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.

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, the DTC U0124 (malfunction in CAN communication with the acceleration sensor) is output.

These DTCs are also output when calibration has not been completed.

DTC C1279 can be cleared when the yaw rate and acceleration sensor (airbag sensor assembly) sends a yaw rate and/or acceleration signal or the Test Mode ends. DTC C1279 is output only in the 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, either GL1 or GL2 (input signal) does not change for 30 seconds or more.

  • Acceleration sensor (Airbag sensor assembly)

  • Acceleration sensor (Airbag sensor assembly) circuit
C1243 Acceleration Sensor Stuck Malfunction While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition that the values of GL1 and GL2 do not change 0.0294 G or more occurs 16 times or more.

  • Acceleration sensor (Airbag sensor assembly)

  • Acceleration sensor (Airbag sensor assembly) circuit
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 exceeds 0.35 G for 60 seconds or more.

  • Acceleration sensor (Airbag sensor assembly)

  • Acceleration sensor (Airbag sensor assembly) circuit

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

  • Acceleration sensor (Airbag sensor assembly)

  • Sensor installation

WIRING DIAGRAM

A01QRZLE06
*1 Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)
*2 Skid Control ECU (Brake Actuator Assembly)
*3 CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

    Click here

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

    Click here

  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform acceleration sensor zero point calibration and CVT oil pressure calibration (for continuously variable transaxle).

    K111: Click here

    K111F: Click here

    K114F: 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 DTC


    1. Clear the DTC.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. At a speed of 30 km/h (19 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

    3. Check that no CAN communication system DTC is output.

      for LHD: Click here

      for RHD: Click here

    4. Check if DTCs for zero point calibration of the yaw rate sensor undone (C1210) or for zero point calibration of the acceleration sensor undone (C1336) are output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC (relating to yaw rate and acceleration sensor) is output A
      DTC (relating to CAN communication system) is output (for LHD) B
      DTC (relating to CAN communication system) is output (for RHD) C
      DTC (C1210 and/or C1336) are output D

    B

    CHECK CAN COMMUNICATION SYSTEM Click here

    C

    CHECK CAN COMMUNICATION SYSTEM Click here

    D

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

    A

  2. CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION


    1. Turn the ignition switch off.

    2. Check that the airbag sensor assembly has been installed properly.

      Click here

      OK
      The sensor should be tightened to the specified torque.
      The sensor should not be tilted position.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY Click here