VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1452

DTC Code DTC Name
C1452 Accumulator Low Pressure

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1452

Accumulator Low Pressure

After braking, the fluid pressure inside the accumulator is less than the threshold within 3.2 seconds.

  • Hydraulic circuit

  • Master cylinder solenoid (Accumulator pressure sensor)

CAUTION / NOTICE / HINT

Note:

When replacing the master cylinder solenoid, perform calibration (Click here).

PROCEDURE

  1. CUSTOMER PROBLEM ANALYSIS

    1. Check with the customer to determine if frequent braking has been performed.

      Result

      Result

      NEXT
    NEXT

  2. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Depress the brake pedal more than 40 times.

    4. Turn the engine switch on (IG).

    5. Wait for 99 seconds.

    6. Check if the same DTC is output.

      Result

      Result

      Proceed to

      DTC is output

      A

      Frequent braking was not performed and DTC is not output

      B

      Frequent braking was performed and DTC is not output

      C
      Tip:

      Excessive brake pedal operation results in abnormal accumulator pressure consumption. This is normal.

      Chassis > ABS/VSC/TRC > Trouble Codes

    B

    USE SIMULATION METHOD TO CHECK

    Click here

    C

    END

    A

  3. CHECK HYDRAULIC CIRCUIT

    1. Check the hydraulic circuit.

      Click here

      OK

      Hydraulic circuit is normal (no leakage).

      Result

      Result

      OK

      NG
    NG

    REPAIR HYDRAULIC CIRCUIT

    OK

  4. READ VALUE USING INTELLIGENT TESTER (ACCUMULATOR SENSOR)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Accumulator Sensor

      Accumulator pressure sensor reading

      Min.: 0.00 V, Max.: 5.00 V

      3.58 to 5 V

      If the value is constant regardless of the pump operation, an accumulator pressure sensor malfunction is suspected.

    5. Check that the accumulator output value is normal.

      OK

      Accumulator pressure sensor value is normal.

      Result

      Result

      OK

      NG
    NG

    REPLACE MASTER CYLINDER SOLENOID

    Click here

    OK

  5. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Check if the same DTC is output.

      Click here

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B

      Chassis > ABS/VSC/TRC > Trouble Codes

    A

    USE SIMULATION METHOD TO CHECK

    Click here

    B

    REPLACE MASTER CYLINDER SOLENOID

    Click here