DTC    015    Operating Block caused by Overheating

for Preparation Click here


DESCRIPTION


DTC No.
DTC Detection Condition
Trouble Area
015
The control overheating sensor detects overheating of the engine coolant, and the power heater ECU stops the operation of the combustion heater.
(Either or both of DTCs 012 and 014 are detected 10 times in a row.)
  1. Engine coolant circuit (leaks, engine coolant quality, thermostat, water pump assembly)
  2. Power heater ECU (combustion heater assembly)

INSPECTION PROCEDURE

HINT:
Output of this DTC indicates that the combustion heater has been locked by the power heater ECU and cannot be operated. Clear the DTCs by pressing the memory clear buttons on the DTC tester to unlock the power heater ECU (Click here).

1.CHECK FOR ENGINE COOLANT LEAKS

  1. Check for engine coolant leaks (Click here).



NG
REPAIR ENGINE COOLANT LEAKS
OK


2.CHECK ENGINE COOLANT QUALITY

  1. Check the engine coolant quality (Click here).



NG
REPLACE ENGINE COOLANT (Click here)
OK


3.INSPECT THERMOSTAT

  1. Inspect the thermostat (Click here).



NG
REPLACE THERMOSTAT (Click here)
OK


4.INSPECT WATER PUMP ASSEMBLY

  1. Inspect the water pump assembly (Click here).



NG
REPLACE WATER PUMP ASSEMBLY (Click here)
OK

REPLACE COMBUSTION HEATER ASSEMBLY (Click here)