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DIAGNOSTIC FUNCTION
ASC-ECU has the following functions for easier system checks. All the following items can be diagnosed using the scan tool.
 
 
CHECK OF FREEZE FRAME DATA
The freeze frame data can be checked by using the scan tool.
 
 
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, the troubleshooting can be performed more efficiently. The displayed items are as the table below.
Display item list
Item No.Item nameContentUnit
1OdometerTotal driving distance after the DTC is generatedmile
2Ignition cycleNumber of times the ignition switch is turned "ON" or "LOCK" (OFF) after the past failure transitionNumber of counts is displayed.
4Accumulated minuteCumulative time for current malfunction of DTCmin
5Power supply voltageVoltage of power supply when the DTC is generatedV
8Lateral G sensorLateral G of G and yaw rate sensor when the DTC is generatedG
9G sensorLongitudinal G of G and yaw rate sensor when the DTC is generatedG
10Master cylinder pressureMaster cylinder pressure of Master cylinder pressure sensor when the DTC is generatedbar
11Steering angleSteering angle of steering wheel sensor when the DTC is generateddeg
12Yaw rate sensorYaw rate of G and yaw rate sensor when the DTC is generateddeg/s
13Stop light switchStop light switch condition when the DTC is generated: OFF/ON-
21Pump motorPump motor condition when the DTC is generated: OFF/ON-
28A.S.C./TCL off switchASC OFF switch condition when the DTC is generated: OFF/ON-
301ABS controlABS control when the DTC is generated: OFF/ON-
302Brake TCL controlTraction control (brake control) when the DTC is generated: OFF/ON-
303Engine TCL controlTraction control (engine control) when the DTC is generated: OFF/ON-
304A.S.C. ControlASC control when the DTC is generated: OFF/ON-
305Brake TCL operationTraction control (brake control) operation when the DTC is generated: Permission/Prohibition-
401FL wheel speed sensorWheel speed (FL) when the DTC is generatedmph
402FR wheel speed sensorWheel speed (FR) when the DTC is generatedmph
403RL wheel speed sensorWheel speed (RL) when the DTC is generatedmph
404RR wheel speed sensorWheel speed (RR) when the DTC is generatedmph
 
 
FAIL-SAFE FUNCTIONS
ASC-ECU constantly monitors the input and output signals. If an error is detected in the system, ASC-ECU sends a fail signal and the corresponding indicator light is illuminated or blinks. Various controls are processed depending on the cause of malfunction as shown below.
 
 
Illumination condition of warning light and display in case of failure
Diagnostic trouble code No.ItemBrake warning light,
brake warning display		ABS warning light,
ABS warning display		ASC warning light,
ASC warning display		ASC OFF light
ASC OFF display
C100AAbnormality in FL wheel speed sensor circuitOFF*1ON *2ONON
C1015Abnormality in FR wheel speed sensor circuit
C1020Abnormality in RL wheel speed sensor circuit
C102BAbnormality in RR wheel speed sensor circuit
C1011Abnormality in FL wheel speed sensor signalOFF*1ON *2ONON
C101CAbnormality in FR wheel speed sensor signal
C1027Abnormality in RL wheel speed sensor signal
C1032Abnormality in RR wheel speed sensor signal
C1014Mutual monitoring of FL wheel speed sensorOFF*1ON *2ONON
C101FMutual monitoring of FR wheel speed sensor
C102AMutual monitoring of RL wheel speed sensor
C1035Mutual monitoring of RR wheel speed sensor
C1041Abnormality in periodical signal for FL wheel speed sensorOFF*1ON *2ONON
C1042Abnormality in periodical signal for FR wheel speed sensor
C1043Abnormality in periodical signal for RL wheel speed sensor
C1044Abnormality in periodical signal for RR wheel speed sensor
C1046FL wheel speed sensor control phase time exceededOFF*1ON *2ONON
C1047FR wheel speed sensor control phase time exceeded
C1048RL wheel speed sensor control phase time exceeded
C1049RR wheel speed sensor control phase time exceeded
C104BAbnormality in FL wheel inlet valve systemONONONON
C104FAbnormality in FR wheel inlet valve system
C1053Abnormality in RL wheel inlet valve system
C1057Abnormality in RR wheel inlet valve system
C105FAbnormality in FL wheel outlet valve systemONONONON
C1063Abnormality in FR wheel outlet valve system
C1067Abnormality in RL wheel outlet valve system
C105BAbnormality in RR wheel outlet valve system
C1200Abnormality in FL/RR wheel cut valve systemONONONON
C1204Abnormality in FR/RL wheel cut valve system
C1208Abnormality in FL/RR wheel suction valve system
C120CAbnormality in FR/RL wheel suction valve system
C2104Faulty valve power supply circuitONONONON
C1073Faulty motor drive circuitOFFON *2ONON
C2116Low or high power supply voltage in pump motorOFFON *2ONON
C121DAbnormality in brake fluid pressure sensor circuitOFFONONON
C121EAbnormality in brake fluid pressure sensor output signalOFFONONON
C1000Abnormality in stop light switch circuitOFFOFFONON
C123BProlonged operation of ASCOFFOFFONON
C2200Abnormality in ASC-ECUONONONON
C2101Abnormality in battery voltage (high voltage)18.0 ± 1.0 V or moreONONONON
C1395Brake fluid charging incompletionOFF
  • ABS warning light: Flashing (1 Hz)
  • ABS warning display: ON
OFFOFF
C121CTorque request signal rejectionOFFOFFONON
C2203VIN not recordedOFFONOFFOFF
C2206Re-execution of variant codingOFFONONON
C1210*5Abnormality in G & yaw rate sensorAbnormality in longitudinal G-sensor output voltageOFFONONON
C1242*5Abnormality in G & yaw rate sensorAbnormality in longitudinal G-sensor output signalOFFONONON
C123CAbnormality in G & yaw rate sensorAbnormality in lateral G-sensor and yaw rate output valueOFFOFFONON
C1392Incomplete learn (Longitudinal G)ONONONON
C1393Incomplete learn neutral(Lateral G)ONONONON
C2204Internal abnormality in G & yaw rate sensorOFF
  • OFF*4
  • ON*5, 7
ONON
C2111Brake fluid pressure sensor power supply circuitLow inputOFFONONON
C2112Brake fluid pressure sensor power supply circuitHigh inputOFFONONON
C123AAbnormality in sensor calibrationOFF
  • OFF*4
  • ON*5, 7
ONON
C1219Abnormality in steering wheel sensor signalOFFOFFONON
C121AAbnormality in steering wheel sensor initializationSteering wheel sensor neutral point not learnedOFF
  • ABS warning light: Flashing (2 Hz)
  • ABS warning display: ON
ONON
C2205Internal abnormality in steering wheel sensorOFFOFFONON
C2002Valve calibration errorONONONON
C2003Control parameter not implementOFFOFFOFFON
C1608Implausible diagnosis dataOFFOFFOFFOFF
U0001Bus-offOFFOFFOFFOFF
U0100Engine time-out errorOFFOFFOFFOFF
U0101CVT time-out errorOFFOFFOFFOFF
U0114*5AWD-ECU time-out errorOFFOFFOFFOFF
U0126Steering wheel sensor time-out errorOFFOFFOFFOFF
U0141ETACS time-out errorOFFOFFONOFF
U0401Engine malfunction detectedOFFOFFONON
U0428Steering wheel sensor CRC, message errorOFFOFFONON
U1197Coding data unavailableOFFONONON
U1417Variant coding value invalid (includes faulty installation)OFFON*7ONON
note
  • *1: Turns on when two or more wheels are faulty.
  • *2: Stays on until the vehicle speed reaches 6 mph (10 km/h) when the ignition switch is turned to ON next time.
  • *3: This diagnostic trouble code is not set with the vehicle speed of 12 mph (20 km/h) or less.
  • *4: FWD.
  • *5: AWD.
  • *6: Does not illuminate when there is no effect to the EBD function.
  • *7: Does not illuminate when there is no effect to the ABS function.
 
 
Under EBD, ABS, stability control, HSA and TCL control in case of failure
Diagnostic trouble code No.ItemEBDABSStability controlTCLHSA
C100AAbnormality in FL wheel speed sensor circuitEnabled *1ProhibitedProhibitedProhibitedProhibited
C1015Abnormality in FR wheel speed sensor circuit
C1020Abnormality in RL wheel speed sensor circuit
C102BAbnormality in RR wheel speed sensor circuit
C1011Abnormality in FL wheel speed sensor signalEnabled *1ProhibitedProhibitedProhibitedProhibited
C101CAbnormality in FR wheel speed sensor signal
C1027Abnormality in RL wheel speed sensor signal
C1032Abnormality in RR wheel speed sensor signal
C1014Mutual monitoring of FL wheel speed sensorEnabled *1ProhibitedProhibitedProhibitedProhibited
C101FMutual monitoring of FR wheel speed sensor
C102AMutual monitoring of RL wheel speed sensor
C1035Mutual monitoring of RR wheel speed sensor
C1041Abnormality in periodical signal for FL wheel speed sensorEnabled *1ProhibitedProhibitedProhibitedProhibited
C1042Abnormality in periodical signal for FR wheel speed sensor
C1043Abnormality in periodical signal for RL wheel speed sensor
C1044Abnormality in periodical signal for RR wheel speed sensor
C1046FL wheel speed sensor control phase time exceededEnabled *1ProhibitedProhibitedProhibitedProhibited
C1047FR wheel speed sensor control phase time exceeded
C1048RL wheel speed sensor control phase time exceeded
C1049RR wheel speed sensor control phase time exceeded
C104BAbnormality in FL wheel inlet valve systemProhibitedProhibitedProhibitedProhibitedProhibited
C104FAbnormality in FR wheel inlet valve system
C1053Abnormality in RL wheel inlet valve system
C1057Abnormality in RR wheel inlet valve system
C105FAbnormality in FL wheel outlet valve systemProhibitedProhibitedProhibitedProhibitedProhibited
C1063Abnormality in FR wheel outlet valve system
C1067Abnormality in RL wheel outlet valve system
C105BAbnormality in RR wheel outlet valve system
C1200Abnormality in FL/RR wheel cut valve systemProhibitedProhibitedProhibitedProhibitedProhibited
C1204Abnormality in FR/RL wheel cut valve system
C1208Abnormality in FL/RR wheel suction valve system
C120CAbnormality in FR/RL wheel suction valve system
C2104Faulty valve power supply circuitProhibitedProhibitedProhibitedProhibitedProhibited
C1073Faulty motor drive circuitEnabledProhibitedProhibitedProhibitedProhibited
C2116Low or high power supply voltage in pump motorEnabledProhibitedProhibitedProhibitedProhibited
C121DAbnormality in brake fluid pressure sensor circuitEnabledProhibitedProhibitedProhibitedProhibited
C121EAbnormality in brake fluid pressure sensor output signalEnabledProhibitedProhibitedProhibitedProhibited
C1000Abnormality in stop light switch circuitEnabledEnabledProhibitedProhibitedProhibited
C123BProlonged operation of ASCEnabledEnabledProhibitedProhibitedProhibited
C2200Abnormality in ASC-ECUProhibited*5Prohibited*6ProhibitedProhibitedProhibited
C2101Abnormality in battery voltage (high voltage)18.0 ± 1.0 V or moreProhibitedProhibitedProhibitedProhibitedProhibited
C1395Brake fluid charging incompletionEnabledProhibitedProhibitedProhibitedProhibited
C121CTorque request signal rejectionEnabledEnabledProhibitedProhibitedProhibited
C1290CAN time-out errorEnabledEnabledProhibitedProhibitedProhibited
C2203VIN not recordedEnabledEnabledEnabledEnabledEnabled
C1210*4Abnormality in G & yaw rate sensorAbnormality in longitudinal G-sensor output voltageEnabledProhibitedProhibitedProhibitedProhibited
C1242*4Abnormality in G & yaw rate sensorAbnormality in longitudinal G-sensor output signalEnabledProhibitedProhibitedProhibitedProhibited
C123CAbnormality in G & yaw rate sensorAbnormality in lateral G and yaw rate output valueEnabledEnabledProhibitedProhibitedProhibited
C1392Incomplete learn (Longitudinal G)Enabled
  • Enabled*3
  • Prohibited*4
  • Enabled*3
  • Prohibited*4
  • Enabled*3
  • Prohibited*4
Prohibited
C1393Incomplete learn neutral(Lateral G)EnabledEnabledProhibitedProhibitedProhibited
C2204Internal abnormality in G & yaw rate sensorEnabled
  • Enabled*3
  • Prohibited*4
ProhibitedProhibitedProhibited
C2111Brake fluid pressure sensor power supply circuitLow inputEnabledProhibitedProhibitedProhibitedProhibited
C2112Brake fluid pressure sensor power supply circuitHigh inputEnabledProhibitedProhibitedProhibitedProhibited
C123AAbnormality in sensor calibrationEnabledProhibitedProhibitedProhibitedProhibited
C1219Abnormality in steering wheel sensor signalEnabledEnabledProhibitedProhibitedProhibited
C121AAbnormality in steering wheel sensor initializationSteering wheel sensor neutral point not learnedEnabledEnabledProhibitedProhibitedProhibited
C2205Internal abnormality in steering wheel sensorEnabledEnabledProhibitedProhibitedProhibited
C2002Valve calibration not completedProhibitedProhibitedProhibitedProhibitedProhibited
C2003Control parameter not implementEnabledEnabledProhibitedProhibitedProhibited
C1608Implausible diagnosis dataEnabledEnabledEnabledEnabledEnabled
U0001Bus-offEnabledEnabledEnabledEnabledEnabled
U0100Engine time-out errorEnabledEnabledEnabledEnabledEnabled
U0101CVT time-out errorEnabledEnabledEnabledEnabledEnabled
U0114*4AWD-ECU time-out errorEnabledEnabledEnabledEnabledEnabled
U0126Steering wheel sensor time-out errorEnabledEnabledEnabledEnabledEnabled
U0141ETACS time-out errorEnabledEnabledEnabledEnabledEnabled
U0401Engine malfunction detectedEnabledEnabledProhibitedProhibitedProhibited
U0428Steering wheel sensor CRC, message errorEnabledEnabledProhibitedProhibitedProhibited
U1197Coding data unavailableEnabledProhibitedProhibitedProhibitedProhibited
U1417Variant coding value invalid (includes faulty installation)EnabledProhibited*6ProhibitedProhibitedProhibited
note
  • *1: Prohibited when two or more wheels are faulty.
  • *2: This diagnostic trouble code is not set with the vehicle speed of 12 mph (20 km/h) or less.
  • *3: FWD.
  • *4: AWD.
  • *5: Not prohibited when the brake warning light is not illuminated.
  • *6: Not prohibited when the ABS warning light is not illuminated.