Click here

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

Click here
Click here
DTC Code DTC Name
  Seat Heater for Front Right Seat does not Operate
Click here

DESCRIPTION

When the seat heater switch is operated, the air conditioning amplifier assembly receives the signal via CAN communication line. The air conditioning amplifier assembly receives the signal and operates the front seat heater.

Figure 2. for RHD: B004VLTE17
Figure 1. for LHD:
Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note:

  • If the auxiliary battery voltage is low, the seat heater system may not operate. When "High Power Consumption Partial Limit On AC/Heater Operation" 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

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

Tip:

If the auxiliary battery voltage is low, the seat heater system may not operate. When "High Power Consumption Partial Limit On AC/Heater Operation" 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

Click here

PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs.

      Click here


      1. Body Electrical > Air Conditioner > Clear DTCs


      Result
      Proceed to
      NEXT

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs.

      Click here


      1. Body Electrical > Air Conditioner > Trouble Codes


      OK
      DTC B14C0 is not output.
      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK HARNESS AND CONNECTOR (SEAT HEATER CONTROL SUB-ASSEMBLY RH - BATTERY)


    1. Disconnect the seat heater control sub-assembly RH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Q11-3 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Q11-1 (+B1) - Body ground Power switch off 11 to 14 V
      Q11-8 (+B2) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    INSPECT SEPARATE TYPE FRONT SEAT CUSHION COVER RH


    1. Remove the separate type front seat cushion cover RH.

      Click here

    2. Inspect the separate type front seat cushion cover RH.

      Click here

      Result
      Proceed to
      OK
      NG

  5. Click here

    INSPECT SEPARATE TYPE FRONT SEATBACK COVER RH


    1. Remove the separate type front seatback cover RH.

      Click here

    2. Inspect the separate type front seatback cover RH.

      Click here

      Result
      Proceed to
      OK
      NG

  6. Click here

    CHECK HARNESS AND CONNECTOR (SEPARATE TYPE FRONT SEAT CUSHION COVER RH - SEAT HEATER CONTROL SUB-ASSEMBLY RH AND BODY GROUND)


    1. Disconnect the Q15 separate type front seat cushion cover RH connector.

    2. Disconnect the Q11 seat heater control sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q15-6 - Q11-10 (E) Always Below 1 Ω
      Q15-6 or Q11-10 (E) - Other terminals and body ground Always 10 kΩ or higher
      Q15-1 - Q11-7 (Heater Output 1) Always Below 1 Ω
      Q15-1 or Q11-7 (Heater Output 1) - Other terminals and body ground Always 10 kΩ or higher
      Q15-3 - Q11-12 (Heater Output 2) Always Below 1 Ω
      Q15-3 or Q11-12 (Heater Output 2) - Other terminals and body ground Always 10 kΩ or higher
      Q15-2 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

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


    1. Disconnect the Q15 separate type front seat cushion cover RH connector.

    2. Disconnect the G63 and G64 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q15-4 - G63-18 (TSR) Always Below 1 Ω
      Q15-4 or G63-18 (TSR) - Other terminals and body ground Always 10 kΩ or higher
      Q15-5 - G64-8 (SG-5) Always Below 1 Ω
      Q15-5 or G64-8 (SG-5) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    CHECK HARNESS AND CONNECTOR (SEAT HEATER CONTROL SUB-ASSEMBLY RH - AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. Disconnect the Q11 seat heater control sub-assembly RH connector.

    2. Disconnect the G63 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q11-4 (PWM) - G63-16 (SHP+) Always Below 1 Ω
      Q11-4 (PWM) or G63-16 (SHP+) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    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

  10. Click here

    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

      REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here