VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster), Diagnostic DTC:C120A

DTC Code DTC Name
C120A ECU Initial Setting Incomplete

DESCRIPTION

The master cylinder solenoid (skid control ECU) records information on whether there is a kinetic dynamic suspension system or not.

w/ Downhill Assist Control or w/ Crawl Control:

When the master cylinder solenoid (skid control ECU) is replaced, the master cylinder solenoid (skid control ECU) must be informed that the vehicle is equipped with downhill assist control and/or crawl control.

DTC Code DTC Detection Condition Trouble Area
C120A

Either condition is met:


  • The master cylinder solenoid is not informed that the vehicle is equipped with downhill assist control or crawl control and downhill assist control or crawl control operates.

  • There is no information on whether there is a kinetic dynamic suspension system or not.

 Calibration not performed

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM CALIBRATION


    1. Perform calibration Click here.

      Note

      If a DTC is output after replacing the master cylinder solenoid, it is possible that calibration has not been performed or the zero point calibration data was not cleared when calibration was performed.


    NEXT

  2. CHECK DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    END

    A

  3. CHECK TEST MODE DTC


    1. Switch the vehicle to test mode, perform the downhill assist control switch or crawl switch signal check, and then check that Test Mode (Signal Check) DTC C1379 is cleared Click here.

      Result
      Result Proceed to
      Test Mode DTC C1379 is not cleared A
      Test Mode DTC C1379 is cleared B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    GO TO DTC C1379 Click here