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

DTC Code DTC Name
C1232 Acceleration Sensor Stuck Malfunction
C1243 Acceleration Sensor Stuck Malfunction
C1245 Acceleration Sensor Output Malfunction

DESCRIPTION

The skid control ECU (brake actuator 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's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag ECU 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 No. Detection Item DTC Detection Condition Trouble Area Note
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 ECU assembly)

  • Acceleration sensor (Airbag ECU assembly) circuit

  • Sensor installation

 -
C1243 Acceleration Sensor Stuck Malfunction

Either of the following is detected:


  • Output values of GL1 and GL2 do not change 16 times or more while vehicle speed decreases from 30 km/h (19 mph) to 0 km/h (0 mph).

  • Output values of GL1 and GL2 (front and rear, left and right) are outside permitted output range for 60 seconds or more.

  • Left and right output values of GL1 and GL2 are outside permitted output range for 60 seconds or more.

  • Acceleration sensor (Airbag ECU assembly)

  • Acceleration sensor (Airbag ECU assembly) circuit

  • Sensor installation

 -
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 ECU assembly)

  • Acceleration sensor (Airbag ECU assembly) circuit

  • Sensor installation

 -

WIRING DIAGRAM

B0058TQE08
*1 A/BAG
*2 Yaw Rate and Acceleration Sensor (Airbag ECU Assembly)
*3 Skid Control ECU (Brake Actuator Assembly)
*4 CAN Communication Line

CAUTION / NOTICE / HINT

Note


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

    Click here

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

    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. Turn the engine switch off.

    3. Start the engine.

    4. 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.

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

      for LHD: Click here

      for RHD: Click here

    6. 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 B
      DTC (C1210 and/or C1336) are output C

    B

    CHECK CAN COMMUNICATION SYSTEM for LHD: Click here
    CHECK CAN COMMUNICATION SYSTEM for RHD: Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

    A

  2. CHECK AIRBAG ECU ASSEMBLY INSTALLATION


    1. Turn the engine switch off.

    2. Check that the airbag ECU 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 ECU ASSEMBLY Click here

    NG

    INSTALL AIRBAG ECU ASSEMBLY CORRECTLY Click here