DIAGNOSIS FUNCTION


HOW TO READ DIAGNOSIS CODE


Refer to GROUP 00 - Diagnosis function.

HOW TO ERASE DIAGNOSIS CODE


Refer to GROUP 00 - Diagnosis function.

CHECK OF FREEZE FRAME DATA


The freeze frame data can be checked by using the M.U.T.-III.
When detecting fault and storing the diagnosis code, the ECU connected to CAN bus line obtains the data before the determination of the diagnosis code and the data when the diagnosis code is determined, and then stores the ECU status of that time. By analysing each data from M.U.T.-III, the troubleshooting can be performed more efficiently. The displayed items are as the table below.

Display item list
Item No.
 Item name
 Data item
 Unit
1
 Odometer
 Total driving distance when the diagnosis code is generated
 km
2
 Odometer (Last time fail detect.)
 Total driving distance after the diagnosis code is generated (at the previous failure detection)
 km
3
 Detection counter
 Number of the same diagnosis codes (0 at the first failure detection)
 Times
4
 Ignition cycle
 Number of ignition switch ON times since the diagnosis code is set as past trouble
 Times
5
 ECU power supply voltage
 Power supply voltage when the diagnosis code is generated
 V
6
 RADAR temperature
 Inside temperature when the diagnosis code is generated
 °C
7
 Outside temperature
 Outside temperature when the diagnosis code is generated
 °C
9
 Accelerator pedal position
 Value of the accelerator position output from the engine ECU when the diagnosis code is generated
 %
12
 A.S.C. status
 ASC operating status when the diagnosis code is generated
 -
13
 Master cylinder pressure
 Value of the master cylinder pressure output from the master cylinder pressure sensor when the diagnosis code is generated
 MPa
14
 Longitudinal acceleration
 Value of longitudinal acceleration when the diagnosis code is generated
 m/s2
15
 Lateral acceleration
 Value of lateral acceleration when the diagnosis code is generated
 m/s2
16
 Vehicle speed
 Vehicle speed when the diagnosis code is generated
 km/h
17
 FCM function
 FCM-LS function status when the diagnosis code is generated
 -
18
 RADAR blockage status
 Laser radar status when the diagnosis code is generated
 -
19
 Auto brake request
 Automatic brake request status when the diagnosis code is generated
 -
20
 Auto brake acknowledge
 Automatic brake response status when the diagnosis code is generated
 -
21
 Target deceleration
 Target deceleration when the diagnosis code is generated
 m/s2
22
 Brake prefill request
 Prefill brake request status when the diagnosis code is generated
 -
23
 Brake assist request
 Brake assist request status when the diagnosis code is generated
 -
24
 Engine brake request
 Engine brake request status when the diagnosis code is generated
 -
25
 Standstill request
 Vehicle stop holding request status when the diagnosis code is generated
 -
26
 Brake prefill acknowledge
 Prefill brake response status when the diagnosis code is generated
 -
27
 Brake assist acknowledge
 Brake assist response when the diagnosis code is generated
 -
28
 Engine brake acknowledge
 Engine brake response status when the diagnosis code is generated
 -
29
 Standstill status
 Vehicle stop holding status when the diagnosis code is generated
 -

FAIL-SAFE FUNCTION


  • When the laser radar detects a failure with the diagnosis function, the FCM-LS indicator lamp and FCM-LS OFF indicator lamp turn on.
  • The laser radar detects dirt, snow, icing, foreign matters, and others on the windshield, the FCM-LS OFF indicator lamp flashes.
note When the ignition switch is turned ON (the engine is not started), the FCM-LS indicator lamp and FCM-LS OFF indicator lamp turn on, but it is not a failure.
Diagnosis code No.
 Item
 FCM-LS indicator lamp
 FCM-LS OFF indicator lamp
C1394
 INCOMP. learn neutral (SAS)
 ON
 ON
C1505
 Steering angle sensor
 ON
 ON
C1707
 Implausible coding data
 ON
 ON
C1747
 Shift signal undetermined
 ON
 ON
C1748
 FCM control disabled
 -
 ON
C1749
 Too long FCM activation
 ON
 ON
C1750
 FCM voltage out of range
 ON
 ON
C1751
 FCM ECU failure
 ON
 ON
C1752
 FCM radar TEMP. out of range
 ON
 ON
C1753
 FCM radar blockage detected
 -
 Flash
C1777
 ACC system fail detected (ASC)
 ON
 ON
C1778
 Vehicle speed signal fail
 ON
 ON
C1779
 Brake master cylinder PRS. signal
 ON
 ON
C1781
 SAS internal fail
 ON
 ON
C1782
 SAS signal fail
 ON
 ON
C1784
 FCM switch fixed ON
 ON
 ON
C1787
 APS signal
 ON
 ON
C1788
 Longitudinal G sensor signal
 ON
 ON
C1789
 FCM control signal (ASC No res.)
 ON
 ON
C1790
 FCM control signal (ASC)
 ON
 ON
C1791
 Vehicle speed signal (invalid)
 ON
 ON
C1792
 Brake M/C PRS. signal (invalid)
 ON
 ON
C1793
 Lateral ACC. signal (invalid)
 ON
 ON
C1794
 Longitudinal G signal (invalid)
 ON
 ON
C1795
 Yawrate signal (invalid)
 ON
 ON
C1796
 APS signal (invalid)
 ON
 ON
C1797
 Too many FCM interventions
 ON
 ON
C1798
 FCM control disabled (ASC)
 ON
 ON
C1799
 FCM control disabled (ENGINE)
 ON
 ON
U0100
 Engine CAN timeout
 ON
 ON
U0101
 T/M CAN timeout
 ON
 ON
U0121
 ABS/ASC CAN timeout
 ON
 ON
U0126
 SAS CAN timeout
 ON
 ON
U0141
 ETACS CAN timeout
 ON
 ON
U1195
 Coding not completed
 ON
 ON
U1197
 Coding data unavailable
 ON
 ON