VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1232,C1243 and 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 sensor assembly) via the CAN communication system.

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

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 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

  • 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 sensor assembly)

  • Acceleration sensor (Airbag sensor 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 sensor assembly)

  • Acceleration sensor (Airbag sensor assembly) circuit

  • Sensor installation

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

Tip:

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 ignition 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 with Central Gateway ECU:Click hereClick here

      for RHD with Central Gateway ECU:Click hereClick hereClick here

      for LHD without Central Gateway ECU:Click hereClick here

      for RHD without Central Gateway ECU:Click hereClick 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 (for LHD with Central Gateway ECU)

      B

      DTC (relating to CAN communication system) is output (for RHD with Central Gateway ECU)

      C

      DTC (relating to CAN communication system) is output (for LHD without Central Gateway ECU)

      D

      DTC (relating to CAN communication system) is output (for RHD without Central Gateway ECU)

      E

      DTC (C1210 and/or C1336) are output

      F
    B

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    C

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    D

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    E

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    F

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC

    Click hereClick 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