ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1232, C1243, C1245

DTC Code DTC Name
C1232 Deceleration Sensor
C1243 Deceleration Sensor Stuck
C1245 Abnormal Output in Deceleration Sensor

DESCRIPTION

The airbag sensor 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 sensor assembly) via the CAN communication system.

Tech Tips

When a malfunction occurs in the communication line to the yaw rate and acceleration sensor (airbag sensor assembly), U0124 (Lost Communication With Lateral Acceleration Sensor Module) is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

A DTC may be stored if either of the following is detected:


DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1232 Deceleration Sensor

562

563

 When the vehicle speed is 10 km/h (6 mph) or more, the acceleration sensor output value does not change for 30 seconds or more.

  • Acceleration sensor (airbag sensor assembly) installed improperly

  • Acceleration sensor (airbag sensor assembly)

 ABS DTC
C1243 Deceleration Sensor Stuck

561

564

565

  • INF Code: 561


    • The acceleration sensor output value does not change 16 times or more before the vehicle speed reaches 0 km/h (0 mph) from 30 km/h (19 mph).

  • INF Code: 564


    • The longitudinal and lateral output values of the acceleration sensor are not within the specified range for 60 seconds or more.

  • INF Code: 565


    • The lateral output value of the acceleration sensor is not within the specified range for 60 seconds or more.

  • Acceleration sensor (airbag sensor assembly) installed improperly

  • Acceleration sensor (airbag sensor assembly)

 ABS DTC
C1245 Abnormal Output in Deceleration Sensor 581 When the vehicle speed is 30 km/h (19 mph) or more, the difference between the deceleration value from the acceleration sensor and deceleration value calculated from the change in vehicle speed exceeds 0.35 G for 60 seconds or more.

  • Acceleration sensor (airbag sensor assembly) installed improperly

  • Acceleration sensor (airbag sensor assembly)

 ABS DTC

CAUTION / NOTICE / HINT

Note

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

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.

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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.

      Click here

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

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here