Dtc 015 Operating Block Caused By Overheating

Heater & Air Conditioning System. Lexus Is250, Is220D. Gse20 Ale20
Heater. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR ENGINE COOLANT LEAKS

CHECK ENGINE COOLANT QUALITY

INSPECT THERMOSTAT

INSPECT WATER PUMP ASSEMBLY

DTC 015 Operating Block caused by Overheating


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 assembly.
(Either or both of DTCs 012 and 014 are detected 10 times in a row.)
  1. Engine coolant circuit (for leaks, engine coolant quality, thermostat, water pump assembly)
  2. Combustion heater assembly

INSPECTION PROCEDURE

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


3.INSPECT THERMOSTAT

  1. Inspect the thermostat (Click here).



NG
REPLACE THERMOSTAT
OK


4.INSPECT WATER PUMP ASSEMBLY

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



NG
REPLACE WATER PUMP ASSEMBLY
OK

REPLACE COMBUSTION HEATER ASSEMBLY