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DIAGNOSIS FUNCTION
FCM/LDW/AHB-ECU has the following functions for easier system checks.
All the above items can be diagnosed using scan tool (M.U.T.-IIISE).
 
 
CHECK OF FREEZE FRAME DATA
The freeze frame data can be checked by using the scan tool (M.U.T.-IIISE).
 
 
When detecting fault and storing the DTC, the ECU connected to CAN bus line obtains the data before the determination of the DTC and the data when the DTC is determined, and then stores the ECU status of that time. By analyzing each data from scan tool (M.U.T.-IIISE), the troubleshooting can be performed more efficiently. The displayed items are as the table below.
Display item list
Item No.Item nameData itemUnit
1OdometerTotal driving distance at the first time a DTC has been setkm (mile)
2Odometer(Last time fail detect.)Total driving distance at the last time a DTC has been setkm (mile)
3Detection counterNumber of set DTCsNumber of counts
4Ignition cycleNumber of times the electric motor switch is turned "ON" or "LOCK (OFF)" after the past failure transitionNumber of counts
5ECU power supply voltageVoltage of power supply when the DTC is generatedV
6ECU temperatureFCM/LDW/AHB-ECU temperature at the time a DTC has been set°C (°F)
7Outside temperatureAmbient temperature at the time a DTC has been set°C (°F)
8Steering wheel angleSteering angle of steering wheel sensor when the DTC is generateddeg
9Accelerator pedal positionAccelerator pedal position when the DTC is generated%
10Yaw rateYaw rate of G and yaw rate sensor when the DTC is generateddeg/s
11AS&G statusNot used-
12A.S.C. statusASC control when the DTC is generated: A.S.C. ON/A.S.C. OFF/Not defined/A.S.C. fail-
13Master cylinder pressureMaster cylinder pressure of Master cylinder pressure sensor when the DTC is generatedMPa
14Longitudinal GLongitudinal G of G and yaw rate sensor when the DTC is generatedm/s2
15Lateral GLateral G of G and yaw rate sensor when the DTC is generatedm/s2
16Vehicle speedVehicle speed when the DTC is generatedkm/h (mph)
17FCM functionFCM function when the DTC is generated: OFF/ON-
18Camera/LaserRadar blockage stateBlockage state when the DTC is generated: Normal/Blocked-
19FCM auto brake requestFCM auto break when the DTC is generated: OFF/ON-
20FCM target decelerationFCM target deceleration when the DTC is generatedm/s2
21FCM brake prefill requestFCM brake prefill request when the DTC is generated: OFF/ON-
22FCM brake assist requestFCM brake assist request when the DTC is generated: OFF/ON-
23FCM engine brake requestFCM engine brake request when the DTC is generated: OFF/ON-
24FCM standstill requestFCM standstill request when the DTC is generated: OFF/ON-
25LDW functionLDW function when the DTC is generated: "OFF /Fail"/ON/Standby/Warning-
26Brake switchBrake switch when the DTC is generated: OFF/ON-
27Ignition/Electric motor switchElectric motor switch when the DTC 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
DTC No.ItemMulti information display messageFCM OFF indicatorLDW indicator display screenAutomatic high beam indicator
C1394INCOMP.learn neutral(SAS)FCM TEMPORARILY NOT AVAILABLEONONON
C1705LDW SW circuit low (short)LDW SERVICE REQUIREDOFFOFFON
C1707Implausible coding dataDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONOFFON
C1750Voltage out of rangeDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONONON
C1751ECU failureDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
C1752Radar temperature out of rangeDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONONON
C1753Radar blockage detectedDRIVER ASSISTANCE CAMERA BLOCKEDONONON
C1754Radar calibration not completedUNCALIBRATEDFlash (1 Hz)OFFOFF
C1777System fail detected (ASC)FCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C1778Vehicle speed signal failDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
C1779Brake master cylinder PRS.signalFCM SERVICE REQUIREDONNormal control*ON
C1781SAS failFCM SERVICE REQUIREDONOFFON
C1782SAS signal failFCM SERVICE REQUIREDONNormal control*ON
C1784FCM switch fixed ONFCM SERVICE REQUIREDONNormal control*ON
C1787APS signalFCM SERVICE REQUIREDONNormal control*ON
C1788Longitudinal G sensor signalFCM SERVICE REQUIREDONNormal control*ON
C1791Vehicle speed signal (invalid)DRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONONON
C1792Brake M/C PRS. signal (invalid)FCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C1793Lateral ACC. signal (invalid)FCM TEMPORARILY NOT AVAILABLEONONON
C1794Longitudinal G signal (invalid)FCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C1795Yawrate signal (invalid)FCM TEMPORARILY NOT AVAILABLEONONON
C1796APS signal (invalid)FCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C1798FCM control disabled (ASC)FCM SERVICE REQUIREDONNormal control*ON
C1809System temporary not availableDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONONON
C2256Brake switch signal failFCM SERVICE REQUIREDONNormal control*ON
C2271SAS signal failFCM TEMPORARILY NOT AVAILABLEONONON
C2272Delta SAS signal failFCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C2276Brake switch signalFCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C2292Auto calibration out of rangeDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONONON
C2298Ambient sensor signalFCM TEMPORARILY NOT AVAILABLEONNormal control*ON
C2299Implausible coding dataDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
U0121ABS/ASC CAN timeoutDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
U0126SAS CAN timeoutFCM SERVICE REQUIREDONNormal control*ON
U0141ETACS CAN timeoutDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFON
U110APHEV-ECU CAN timeoutFCM SERVICE REQUIREDONOFFOFF
U1190No receive fault detect signalDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
U1195Coding not completedDRIVER ASSISTANCE CAMERA TEMPORARILY NOT AVAILABLEONOFFOFF
-Bus offDRIVER ASSISTANCE CAMERA SERVICE REQUIREDONOFFOFF
-Calibration is in progressCALIBRATINGFlash (2 Hz)Flash (2 Hz)OFF
note*: The LDW indicator display is not associated with the relevant DTC.