DIAGNOSIS FUNCTION


FCM/LDW/AHB-ECU has the following functions for easier system checks.

All the above items can be diagnosed using M.U.T.-III.

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 at the first time a diagnosis code has been set
 km
2
 Odometer(Last time fail detect.)
 Total driving distance at the last time a diagnosis code has been set
 km
3
 Detection counter
 Number of set diagnosis codes
 Number of counts
4
 Ignition cycle
 Number of times the ignition switch is turned "ON" or "LOCK (OFF)" after the past failure transition
 Number of counts
5
 ECU power supply voltage
 Voltage of power supply when the diagnosis code is generated
 V
6
 ECU temperature
 FCM/LDW/AHB-ECU temperature at the time a diagnosis code has been set
 °C
7
 Outside temperature
 Ambient temperature at the time a diagnosis code has been set
 °C
8
 Steering wheel angle
 Steering angle of steering wheel sensor when the diagnosis code is generated
 deg
9
 Accelerator pedal position
 Accelerator pedal position when the diagnosis code is generated
 %
10
 Yaw rate
 Yaw rate of G and yaw rate sensor when the diagnosis code is generated
 deg/s
11
 AS&G status
 Auto Stop & Go (AS&G) system when the diagnosis code is generated: Not active/Idle stop/Auto start/-
 -
12
 A.S.C. status
 ASC control when the diagnosis code is generated: A.S.C. ON/A.S.C. OFF/Not defined/A.S.C. fail
 -
13
 Master cylinder pressure
 Master cylinder pressure of Master cylinder pressure sensor when the diagnosis code is generated
 MPa
14
 Longitudinal G
 Longitudinal G of G and yaw rate sensor when the diagnosis code is generated
 m/s2
15
 Lateral G
 Lateral G of G and yaw rate sensor 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 function when the diagnosis code is generated: OFF/ON
 -
18
 Camera/LaserRadar blockage state
 Blockage state when the diagnosis code is generated: Normal/Blocked
 -
19
 FCM auto brake request
 FCM auto break when the diagnosis code is generated: OFF/ON
 -
20
 FCM target deceleration
 FCM target deceleration when the diagnosis code is generated
 m/s2
21
 FCM brake prefill request
 FCM brake prefill request when the diagnosis code is generated: OFF/ON
 -
22
 FCM brake assist request
 FCM brake assist request when the diagnosis code is generated: OFF/ON
 -
23
 FCM engine brake request
 FCM engine brake request when the diagnosis code is generated: OFF/ON
 -
24
 FCM standstill request
 FCM standstill request when the diagnosis code is generated: OFF/ON
 -
25
 LDW function
 LDW function when the diagnosis code is generated: "OFF /Fail"/ON/Standby/Warning
 -
26
 Brake switch
 Brake switch when the diagnosis code is generated: OFF/ON
 -
27
 Ignition/Electric motor switch
 Ignition switch when the diagnosis code is generated: Lock/ACC/ON/Start
 -

FAIL-SAFE FUNCTIONS


When the FCM/LDW/AHB-ECU detects any malfunction, it will show a message on the multi-information display and make the FCM OFF indicator display, the LDW indicator display and the automatic high beam indicator illuminate or flash.

Illumination condition of display in case of failure


Diagnosis code No.
 Item
 Multi information display
 Automatic high beam indicator
Message
 FCM OFF indicator display screen
 LDW indicator display screen
C1394
 INCOMP.learn neutral(SAS)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1705
 LDW SW circuit low (short)
 LDW SERVICE REQUIRED
 OFF
 OFF
 ON
C1707
 Implausible coding data
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 OFF
 ON
C1747
 Shift signal undetermined
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C1750
 Voltage out of range
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1751
 ECU failure
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
C1752
 Radar temperature out of range
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1753
 Radar blockage detected
 DRIVER ASSISTANCE CAMERA BLOCKED
 ON
 ON
 ON
C1754
 Radar calibration not completed
 UNCALIBRATED
 Flash (1 Hz)
 OFF
 OFF
C1777
 System fail detected (ASC)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C1778
 Vehicle speed signal fail
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
C1779
 Brake master cylinder PRS.signal
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C1781
 SAS fail
 FCM SERVICE REQUIRED
 ON
 OFF
 ON
C1782
 SAS signal fail
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C1784
 FCM switch fixed ON
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C1787
 APS signal
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C1788
 Longitudinal G sensor signal
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C1791
 Vehicle speed signal (invalid)
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1792
 Brake M/C PRS. signal (invalid)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C1793
 Lateral ACC. signal (invalid)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1794
 Longitudinal G signal (invalid)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C1795
 Yawrate signal (invalid)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C1796
 APS signal (invalid)
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C1798
 FCM control disabled (ASC)
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C2256
 Brake switch signal fail
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
C2271
 SAS signal fail
 FCM TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C2272
 Delta SAS signal fail
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C2276
 Brake switch signal
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C2292
 Auto calibration out of range
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 ON
 ON
C2298
 Ambient sensor signal
 FCM TEMPORARILY NOT AVAILABLE
 ON
 Normal control*
 ON
C2299
 Implausible coding data
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
U0100
 Engine CAN timeout
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
U0101
 T/M CAN timeout
 FCM SERVICE REQUIRED
 ON
 Normal control*
 ON
U0121
 ABS/ASC CAN timeout
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
U0126
 SAS CAN timeout
 FCM SERVICE REQUIRED
 ON
 OFF
 ON
U0141
 ETACS CAN timeout
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 ON
U1190
 No receive fault detect signal
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
U1195
 Coding not completed
 DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLE
 ON
 OFF
 OFF
-
 Bus off
 DRIVER ASSISTANCE CAMERA SERVICE REQUIRED
 ON
 OFF
 OFF
-
 Calibration is in progress
 CALIBRATING
 Flash (2 Hz)
 Flash (2 Hz)
 OFF
note *: The LDW indicator display is not associated with the relevant diagnosis code.