Code No. C104B Abnormality in FL wheel inlet valve system
Code No. C104F Abnormality in FR wheel inlet valve system
Code No. C1053 Abnormality in RL wheel inlet valve system
Code No. C1057 Abnormality in RR wheel inlet valve system
Code No. C105F Abnormality in FL wheel outlet valve system
Code No. C1063 Abnormality in FR wheel outlet valve system
Code No. C1067 Abnormality in RL wheel outlet valve system
Code No. C105B Abnormality in RR wheel outlet valve system
Code No. C1200 Abnormality in FL/RR wheel cut valve system
Code No. C1204 Abnormality in FR/RL wheel cut valve system
Code No. C1208 Abnormality in FL/RR wheel suction valve system
Code No. C120C Abnormality in FR/RL wheel suction valve system




caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, Trouble code diagnosis ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor, the G and yaw rate sensor and brake fluid pressure sensor (Refer to , and ).
OPERATION
  • ASC-ECU contains the power supply circuit (terminal No. 32) for the solenoid valve. The solenoid valve is energised by the valve relay, which is incorporated in ASC-ECU.
  • The valve relay, which is incorporated in ASC-ECU, is always energising the solenoid valve unless the initial check is in progress when the ignition switch is turned on, or the recurrent system check is in progress.
  • ASC-ECU activates the solenoid valve by turning on its driving transistor.

DIAGNOSIS CODE SET CONDITIONS


These diagnosis codes will be set under the cases below:

  • The solenoid valve is not energized even after ASC-ECU has turned on the driving transistor (Open circuit is present in the power supply circuit to the ASC-ECU solenoid valve, or the valve relay has failed).
  • After ASC-ECU has turned off the driving transistor, the solenoid valve still remains energized (short in the solenoid valve circuit).
  • When a solenoid valve failure is detected

PROBABLE CAUSES



  • ASC-ECU malfunction

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnosis


Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis table ). On completion, go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines


Q. Is the relevant diagnosis code set?

Go to Step 3.
This diagnosis is complete.

STEP 3. Check whether the diagnosis code is reset.


Q. Is the relevant diagnosis code set?

Replace the ASC-ECU (Refer to ). Then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is reset.


Q. Is the relevant diagnosis code set?

Return to Step 1.
This diagnosis is complete.