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 receives signals from the yaw rate and acceleration sensor via the CAN communication system.

The yaw rate sensor has a built-in 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 and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are set.

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

DTC Code DTC Detection Condition Trouble Area
C1232 At a vehicle speed of 10 km/h (6 mph) or more, acceleration sensor output value does not change for 30 seconds or more.

  • Sensor installation

  • Yaw rate and acceleration sensor
C1243 While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition that the value of acceleration sensor does not change by 0.0294 G or more occurs 16 times or more.

  • Sensor installation

  • Yaw rate and acceleration sensor
C1245 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

  • Yaw rate and acceleration sensor

WIRING DIAGRAM

A017F8DE02

INSPECTION PROCEDURE

Note

When replacing the yaw rate and acceleration sensor, perform zero point calibration Click here.

Tech Tips

When U0123, U0124 and/or U0126 is output together with C1232, C1243, and/or C1245, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first Click here.

PROCEDURE


  1. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION


    1. Check that the yaw rate and acceleration sensor has been installed properly Click here.

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

      Note

      Check the yaw rate and acceleration sensor signal after replacement Click here.

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    NG

    INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY Click here

    OK

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here