Code No. C104B FL inlet valve
Code No. C104F FR inlet valve
Code No. C1053 RL inlet valve
Code No. C1057 RR inlet valve
Code No. C105F FL outlet valve
Code No. C1063 FR outlet valve
Code No. C1067 RL outlet valve
Code No. C105B RR outlet valve


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 - CAN Bus Diagnostics Table ).
OPERATION
  • ABS-ECU contains the power supply circuit (+ BV terminal) for the solenoid valve. The solenoid valve is energised by the valve relay, which is incorporated in ABS-ECU.
  • The valve relay, which is incorporated in ABS-ECU, is always energising the solenoid valve unless the initial check is in progress when the ignition switch is turned on, and the recurrent system check is in progress.
  • ABS-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 ABS-ECU has turned on the driving transistor (Open circuit is present in the power supply circuit to the ABS-ECU solenoid valve, or the valve relay has failed).
  • The solenoid valve is not energised even after ABS-ECU has turned on the driving transistor (Open circuit is present in the solenoid valve circuit in ABS-ECU, or the valve relay has failed).
  • After ABS-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

  • ABS-ECU malfunction

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
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 Diagnostics 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.
Erase the diagnosis code.

Q. Is the relevant diagnosis code set?
Replace the hydraulic unit (integrated with ABS-ECU) (Refer to ). Then go to Step 4.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/ How to Cope with Intermittent Malfunctions ).

STEP 4. Check whether the diagnosis code is reset.
Erase the diagnosis code.

Q. Is the relevant diagnosis code set?
Return to Step 1.
This diagnosis is complete.