SEAT HEATER SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the seat heater system.

  • *: Use the GTS.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. INSPECT BATTERY VOLTAGE*


    1. Inspect the battery voltage.

      Standard voltage
      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery before proceeding.

    2. Using the GTS, inspect battery voltage reduction history "Battery Control Count (Body ECU)" in the Data List Click here.

    3. Using the GTS, check the Data List item "Operation Limitation Control History Count" Click here.

      Tech Tips

      When "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2)" both display a value other than "0", the operation of the seat heater system has been limited in the past. If the current operation is being limited, perform troubleshooting for the charging system, as "Operation of Electrical items Restricted" will be displayed on the multi-information display in the combination meter assembly.


      • PTC Heater (w/ PTC Heater)

      • Climate Control Seat System (w/ Climate Control Seat System)

      • Seat Heater System


      1. After performing an inspection, using the GTS, clear the values for "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2)".


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  3. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Using the GTS to check if the LIN communication system is functioning normally Click here.

      Result
      Result Proceed to
      LIN DTC is not output A
      LIN DTC is output B

      B

      Go to LIN COMMUNICATION SYSTEM Click here

      A

  4. CHECK FOR DTC*


    1. Check for DTCs Click here.

    2. Clear the DTCs Click here.

    3. Recheck for DTCs Click here.

      Result
      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

      B

      Go to step 7
      A

  5. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table Click here.

      Result
      Result Proceed to
      Fault is not listed in problem symptoms table A
      Fault is listed in problem symptoms table B

      B

      ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE
      A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING


    1. Terminals of ECU Click here.

    2. Operation Check Click here.


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  7. REPAIR OR REPLACE


    NEXT

  8. CONFIRMATION TEST


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    END