Code No. C2111 Brake Fluid Pressure Sensor Power Supply Circuit
Code No. C2112 Brake Fluid Pressure Sensor Power Supply Circuit


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
When the brake pedal is depressed, the brake fluid pressure sensor integrated in the hydraulic unit detects the brake fluid pressure applied from the master cylinder, converts the pressure value into voltage signal, and outputs it.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when the voltage applied to the pressure sensor is not within the standard value range.

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. Are the diagnosis codes C2111 or C2112 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. Battery check
Refer to GROUP 54A - Battery Test .

Q. Is the battery in good condition?
Go to Step 4.
Charge or replace the battery, and then go to Step 6.

STEP 4. Charging system check
Refer to GROUP 16 - Charging System <4A9>, <4B1>, <BWC>, <4B1-T/C>.

Q. Is the charging system in good condition?
Go to Step 5.
Repair or replace the charging system component(s), and then go to Step 6.

STEP 5. Check whether the diagnosis code is reset.

Q. Are the diagnosis codes C2111 or C2112 set?
Replace the hydraulic unit (ASC-ECU) (Refer to ), and then go to Step 6.
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 6. Check whether the diagnosis code is reset.

Q. Are the diagnosis codes C2111 or C2112 set?
Return to Step 1.
This diagnosis is complete.