COMBUSTION TYPE POWER HEATER SYSTEM, Diagnostic DTC:015

DTC Code DTC Name
015 Operating Block caused by Overheating

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area
015 Operating Block caused by Overheating The control overheating sensor detects overheating of the engine coolant, and the power heater ECU stops the operation of the heater assembly. (DTCs 012 and/or 014 are detected 10 times in a row.)

  • Engine coolant circuit (leaks, engine coolant quality, thermostat, water pump assembly)

  • Heater assembly

CAUTION / NOTICE / HINT

Tech Tips

Clear the DTCs by pressing the memory clear buttons on the tester to unlock the ECU.

PROCEDURE


  1. CHECK FOR ENGINE COOLANT LEAKS


    1. Check for engine coolant leaks.


      Result
      Proceed to
      OK
      NG

    NG

    REPAIR ENGINE COOLANT LEAKS for 2AD-FHV: Click here for 2AD-FTV: Click here for 2WW: Click here

    OK

  2. CHECK ENGINE COOLANT QUALITY


    1. Check the engine coolant quality.


      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE COOLANT

    OK

  3. INSPECT THERMOSTAT


    1. Remove the thermostat.


    2. Inspect the thermostat.


      Result
      Proceed to
      OK
      NG

    NG

    REPLACE THERMOSTAT for 2AD-FHV: Click here for 2AD-FTV: Click here for 2WW: Click here

    OK

  4. INSPECT WATER PUMP ASSEMBLY


    1. Remove the water pump assembly.


    2. Inspect the water pump assembly.


      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEATER ASSEMBLY Click here

    NG

    REPLACE WATER PUMP ASSEMBLY for 2AD-FHV: Click here for 2AD-FTV: Click here for 2WW: Click here