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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 in the following table.

Illumination condition of warning light and display in case of failure 

WARNING LIGHT CONDITION CHART

DTC Item Brake warning light, brake warning display ABS warning light, ABS warning display ASC operation display ASC OFF display, ASC OFF light
C100A Abnormality in FL wheel speed sensor circuit OFF (1) ON (2) ON ON
C1015 Abnormality in FR wheel speed sensor circuit
C1020 Abnormality in RL wheel speed sensor circuit
C102B Abnormality in RR wheel speed sensor circuit
C1011 Abnormality in FL wheel speed sensor signal OFF (1) ON (2) ON ON
C101C Abnormality in FR wheel speed sensor signal
C1027 Abnormality in RL wheel speed sensor signal
C1032 Abnormality in RR wheel speed sensor signal
C1014 Mutual monitoring of FL wheel speed sensor OFF (1) ON (2) ON ON
C101F Mutual monitoring of FR wheel speed sensor
C102A Mutual monitoring of RL wheel speed sensor
C1035 Mutual monitoring of RR wheel speed sensor
C1041 Abnormality in periodical signal for FL wheel speed sensor OFF (1) ON (2) ON ON
C1042 Abnormality in periodical signal for FR wheel speed sensor
C1043 Abnormality in periodical signal for RL wheel speed sensor
C1044 Abnormality in periodical signal for RR wheel speed sensor
C1046 FL wheel speed sensor control phase time exceeded OFF (1) ON (2) ON ON
C1047 FR wheel speed sensor control phase time exceeded
C1048 RL wheel speed sensor control phase time exceeded
C1049 RR wheel speed sensor control phase time exceeded
C104B Abnormality in FL wheel inlet valve system ON ON ON ON
C104F Abnormality in FR wheel inlet valve system
C1053 Abnormality in RL wheel inlet valve system
C1057 Abnormality in RR wheel inlet valve system
C105F Abnormality in FL wheel outlet valve system ON ON ON ON
C1063 Abnormality in FR wheel outlet valve system
C1067 Abnormality in RL wheel outlet valve system
C105B Abnormality in RR wheel outlet valve system
C1200 Abnormality in FL/RR wheel cut valve system ON ON ON ON
C1204 Abnormality in FR/RL wheel cut valve system
C1208 Abnormality in FL/RR wheel suction valve system
C120C Abnormality in FR/RL wheel suction valve system
C2104 Faulty valve power supply circuit ON ON ON ON
C1073 Faulty motor drive circuit OFF ON (2) ON ON
C2116 Low power supply voltage in pump motor OFF ON (2) ON ON
C121D Abnormality in brake fluid pressure sensor circuit OFF ON ON ON
C121E Abnormality in brake fluid pressure sensor output signal OFF ON ON ON
C1000 Abnormality in stop light switch circuit OFF OFF ON ON
C1009 Low brake fluid level ON (6) OFF ON ON
C123B Prolonged operation of ASC OFF OFF ON ON
C2200 Abnormality in ASC-ECU ON ON ON ON
C2100 Abnormality in battery voltage (low voltage) 9.7 ± 0.3 V or less OFF ON ON ON
8.0 ± 0.5 V or less (3) ON ON ON ON
C2101 Abnormality in battery voltage (high voltage) 18.0 ± 1.0 V or more ON ON ON ON
C1395 Brake fluid filling not completed OFF ABS warning light: Flashing (1 Hz) ABS warning display: ON OFF OFF
C121C Torque request signal rejection OFF OFF ON ON
C1290 CAN time-out error OFF OFF ON ON
C2203 VIN not recorded OFF ON OFF OFF
C1210 (5) Abnormality in G & yaw rate sensor Abnormality in longitudinal G-sensor output voltage OFF ON ON ON
C1242 (5) Abnormality in G & yaw rate sensor Abnormality in longitudinal G-sensor output signal OFF ON ON ON
C123C Abnormality in G & yaw rate sensor Abnormality in lateral G-sensor output value OFF OFF ON ON
Abnormality in yaw rate sensor output value OFF OFF ON ON
C2204 Internal abnormality in G & yaw rate sensor Communication error OFF OFF (4)
ON (5)		 ON ON
Abnormality in lateral G-sensor output voltage OFF OFF ON ON
Abnormality in yaw rate sensor output voltage OFF OFF ON ON
Abnormality in G & yaw rate sensor supply voltage OFF OFF (4) ON (5) ON ON
C2111 Brake fluid pressure sensor power supply circuit Low input OFF ON ON ON
C2112 Brake fluid pressure sensor power supply circuit High input OFF ON ON ON
C2114 Abnormality in G & yaw rate sensor operation voltage Low voltage (6.5 ± 0.5 V or less) OFF OFF (4)
ON (5)		 ON ON
C2115 Abnormality in G & yaw rate sensor operation voltage High voltage (18.0 ± 1.0 V or more) OFF OFF (4)
ON (5)		 ON ON
C123A Abnormality in sensor calibration OFF OFF (4)
ON (5)		 ON ON
C1219 Abnormality in steering wheel sensor signal OFF OFF ON ON
C121A Abnormality in steering wheel sensor calibration Steering wheel sensor neutral point not learned OFF ABS warning light: Flashing (2 Hz) ABS warning display: ON ON ON
C2205 Internal abnormality in steering wheel sensor OFF OFF ON ON
C2002 Valve calibration error ON ON ON ON
C2003 Control parameter not implement OFF OFF ON ON
C1608 Implausible diagnosis data OFF OFF OFF OFF
U0001 Bus-off OFF OFF OFF OFF
U0100 Engine time-out error OFF OFF OFF OFF
U0101 CVT or TC-SST time-out error OFF OFF OFF OFF
U0126 Steering wheel sensor time-out error OFF OFF OFF OFF
U0141 ETACS time-out error OFF OFF OFF OFF
U0136 (5) AWC time-out error OFF OFF OFF OFF
U0125 G & yaw rate sensor message time-out error/message error OFF OFF (4)
ON (5)		 ON ON
U0401 Engine signal malfunction detected OFF OFF ON ON
U0428 Steering wheel sensor CRC, message error OFF OFF ON ON
U1003 G & yaw rate sensor bus-off OFF OFF (4)
ON (5)		 ON ON
U1415 Variant coding not implemented OFF ON ON ON
U1417 Variant coding value invalid (includes faulty installation) OFF ON ON ON
(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 DTC is not set with the vehicle speed of 12 mph (20 km/h) or less.
(4) Except vehicles for RALLIART.
(5) Vehicles for RALLIART.
(6) The combination meter-ECU determines the illumination.

Under EBD, ABS, skid control, and TCL control in case of failure 

DTC ITEM CHART

DTC Item EBD ABS Skid control TCL
C100A Abnormality in FL wheel speed sensor circuit Enabled (Prohibited when two or more wheels have fault.) Prohibited Prohibited Prohibited
C1015 Abnormality in FR wheel speed sensor circuit
C1020 Abnormality in RL wheel speed sensor circuit
C102B Abnormality in RR wheel speed sensor circuit
C1011 Abnormality in FL wheel speed sensor signal Enabled (Prohibited when two or more wheels have fault.) Prohibited Prohibited Prohibited
C101C Abnormality in FR wheel speed sensor signal
C1027 Abnormality in RL wheel speed sensor signal
C1032 Abnormality in RR wheel speed sensor signal
C1014 Mutual monitoring of FL wheel speed sensor Enabled (Prohibited when two or more wheels have fault.) Prohibited Prohibited Prohibited
C101F Mutual monitoring of FR wheel speed sensor
C102A Mutual monitoring of RL wheel speed sensor
C1035 Mutual monitoring of RR wheel speed sensor
C1041 Abnormality in periodical signal for FL wheel speed sensor Enabled (Prohibited when two or more wheels have fault.) Prohibited Prohibited Prohibited
C1042 Abnormality in periodical signal for FR wheel speed sensor
C1043 Abnormality in periodical signal for RL wheel speed sensor
C1044 Abnormality in periodical signal for RR wheel speed sensor
C1046 FL wheel speed sensor control phase time exceeded Enabled (Prohibited when two or more wheels have fault.) Prohibited Prohibited Prohibited
C1047 FR wheel speed sensor control phase time exceeded
C1048 RL wheel speed sensor control phase time exceeded
C1049 RR wheel speed sensor control phase time exceeded
C104B Abnormality in FL wheel inlet valve system Prohibited Prohibited Prohibited Prohibited
C104F Abnormality in FR wheel inlet valve system
C1053 Abnormality in RL wheel inlet valve system
C1057 Abnormality in RR wheel inlet valve system
C105F Abnormality in FL wheel outlet valve system Prohibited Prohibited Prohibited Prohibited
C1063 Abnormality in FR wheel outlet valve system
C1067 Abnormality in RL wheel outlet valve system
C105B Abnormality in RR wheel outlet valve system
C1200 Abnormality in FL/RR wheel cut valve system Prohibited Prohibited Prohibited Prohibited
C1204 Abnormality in FR/RL wheel cut valve system
C1208 Abnormality in FL/RR wheel suction valve system
C120C Abnormality in FR/RL wheel suction valve system
C2104 Faulty valve power supply circuit Prohibited Prohibited Prohibited Prohibited
C1073 Faulty motor drive circuit Enabled Prohibited Prohibited Prohibited
C2116 Low power supply voltage in pump motor Enabled Prohibited Prohibited Prohibited
C121D Abnormality in brake fluid pressure sensor circuit Enabled Prohibited Prohibited Prohibited
C121E Abnormality in brake fluid pressure sensor output signal Enabled Prohibited Prohibited Prohibited
C1000 Abnormality in stop light switch circuit Enabled Enabled Prohibited Prohibited
C1009 Low brake fluid level Enabled Enabled Prohibited Prohibited
C123B Prolonged operation of ASC Enabled Enabled Prohibited Prohibited
C2200 Abnormality in ASC-ECU Prohibited Prohibited Prohibited Prohibited
C2100 Abnormality in battery voltage (low voltage) 9.7 ± 0.3 V or less Enabled Prohibited Prohibited Prohibited
8.0 ± 0.5 V or less (1) Prohibited Prohibited Prohibited Prohibited
C2101 Abnormality in battery voltage (high voltage) 18.0 ± 1.0 V or more Prohibited Prohibited Prohibited Prohibited
C1395 Brake fluid filling not completed Enabled Enabled Enabled Enabled
C121C Torque request signal rejection Enabled Enabled Prohibited Prohibited
C1290 CAN time-out error Enabled Enabled Prohibited Prohibited
C2203 VIN not recorded Enabled Enabled Enabled Enabled
C1210 (3) Abnormality in G & yaw rate sensor Abnormality in longitudinal G-sensor output voltage Enabled Prohibited Prohibited Prohibited
C1242 (3) Abnormality in G & yaw rate sensor Abnormality in longitudinal G-sensor output signal Enabled Prohibited Prohibited Prohibited
C123C Abnormality in G & yaw rate sensor Abnormality in lateral G-sensor output value Enabled Enabled Prohibited Prohibited
Abnormality in yaw rate sensor output value Enabled Enabled Prohibited Prohibited
C2204 Internal abnormality in G & yaw rate sensor Communication error Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
Abnormality in lateral G-sensor output voltage Enabled Enabled Prohibited Prohibited
Abnormality in yaw rate sensor output voltage Enabled Enabled Prohibited Prohibited
Abnormality in G & yaw rate sensor supply voltage Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
C2111 Brake fluid pressure sensor power supply circuit Low input Enabled Prohibited Prohibited Prohibited
C2112 Brake fluid pressure sensor power supply circuit High input Enabled Prohibited Prohibited Prohibited
C2114 Abnormality in G & yaw rate sensor operation voltage Low voltage (6.5 ± 0.5 V or less) Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
C2115 Abnormality in G & yaw rate sensor operation voltage High voltage (18.0 ± 1.0 V or more) Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
C123A Abnormality in sensor calibration Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
C1219 Abnormality in steering wheel sensor signal Enabled Enabled Prohibited Prohibited
C121A Abnormality in steering wheel sensor calibration Steering wheel sensor neutral point not learned Enabled Enabled Prohibited Prohibited
C2205 Internal abnormality in steering wheel sensor Enabled Enabled Prohibited Prohibited
C2002 Valve calibration error Prohibited Prohibited Prohibited Prohibited
C2003 Control parameter not implement Enabled Enabled Prohibited Prohibited
C1608 Implausible diagnosis data Enabled Enabled Enabled Enabled
U0001 Bus-off Enabled Enabled Enabled Enabled
U0100 Engine time-out error Enabled Enabled Enabled Enabled
U0101 CVT or TC-SST time-out error Enabled Enabled Enabled Enabled
U0126 Steering wheel sensor time-out error Enabled Enabled Enabled Enabled
U0141 ETACS time-out error Enabled Enabled Enabled Enabled
U0136 (3) AWC time-out error Enabled Enabled Enabled Enabled
U0125 G & yaw rate sensor message time-out error/message error Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
U0401 Engine signal malfunction detected Enabled Enabled Prohibited Prohibited
U0428 Steering wheel sensor CRC, message error Enabled Enabled Prohibited Prohibited
U1003 G & yaw rate sensor bus-off Enabled Enabled (2)
Prohibited (3)		 Prohibited Prohibited
U1415 Variant coding not implemented Enabled Prohibited Prohibited Prohibited
U1417 Variant coding value invalid (includes faulty installation) Enabled Prohibited Prohibited Prohibited
(1) This DTC is not set with the vehicle speed of 12 mph (20 km/h) or less.
(2) Except vehicles for RALLIART.
(3) Vehicles for RALLIART.
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