ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1442/44, 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.

Click here

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 here

    B

    REPLACE AIRBAG ECU ASSEMBLY Click here