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DTC B265C: Pelvis Support Sensor Circuit [09/2014 - ]: Procedure

  1. CHECK FOR DTC 
    1. Check the parts which the DTCs have been output from (Refer to DTC CHECK / CLEAR [09/2014 - ] ).
      RESULT

      Result Proceed to
      DTC output from "Driver Seat" A
      DTC output from "Passenger Seat" B

    Result: 

    B 

    See step  8

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM (PELVIS SUPPORT OPERATION) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Driver Seat / Active Test.
    6. Perform the Active Test according to the display on the Techstream.
      DRIVER SEAT

      Tester Display Test Part Control Range Diagnostic Note
      Pelvis Support Operation Pelvis support operation Front / OFF / Rear -

      OK

      Motor operates normally.

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  3

  3. CHECK POSITION CONTROL ECU ASSEMBLY (PELVIS MOTOR CIRCUIT) 
    1. Disconnect the pelvis motor connector.
      GTY535612Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      d28-2 (SPEL) - d28-3 (PELE) Pelvis switch on 4.8 to 5.1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Lumbar Support Adjuster Assembly LH [Pelvis Motor])

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  4

  4. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 
    1. Reconnect the pelvis motor connector.
      GTY530041Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      d28-2 (SPEL) - Body ground Pelvis switch on 4.5 to 4.8 V
      RESULT

      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG (for Sports Seat Type) C
      NG (for Luxury Seat Type) D
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Lumbar Support Adjuster Assembly LH [Pelvis Motor])

    Result: 

    A 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    B 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    C 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    D 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

  5. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT ADJUSTER ASSEMBLY LH) 
    1. Disconnect the d4 and d5 position control ECU assembly connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      d4-15 (SSPL) - d28-2 (SPEL) Always Below 1 Ω
      d5-20 (SGND) - d28-3 (PELE) Always Below 1 Ω
      d4-15 (SSPL) - Body ground Always 10 kΩ or higher
      d5-20 (SGND) - Body ground Always 10 kΩ or higher
      RESULT

      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG C

    Result: 

    A 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    B 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 
    1. Disconnect the d28 pelvis motor connector.
      GTY411279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check if the pelvis motor moves smoothly when the battery is connected to the pelvis motor connector terminals.

      OK

      Measurement Condition Operational Direction
      Battery positive (+) → 4 (PEL-)
      Battery negative (-) → 1 (PEL+)      		 Backward
      Battery positive (+) → 1 (PEL+)
      Battery negative (-) → 4 (PEL-)      		 Forward
      RESULT

      Result Proceed to
      OK A
      NG (for Sports Seat Type) B
      NG (for Luxury Seat Type) C
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Lumbar Support Adjuster Assembly LH [Pelvis Motor])

    Result: 

    B 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    C 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY LH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    A 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT ADJUSTER ASSEMBLY LH) 
    1. Disconnect the d3 position control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      d3-4 (PEL+) - d28-1 (PEL+) Always Below 1 Ω
      d3-2 (PEL-) - d28-4 (PEL-) Always Below 1 Ω
      d3-4 (PEL+) - Body ground Always 10 kΩ or higher
      d3-2 (PEL-) - Body ground Always 10 kΩ or higher
      RESULT

      Result Proceed to
      OK (for Sports Seat Type) A
      OK (for Luxury Seat Type) B
      NG C

    Result: 

    A 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    B 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. PERFORM ACTIVE TEST USING TECHSTREAM (PELVIS SUPPORT OPERATION) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Passenger Seat / Active Test.
    6. Perform the Active Test according to the display on the Techstream.
      PASSENGER SEAT

      Tester Display Test Part Control Range Diagnostic Note
      Pelvis Support Operation Pelvis support operation Front / OFF / Rear -

      OK

      Motor operates normally.

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  9

  9. CHECK POSITION CONTROL ECU ASSEMBLY (PELVIS MOTOR CIRCUIT) 
    1. Disconnect the pelvis motor connector.
      GTY531600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      c33-2 (SPEL) - c33-3 (PELG) Pelvis switch on 4.8 to 5.1 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Lumbar Support Adjuster Assembly RH [Pelvis Motor])

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  10

  10. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (PELVIS MOTOR) 
    1. Reconnect the pelvis motor connector.
      GTY526217Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      c33-2 (SPEL) - Body ground Pelvis switch on 4.5 to 4.8 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Lumbar Support Adjuster Assembly RH [Pelvis Motor])

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    NG 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

  11. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT ADJUSTER ASSEMBLY RH) 
    1. Disconnect the c2 and c3 position control ECU assembly connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      c3-15 (SSPL) - c33-2 (SPEL) Always Below 1 Ω
      c2-20 (SGND) - c33-3 (PELG) Always Below 1 Ω
      c3-15 (SSPL) - Body ground Always 10 kΩ or higher
      c2-20 (SGND) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  12. INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (PELVIS MOTOR) 
    1. Disconnect the c33 pelvis motor connector.
      GTY411279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check if the pelvis motor moves smoothly when the battery is connected to the pelvis motor connector terminals.

      OK

      Measurement Condition Operational Direction
      Battery positive (+) → 4 (PEL-)
      Battery negative (-) → 1 (PEL+)      		 Backward
      Battery positive (+) → 1 (PEL+)
      Battery negative (-) → 4 (PEL-)      		 Forward
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Lumbar Support Adjuster Assembly RH [Pelvis Motor])

    Result: 

    NG 

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY RH (PELVIS MOTOR) 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - LUMBAR SUPPORT ADJUSTER ASSEMBLY RH) 
    1. Disconnect the c4 position control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      c4-4 (PEL+) - c33-1 (PEL+) Always Below 1 Ω
      c4-2 (PEL-) - c33-4 (PEL-) Always Below 1 Ω
      c4-4 (PEL+) - Body ground Always 10 kΩ or higher
      c4-2 (PEL-) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE POSITION CONTROL ECU ASSEMBLY 

    (Refer to REMOVAL [09/2014 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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