VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232, C1243, C1245, C1279

DTC Code DTC Name
C1232 Acceleration Sensor Stuck Malfunction
C1243 Acceleration Sensor Stuck Malfunction
C1245 Acceleration Sensor Output Malfunction
C1279 Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)

DESCRIPTION

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

Tech Tips

If there is a malfunction in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is output. When U0124 is output together with C1232, C1243 and/or C1245, inspect and repair the trouble areas indicated by U0124 first.

DTCs may be stored if either of the following occurs:


DTC C1279 can be deleted when the yaw rate and acceleration sensor (airbag sensor assembly) sends a yaw rate and/or acceleration signal or when Test Mode ends. DTC C1279 is output only in Test Mode.

DTC No. DTC Detection Condition Trouble Area
C1232 At a vehicle speed of 10 km/h (6 mph) or more, the acceleration sensor output value does not change for 30 seconds or more.

  • Sensor installation

  • Yaw rate and acceleration sensor (Airbag sensor assembly)
C1243 While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition in which the value of the acceleration sensor does not change by 0.0294 G or more, occurs 16 times or more.

  • Sensor installation

  • Yaw rate and acceleration sensor (Airbag sensor assembly)
C1245 At a vehicle speed of 30 km/h (19 mph) or more, the difference between the forward and backward G calculated from the acceleration sensor value and that calculated from the vehicle speed sensor exceeds 0.35 G for 60 seconds or more.

  • Sensor installation

  • Yaw rate and acceleration sensor (Airbag sensor assembly)
C1279 Detected only during Test Mode.

  • Sensor installation

  • Yaw rate and acceleration sensor (Airbag sensor assembly)

INSPECTION PROCEDURE

Note

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

Tech Tips

When U0124 and/or U0126 is output together with C1232, C1243, and/or C1245, inspect and repair the trouble areas indicated by U0124 and/or U0126 first Click here.

PROCEDURE


  1. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION


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

      OK
      The sensor should be tightened to the specified torque.
      The sensor should not be installed in a tilted position.

      Note

      Check the yaw rate and acceleration sensor signal after replacement Click here.

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts Click here.


    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here