SEAT HEATER SYSTEM Seat Heater for Front Right Seat does not Operate

DESCRIPTION

When the refreshing seat switch is operated, the air conditioning amplifier assembly receives the signal. The air conditioning amplifier assembly receives the signal and operates the front seat heater.

WIRING DIAGRAM

A011M8ZE09

CAUTION / NOTICE / HINT

Note


  • If the auxiliary battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is displayed on the multi-information display in the combination meter assembly, inspect the auxiliary battery, referring to On-vehicle Inspection for the charging system.

    Click here

  • If the auxiliary battery voltage is low, the seat heater system may not operate. When "Operation of Electrical Items Restricted." is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".

    Click here

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

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Air Conditioner > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes
      OK
      DTC B14B5, B14C0 or B14C1 is not output.
      Result
      Result Proceed to
      OK (for Standard Seat Type) A
      OK (for Sports Seat Type) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - FRONT SEAT CUSHION PAD WITH COVER RH - BODY GROUND) Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  3. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT RIGHT SEAT) - BODY GROUND)


    1. A011OABC10
      *a

      Front view of wire harness connector

      (to Separate Type Front Seat Cushion Cover (Front Right Seat))

      Disconnect the a9 separate type front seat cushion cover (front right seat) connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      a9-2 (B1R) - Body ground Power switch on (IG) 11 to 14 V
      a9-2 (B1R) - Body ground Power switch off Below 1 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      a9-3 (ER) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT RIGHT SEAT)


    1. Remove the separate type front seat cushion cover (front right seat).

      Click here

    2. Inspect the separate type front seat cushion cover (front right seat).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT RIGHT SEAT) Click here

    OK

  5. INSPECT SEPARATE TYPE FRONT SEATBACK COVER (FRONT RIGHT SEAT)


    1. Remove the separate type front seatback cover (front right seat).

      Click here

    2. Inspect the separate type front seatback cover (front right seat).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SEPARATE TYPE FRONT SEATBACK COVER (FRONT RIGHT SEAT) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - SEPARATE TYPE FRONT SEAT CUSHION COVER (FRONT RIGHT SEAT))


    1. Disconnect the K11 and K10 air conditioning amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K10-15 (SHP+) - a9-5 (SWR) Always Below 1 Ω
      K10-15 (SHP+) - Body ground Always 10 kΩ or higher
      a9-5 (SWR) - Body ground Always 10 kΩ or higher
      K11-20 (TSR) - a9-1 (THR) Always Below 1 Ω
      K11-20 (TSR) - Body ground Always 10 kΩ or higher
      a9-1 (THR) - Body ground Always 10 kΩ or higher
      K11-34 (SG-3) - a9-7 (PR) Always Below 1 Ω
      K11-34 (SG-3) - Body ground Always 10 kΩ or higher
      a9-7 (PR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 11 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. CHECK HARNESS AND CONNECTOR (IG POWER SUPPLY - FRONT SEAT CUSHION PAD WITH COVER RH - BODY GROUND)


    1. A011OABC10
      *a

      Front view of wire harness connector

      (to Front Seat Cushion Pad with Cover RH)

      Disconnect the a9 front seat cushion pad with cover RH connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      a9-2 (B1R) - Body ground Power switch on (IG) 11 to 14 V
      a9-2 (B1R) - Body ground Power switch off Below 1 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      a9-3 (ER) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT FRONT SEAT CUSHION PAD WITH COVER RH


    1. Remove the front seat cushion pad with cover RH.

      Click here

    2. Inspect the front seat cushion pad with cover RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT CUSHION PAD WITH COVER RH Click here

    OK

  9. INSPECT FRONT SEATBACK PAD WITH COVER RH


    1. Remove the front seatback pad with cover RH.

      Click here

    2. Inspect the front seatback pad with cover RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEATBACK PAD WITH COVER RH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - FRONT SEAT CUSHION PAD WITH COVER RH)


    1. Disconnect the K11 and K10 air conditioning amplifier assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K10-15 (SHP+) - a9-5 (SWR) Always Below 1 Ω
      K10-15 (SHP+) - Body ground Always 10 kΩ or higher
      a9-5 (SWR) - Body ground Always 10 kΩ or higher
      K11-20 (TSR) - a9-1 (THR) Always Below 1 Ω
      K11-20 (TSR) - Body ground Always 10 kΩ or higher
      a9-1 (THR) - Body ground Always 10 kΩ or higher
      K11-34 (SG-3) - a9-7 (PR) Always Below 1 Ω
      K11-34 (SG-3) - Body ground Always 10 kΩ or higher
      a9-7 (PR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. REPLACE SEAT HEATER CONTROL SUB-ASSEMBLY RH


    1. Temporarily replace the seat heater control sub-assembly RH with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  12. CHECK SEAT HEATER OPERATION


    1. Check the seat heater.

      Click here

      OK
      The seat heater operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (SEAT HEATER CONTROL SUB-ASSEMBLY RH WAS DEFECTIVE)

    NG

  13. REPLACE REFRESHING SEAT SWITCH


    1. Temporarily replace the refreshing seat switch with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK SEAT HEATER OPERATION


    1. Check the seat heater.

      Click here

      OK
      The seat heater operates normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (REFRESHING SEAT SWITCH WAS DEFECTIVE)

    NG

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here