Code No. C1752:
ACC/FCM Radar TEMP. Out of Range
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When the ACC/FCM-ECU is replaced, calibrate the
radar (refer to ).
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OPERATION
The ACC/FCM-ECU monitors temperature at the radar.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- The temperature which the ACC/FCM-ECU detects at the radar is below -40°C
or over 125°C.
PROBABLE CAUSES
- Severe driving condition (e.g. driving under high load)
- Malfunction of the ACC/FCM-ECU
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STEP 1. Check the radar temperature (high or low).
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(1)Turn the ignition switch to "LOCK" (OFF) position and then wait for a while so
that the radar at the ACC/FCM-ECU remains at appropriate temperature.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(5)Press the ACC ON/OFF switch to turn the ACC system to ON.
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(6)On completion, check that the diagnosis code is set again.
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Q.
Is diagnosis code No. C1752 set?
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Go to Step 2.
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This diagnosis is complete (Protection is deactivated).
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STEP 2. M.U.T.-III data list.
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Check the following data list (Refer to ).
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- Item No. 2: RADAR temperature
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 -
How to Cope with Intermittent
Malfunction).
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Replace the ACC/FCM-ECU (Refer to ).
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