Hint:
Past problems that seem unrelated may also help in some cases.

Operation flow
Symptom confirmation and diagnostic trouble codeUnmatched encryption code
Description
This dtc is output when a key with an incomplete key code is inserted into
the ignition key cylinder.
Inspection procedure
Reregister key
Clear the dtc (see page ei-18).
Reregister the key code with the transponder key ecu
(see page ei-5)
Check that the engine ...
Removal
Notice:
Do not heat the vehicle body, emblem and name plate
excessively.
Hint:
When removing the emblem and name plate, heat the vehicle
body, emblem and name plate using a heat light.
Standard heating temperature
Remove no. 1 Back door emblem assembly
Put protective tape aroun ...
Cooling fan system
Parts location
System diagram
On-vehicle inspection
Hint:
It is normal for the cooling fan to sometimes rotate when the
ignition switch is turned from acc to on.
Check cooling fan operation at low temperatures (below 94°c (201°f))
Turn the ignition switch on with the a/c ...