DIAGNOSIS FUNCTION


WARNING DISPLAY

When a malfunction occurs in the adaptive cruise control system (ACC), the figure will be displayed on the information screen of multi information display.
If the indicator continues to be displayed on the information screen of multi information display, check the diagnosis code that is set.

METHOD OF READING THE DIAGNOSIS CODE


Use the M.U.T.-III to read the diagnosis code (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, Diagnosis Function ).

METHOD OF ERASING THE DIAGNOSIS CODE


Use the M.U.T.-III to erase the diagnosis code (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, Diagnosis Function ).

CHECK OF THE FREEZE FRAME DATA


Various data of when the diagnosis code has been set is obtained, and the status of that time is stored. By analysing each data using M.U.T.-III, troubleshooting can be carried out efficiently.
Display items of the freeze frame data are as follows.

DISPLAY ITEM LIST
Item No.
 Item
 Unit/display contents
1
 Odometer
 km
2
 Odometer (Last time)
 km
3
 Frequency counter
 Count
4
 Operation counter
 Count
5
 System counter
 Count

FAIL-SAFE FUNCTIONS <ACC-ECU>



 If the ACC-ECU determines that the ACC is defective by means of its self-diagnosis, the ACC failure display or the ACC temporary failure display will illuminate.

Illumination condition of display in case of failure


Diagnosis code No.
 Item
 ACC failure display
 ACC temporary failure display
C1394
 Incompleted learn neutral (Steering wheel sensor)
 ON
 OFF
C1707
 Implausible coding data
 ON
 OFF
C1750
 Voltage out of range
 OFF
 ON
C1751
 ECU failure
 ON
 OFF
C1752
 Radar temperature out of range
 OFF
 ON
C1753
 Radar blockage detected
 OFF
 ON
C1754
 Radar calibration not completed
 OFF
 ON
C1768
 Alignment left compensation
 ON
 OFF
C1769
 Alignment right compensation
 ON
 OFF
C1770
 Reflector plate in the lowermost
 ON
 OFF
C1771
 Reflector plate in the uppermost
 ON
 OFF
C1772
 Alignment sensor too far right
 ON
 OFF
C1773
 Alignment sensor too far left
 ON
 OFF
C1774
 Alignment sensor too low
 ON
 OFF
C1775
 Alignment sensor too high
 ON
 OFF
C1776
 Received ACC failure from engine-ECU
 ON
 OFF
C1777
 System fail detected (ASC)
 ON
 OFF
C1778
 Vehicle speed signal failure
 ON
 OFF
C1779
 Brake master pressure signal failure
 ON
 OFF
C1780
 A basis signal failure
 ON
 OFF
C1781
 SAS failure
 ON
 OFF
C1782
 SAS signal failure
 ON
 OFF
C1783
 ACC distance switch fixed ON
 ON
 OFF
C1785
 Fault detection signal failure
 ON
 OFF
C1786
 Received limp home from T/M ECU
 ON
 OFF
U0100
 Engine CAN timeout
 ON
 OFF
U0101
 T/M CAN timeout
 ON
 OFF
U0121
 ABS/ASC CAN timeout
 ON
 OFF
U0126
 SAS CAN timeout
 ON
 OFF
U0141
 ETACS CAN timeout
 ON
 OFF
U1195
 Coding not completed
 ON
 OFF