ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1442/44 and C1443/34

DTC Code DTC Name
C1442/44 Invalid Data Received from Acceleration Sensor
C1443/34 Invalid Data Received from Yaw Rate Sensor

DESCRIPTION

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

The airbag ECU assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1442/44

Invalid Data Received from Acceleration Sensor

572

With terminal IG1 voltage between 9.5 and 17.4 V, an invalid data signal is received from the acceleration sensor for 10 seconds or more.

Acceleration sensor (Airbag ECU assembly)

ABS DTC

C1443/34

Invalid Data Received from Yaw Rate Sensor

715

With terminal IG1 voltage between 9.5 and 17.4 V, an invalid data signal is received from the yaw rate sensor for 10 seconds or more.

Yaw rate sensor (Airbag ECU assembly)

VSC DTC

CAUTION / NOTICE / HINT

Note:

When replacing the yaw rate and acceleration sensor (airbag ECU assembly), perform zero point calibration.

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PROCEDURE

  1. CHECK DTC

    1. Clear the DTCs.

      Click here

      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the power switch off.

    3. Check if the same DTC is output.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

    Result

    Result

    Proceed to

    DTCs C1442/44 and C1443/34 are not output.

    A

    DTCs C1442/44 and/or C1443/34 are output.

    B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    B

    REPLACE AIRBAG ECU ASSEMBLY

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