1. INSPECT FINS BLOCKAGE

If the fins are clogged, wash them with water or a steam cleaner.
Dry with compressed air.
NOTICE: If the distance between the steam cleaner and the core is too close, the fins may become damaged.
Keep the following injection distance.
Standard:

ComponentsSymptom confirmation and diagnostic trouble code
HINT:
The diagnostic system in the HIGHLANDER has various functions.
The first function is the Diagnostic Trouble Code (DTC) check. A DTC
is a code stored in the ECU
memory whenever a malfunction in the signal circuits to the ECU occurs. In a
DTC check, a previous
malfunction's DTC ca ...