SEAT VIBRATION SYSTEM Does not Warm

DESCRIPTION

The rear power seat switch (rear multi operation panel) sends switch operation signals to the position control ECU assembly via LIN communication. The position control ECU assembly that receives the signals operates the refresh seat functions by controlling the seat check valve, lumbar support pump and rear seatback heater.

WIRING DIAGRAM

Figure 1. RH Seat:

B0069KPE05
B006G83E09
B006C9RE06

Figure 2. LH Seat:

B0069KPE04
B006G83E10
B006C9RE07

CAUTION / NOTICE / HINT

Note


  • The seat vibration system uses the LIN communication system. First, confirm that there are no malfunctions in the LIN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

  • Initializing the position control ECU assembly will clear the seat position memory.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Make sure to initialize the position control ECU assembly after replacing the seat assembly or any related parts (including removal and installation).

Click here

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

    B

    READ VALUE USING GTS (REAR BUCKLE SWITCH, OCCUPANT SENSOR, THERMISTOR2, 3 DETECTION TEMPERATURE, SPOT HEATER SWITCH) Click here

    A

  2. READ VALUE USING GTS (REAR BUCKLE SWITCH, OCCUPANT SENSOR, THERMISTOR2/3 DETECTION TEMPERATURE, , SPOT HEATER SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Right Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      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 fastened

      OFF: Rear RH seat belt unfastened

      		 -
      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

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    C

    INSPECT REAR SEAT CUSHION PAD RH (OCCUPANT DETECTION SENSOR) Click here

    D

    INSPECT SEPARATE TYPE REAR SEATBACK COVER RH Click here

    E

    GO TO REAR MULTI OPERATION SYSTEM Click here

    B

  3. INSPECT REAR SEAT INNER BELT ASSEMBLY RH


    1. Remove the rear seat inner belt assembly RH.

      Click here

    2. Inspect the rear seat inner belt assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    OK

  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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    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).

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT CUSHION PAD RH Click here

    OK

  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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT SEPARATE TYPE REAR SEATBACK COVER RH


    1. Remove the separate type rear seatback cover RH.

      Click here

    2. Inspect the separate type rear seatback cover RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE REAR SEATBACK COVER RH Click here

    OK

  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
      R7-6 (NTC1) - R14-5 Always Below 1 Ω
      R6-3 (HT1) - R14-7 Always Below 1 Ω
      R6-5 (HTG2) - R14-8 Always Below 1 Ω
      R7-22 (NTC4) - R14-10 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
      R7-6 (NTC1) or R14-5 - 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
      R7-22 (NTC4) or R14-10 - 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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. READ VALUE USING GTS (REAR BUCKLE SWITCH, OCCUPANT SENSOR, THERMISTOR2, 3 DETECTION TEMPERATURE, SPOT HEATER SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Left Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      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 fastened

      OFF: Rear RH seat belt unfastened

      		 -
      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

    A

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    C

    INSPECT REAR SEAT CUSHION PAD LH (OCCUPANT DETECTION SENSOR) Click here

    D

    INSPECT SEPARATE TYPE REAR SEATBACK COVER LH Click here

    E

    GO TO REAR MULTI OPERATION SYSTEM Click here

    B

  10. INSPECT REAR NO.1 SEAT INNER BELT ASSEMBLY LH


    1. Remove the rear seat inner belt assembly LH.

      Click here

    2. Inspect the rear seat inner belt assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY Click here

    OK

  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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    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).

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT CUSHION PAD LH Click here

    OK

  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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. INSPECT SEPARATE TYPE REAR SEATBACK COVER LH


    1. Remove the separate type rear seatback cover LH.

      Click here

    2. Inspect the separate type rear seatback cover LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE REAR SEATBACK COVER RH Click here

    OK

  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
      R41-6 (NTC1) - R46-5 Always Below 1 Ω
      R40-3 (HT1) - R46-7 Always Below 1 Ω
      R40-5 (HTG2) - R46-8 Always Below 1 Ω
      R41-22 (NTC4) - R46-10 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
      R41-6 (NTC1) or R46-5 - 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
      R41-22 (NTC4) or R46-10 - 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

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR