Code No. C1752:
ACC/FCM Radar TEMP. Out of Range
| caution |
When the ACC/FCM-ECU is replaced, calibrate the
radar (refer to  ).
|
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
|
|
STEP 1. Check the radar temperature (high or low).
|
|
|
(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.
|
|
|
(2)Erase the diagnosis code.
|
|
|
(3)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
|
|
|
(5)Press the ACC ON/OFF switch to turn the ACC system to ON.
|
|
|
(6)On completion, check that the diagnosis code is set again.
|
|
|
Q.
Is diagnosis code No. C1752 set?
|
|
|
 Go to Step 2.
|
|
|
|
|
|
 This diagnosis is complete (Protection is deactivated).
|
|
|
|
|
|
STEP 2. M.U.T.-III data list.
|
|
|
Check the following data list (Refer to ).
|
|
|
- Item No. 2: RADAR temperature
|
|
|
Q.
Is the check result normal?
|
|
|
Intermittent malfunction (Refer to GROUP 00 -
How to Cope with Intermittent
Malfunction).
|
|
|
|
|
|
Replace the ACC/FCM-ECU (Refer to ).
|
|
|
|