Code No.C1808: Noise error
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When the FCM-ECU is replaced, calibrate the radar (refer to  ).
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OPERATION
The FCM-ECU will disable the FCM when it detects a noise.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- The FCM-ECU detects a noise for at least 30 seconds.
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A diagnosis code is not set as a historic fault.
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PROBABLE CAUSES
- There are any device or facilities which generate a noise inside or outside the passenger compartment.
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Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set in the FCM-ECU.
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(1)Remove any noise source from the passenger compartment, or move the vehicle.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(4)On completion, check that the diagnosis code is set again.
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Q.
Is diagnosis code set?
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 Replace the FCM-ECU (Refer to ).
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 This diagnosis is complete.
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