ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1420

DTC Code DTC Name
C1420 Malfunction in Deceleration Sensor

DESCRIPTION

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).

The skid control ECU (brake booster with master cylinder assembly) receives signals from the yaw rate and acceleration sensor (airbag ECU assembly) via CAN communication.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1420 Malfunction in Deceleration Sensor 571 After the difference between GL1 and GL2 is 0.6 G or more with the vehicle stopped, the difference between GL1 and GL2 does not drop below 0.4 G or more for 60 seconds or more.

  • Acceleration sensor (airbag ECU assembly) installed improperly

  • Acceleration sensor (airbag ECU assembly)

 ABS DTC

CAUTION / NOTICE / HINT

Note

After replacing or reinstalling the yaw rate and acceleration sensor (airbag ECU assembly), perform yaw rate and acceleration sensor zero point calibration after clearing previously calibrated data.

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PROCEDURE


  1. CHECK AIRBAG ECU ASSEMBLY INSTALLATION


    1. Check that the yaw rate and acceleration sensor (airbag ECU assembly) has been installed properly.

      Click here

      OK
      The yaw rate and acceleration sensor (airbag ECU assembly) is tightened to the specified torque.
      The yaw rate and acceleration sensor (airbag ECU assembly) is not tilted.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG ECU ASSEMBLY Click here

    NG

    INSTALL AIRBAG ECU ASSEMBLY CORRECTLY Click here