ASC-ECU



SYSTEM CONFIGURATION



CONTROL DESCRIPTION



Example of Active Stability Control operation






Example of the effect of control




Joint control



Control system
 Control content
ABS
 Even during ASC operation, ABS performance is improved from the joint operation of the ASC control.
TCL
 During acceleration, engine output is governed through joint operation with ASC.

Example of TCL control



FAIL-SAFE AND DIAGNOSTIC FUNCTIONS





  • Diagnosis code set
  • Service data output
  • Actuator test

FAIL-SAFE FUNCTION


Diagnosis code No.
 Item
 EBD
 ABS
 ASC
 TCL
Engine control
 Brake control
 Engine control
 Brake control
C100A
 Abnormality in FL wheel speed sensor circuit
 Enabled (Prohibited when two or more wheels have fault.)
 Prohibited
 Prohibited
 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
 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
 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
 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
 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
 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
 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
 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
 Prohibited
 Prohibited
C1073
 Faulty motor drive circuit
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2116
 Low power supply voltage in pump motor
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C121D
 Abnormality in brake fluid pressure sensor circuit
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C121E
 Abnormality in brake fluid pressure sensor output signal
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1000
 Abnormality in stop lamp switch circuit
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1009
 Low brake fluid level
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C123B
 Prolonged operation of ASC
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2200
 Abnormality in ASC-ECU
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2100*1
 Abnormality in battery voltage (low voltage)
 9.7 ± 0.3 V or less
Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
8.0 ± 0.5 V or less
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2101
 Abnormality in battery voltage (high voltage)
 18.0 ± 1.0 V or more
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C121C
 Torque request signal rejection
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1290
 CAN time-out error
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2203
 VIN not recorded
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
C1210*3
 Abnormality in G & yaw rate sensor
 Abnormality in longitudinal G-sensor output voltage
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1242*3
 Abnormality in G & yaw rate sensor
 Abnormality in longitudinal G-sensor output signal
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C123C
 Abnormality in G & yaw rate sensor
 Abnormality in lateral G-sensor output value
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
Abnormality in yaw rate sensor output value
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2204
 Internal abnormality in G & yaw rate sensor
 Communication error
 Enabled
 Prohibited*3 or Enabled*4
 Prohibited
 Prohibited
 Prohibited
 Prohibited
Abnormality in longitudinal G-sensor output voltage
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
Abnormality in lateral G-sensor output voltage*3
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
Abnormality in yaw rate sensor output voltage
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
Abnormality in G & yaw rate sensor supply voltage
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2111
 Sensor power supply circuit
 Low input
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2112
 Sensor power supply circuit
 High input
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2114
 Abnormality in G & yaw rate sensor operation voltage
 Low voltage (6.5 ± 0.5 V or less)
 Enabled
 Prohibited*3 or Enabled*4
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2115
 Abnormality in G & yaw rate sensor operation voltage
 High voltage (18.0 ± 1.0 V or more)
 Enabled
 Prohibited*3 or Enabled*4
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C123A
 Abnormality in sensor calibration
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1219
 Abnormality in steering wheel sensor signal
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C121A
 Abnormality in steering wheel sensor initialisation
 Steering wheel sensor neutral point not learned
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2205
 Internal abnormality in steering wheel sensor
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C2003
 Control parameter not implement
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1395
 Brake fluid filling is not completed
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
C1608
 EEPROM error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0001
 Bus-off
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0100
 Engine time-out error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0101
 CVT time-out error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
A/T time-out error
U0126
 Steering wheel sensor time-out error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0114*3
 4WD time-out error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0141
 ETACS time-out error
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
 Enabled
U0125
 G & yaw rate sensor message time-out error/message error
 Enabled
 Prohibited*3 or Enabled*4
 Prohibited
 Prohibited
 Prohibited
 Prohibited
U0401
 Engine malfunction detected
 Enabled
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
U1003
 G & yaw rate sensor bus-off
 Enabled
 Prohibited*3 or Enabled*4
 Prohibited
 Prohibited
 Prohibited
 Prohibited
U1415
 Variant coding not implemented
 Enabled
 Prohibited
 Prohibited
 Prohibited
 Prohibited
 Prohibited
U1417
 Variant coding value invalid (includes faulty installation)
 Enabled
 Prohibited*2
 Prohibited
 Prohibited
 Prohibited
 Prohibited
note
  • *1:This diagnosis code is not set with the vehicle speed of 20 km/h or less.
  • *2: May not be prohibited depending on the trouble cause.
  • *3: Vehicles for 4WD.
  • *4: Vehicles for 2WD.

Warning lamp, indicator


Diagnosis code No.
 Item
 Brake warning lamp
 ABS warning lamp
 ASC operation display
 ASC OFF display
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
 OFF
 ON
 ON
C121E
 Abnormality in brake fluid pressure sensor output signal
 OFF
 OFF
 ON
 ON
C1000
 Abnormality in stop lamp switch circuit
 OFF
 OFF
 ON
 ON
C1009
 Low brake fluid level
 OFF
 OFF
 ON
 ON
C123B
 Prolonged operation of ASC
 OFF
 OFF
 ON
 ON
C2200
 Abnormality in ASC-ECU
 ON
 ON
 ON
 ON
C2100*3
 Abnormality in battery voltage (low voltage)
 9.7 ± 0.3 V or less
OFF
 ON
 ON
 ON
8.0 ± 0.5 V or less
 ON
 ON
 ON
 ON
C2101
 Abnormality in battery voltage (high voltage)
 18.0 ± 1.0 V or more
 ON
 ON
 ON
 ON
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
 ON*5 or OFF*6
 ON
 ON
Abnormality in longitudinal G-sensor output voltage
 OFF
 ON
 ON
 ON
Abnormality in lateral G-sensor output voltage*5
 OFF
 ON
 ON
 ON
Abnormality in yaw rate sensor output voltage
 OFF
 OFF
 ON
 ON
Abnormality in G & yaw rate sensor supply voltage
 OFF
 OFF
 ON
 ON
C2111
 Sensor power supply circuit
 Low input
 OFF
 ON
 ON
 ON
C2112
 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
 ON*5 or OFF*6
 ON
 ON
C2115
 Abnormality in G & yaw rate sensor operation voltage
 High voltage (18.0 ± 1.0 V or more)
 OFF
 ON*5 or OFF*6
 ON
 ON
C123A
 Abnormality in sensor calibration
 OFF
 ON
 ON
 ON
C1219
 Abnormality in steering wheel sensor signal
 OFF
 OFF
 ON
 ON
C121A
 Abnormality in steering wheel sensor initialisation
 Steering wheel sensor neutral point not learned
 OFF
 Flashing (2 Hz)
 OFF
 OFF
C2205
 Internal abnormality in steering wheel sensor
 OFF
 OFF
 ON
 ON
C1395
 Brake fluid filling is not completed
 OFF
 Flashing (1 Hz)
 OFF
 OFF
C1608
 EEPROM error
 OFF
 OFF
 OFF
 OFF
C2003
 Control parameter not implement
 OFF
 OFF
 ON
 ON
U0001
 Bus-off
 OFF
 OFF
 OFF
 OFF
U0100
 Engine time-out error
 OFF
 OFF
 OFF
 OFF
U0101
 CVT time-out error
 OFF
 OFF
 OFF
 OFF
A/T time-out error
U0126
 Steering wheel sensor time-out error
 OFF
 OFF
 OFF
 OFF
U0114*5
 4WD time-out error
 OFF
 OFF
 OFF
 OFF
U0141
 ETACS time-out error
 OFF
 OFF
 OFF
 OFF
U0125
 G & yaw rate sensor message time-out error/message error
 OFF
 ON*5 or OFF*6
 ON
 ON
U0401
 Engine malfunction detected
 OFF
 OFF
 ON
 ON
U1003
 G & yaw rate sensor bus-off
 OFF
 ON*5 or OFF*6
 ON
 ON
U1415
 Variant coding not implemented
 OFF
 ON
 ON
 ON
U1417
 Variant coding value invalid (includes faulty installation)
 OFF
 ON*4
 ON
 ON
note
  • *1: Turns on when two or more wheels are faulty.
  • *2: Stays on until the vehicle speed reaches 10 km/h when the ignition switch is turned to ON next time.
  • *3: This diagnosis code is not set with the vehicle speed of 20 km/h or less.
  • *4: Able to control but may not be turned ON depending on the trouble cause.
  • *5: Vehicles for 4WD.
  • *6: Vehicles for 2WD.

DIAGNOSIS CODE READING METHOD



HOW TO ERASE DIAGNOSIS CODE MEMORY



Data list output



note For service data items, refer to Workshop Manual.

ACTUATOR TEST




note
  • M.U.T.-III uses the ABS data list.
  • For the actuator test specification, refer to Workshop Manual.

CALIBRATION



note
  • M.U.T.-III uses the ABS data list.
  • *: For calibration, refer to Workshop Manual.