot Heater Switch State Spot heater switch signal ON or OFF ON: Touch "Spot Heater"
      OFF: Not touch "Spot Heater"      		 -

      Body Electrical > Rear Left Seat > Data List 

      Tester Display
      Rear Buckle Switch
      Occupant Sensor
      Thermistor2 Detection Temperature
      Thermistor3 Detection Temperature
      Spot Heater Switch State

      Result

      Result  Proceed to
      OK A
      NG (Item: Thermistor2 Detection Temperature, Thermistor3 Detection Temperature) B
      NG (Item: Rear Buckle Switch) C
      NG (Item: Occupant Sensor) D
      NG (Item: Spot Heater Switch State) E

    Result: 

    A 

    REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    C 

    See step  12

    Result: 

    D 

    See step  14

    Result: 

    E 

    GO TO REAR MULTI OPERATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    B 

    See step  10

  10. INSPECT REAR NO. 1 SEAT INNER BELT ASSEMBLY LH 
    1. Remove the rear No. 1 seat inner belt assembly LH.

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the rear No. 1 seat inner belt assembly LH.

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR NO. 1 SET INNER BELT ASSEMBLY. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (REAR SEAT NO. 1 INNER BELT ASSEMBLY LH - POSITION CONTROL ECU ASSEMBLY LH) 
    1. Disconnect the R49 rear No. 1 seat inner belt assembly LH connector
    2. Disconnect the R41 position control ECU assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R49-10 - R41-3 (BCL1) Always Below 1 Ω
      R49-4 - Body ground Always Below 1 Ω
      R49-10 or R41-3 (BCL1) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. INSPECT REAR SEAT CUSHION PAD LH (OCCUPANT DETECTION SENSOR) 
    1. Remove the rear seat cushion pad LH (occupant detection sensor).

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the rear seat cushion pad LH (occupant detection sensor).

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SEAT CUSHION PAD LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (REAR SEAT CUSHION PAD LH - POSITION CONTROL ECU ASSEMBLY LH) 
    1. Disconnect the T11 rear seat cushion pad LH connector.
    2. Disconnect the R41 position control ECU assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T11-3 (ZJK) - R41-17 (ODS) Always Below 1 Ω
      T11-1 (QD2) - Body ground Always Below 1 Ω
      T11-3 (ZJK) or R41-17 (ODS) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  14. INSPECT SEPARATE TYPE REAR SEATBACK COVER LH 
    1. Remove the separate type rear seatback cover LH.

      Refer to REMOVAL [10/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Inspect the separate type rear seatback cover LH.

      Refer to INSPECTION [10/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SEPARATE TYPE REAR SEATBACK COVER RH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  15

  15. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - SEPARATE TYPE REAR SEATBACK COVER LH) 
    1. Disconnect the R40 and R41 position control ECU assembly LH connectors.
    2. Disconnect the R46 separate type rear seatback cover LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R41-7 (SGND) - R46-9 Always Below 1 Ω
      R40-6 (HTG1) - R46-1 Always Below 1 Ω
      R41-4 (NTC3) - R46-3 Always Below 1 Ω
      R41-23 (NTC2) - R46-4 Always Below 1 Ω
      R40-3 (HT1) - R46-7 Always Below 1 Ω
      R40-5 (HTG2) - R46-8 Always Below 1 Ω
      R40-2 (HT2) - R46-12 Always Below 1 Ω
      R40-6 (HTG1) or R46-1 - Other terminals and body ground Always 10 kΩ or higher
      R41-4 (NTC3) or R46-3 - Other terminals and body ground Always 10 kΩ or higher
      R41-23 (NTC2) or R46-4 - Other terminals and body ground Always 10 kΩ or higher
      R40-3 (HT1) or R46-7 - Other terminals and body ground Always 10 kΩ or higher
      R40-5 (HTG2) or R46-8 - Other terminals and body ground Always 10 kΩ or higher
      R40-2 (HT2) or R46-12 - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY LH. Refer to  REMOVAL [10/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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