Code No. C1752: FCM radar TEMP. out of range
DIAGNOSTIC FUNCTION
If the laser radar detects that the internal temperature of the ECU is 105°C or more, diagnosis code No. C1752 is set.
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This diagnosis code indicates that the protection control of the laser radar is activated and does not indicate a failure.
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CHECK CONDITION
When all the following conditions are satisfied.
- After the ignition switch is turned ON, two or more seconds passed.
- After the engine has started.
PROBABLE CAUSES
- High internal temperature of the laser radar
- Malfunction of the laser radar
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Check whether the diagnosis code is set again.
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Reduce the temperature of the laser radar to an appropriate temperature (90°C or less), and check again if the diagnosis code is set in the laser radar.
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(1)Move the vehicle to where the sunlight does not affect it, such as inside a building.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Leave the laser radar for a while to reduce the temperature to 90°C or less.
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The temperature of the laser radar can be checked with the service data (Refer to  ).
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(4)Erase the set diagnosis code.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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(7)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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 Replace the laser radar (Refer to ).
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 The procedure is complete (The protection control has been activated and no failure has occurred).
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