VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232, C1243, C1245, C1279, C1473

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)
C1473 Yaw Rate Sensor (Test Mode DTC)

DESCRIPTION

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

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

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 DTC 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 cleared 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. Detection Item DTC Detection Condition Trouble Area
C1232 Acceleration Sensor Stuck Malfunction At a vehicle speed of 10 km/h (6 mph) or more, the acceleration sensor output value does not change for 1 second or more.

  • Sensor installation

  • Acceleration sensor (airbag sensor assembly)
C1243 Acceleration Sensor Stuck Malfunction

Either of the following is detected:


  1. 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.

  2. The output value of the acceleration sensor is more than 1.405 G in both axes for 60 seconds or more.

  • Sensor installation

  • Acceleration sensor (airbag sensor assembly)
C1245 Acceleration Sensor Output Malfunction 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

  • Acceleration sensor (airbag sensor assembly)
C1279 Acceleration Sensor Output Voltage Malfunction (Test Mode DTC) Detected only during Test Mode.

  • Sensor installation

  • Acceleration sensor (airbag sensor assembly)
C1473 Yaw Rate Sensor (Test Mode DTC) Detected only during Test Mode. Yaw rate sensor (airbag sensor assembly)

Tech Tips

for C1243 and C1245: Even after the trouble areas are repaired, the ABS warning light will not go off unless the following operations are performed.


  1. Drive the vehicle at 30 km/h (19 mph) for 30 seconds or more and check that the ABS warning light goes off.

  2. Clear the DTCs.

CAUTION / NOTICE / HINT

Note

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

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Tech Tips

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

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PROCEDURE


  1. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION


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

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

      Note

      Check the yaw rate and acceleration sensor signal after replacement.

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      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.

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      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here