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 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 a malfunction in the bus lines between the yaw rate sensor and the CAN communication system, DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) 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

  • Acceleration sensor (Yaw rate 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.

  • The output value of the acceleration sensor is more than 1.405 G in both axes for 60 seconds or more.

  • Sensor installation

  • Acceleration sensor (Yaw rate 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

  • Acceleration sensor (Yaw rate sensor)

WIRING DIAGRAM

A01FDQ4E02

INSPECTION PROCEDURE

Note

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

Tech Tips

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

PROCEDURE


  1. CHECK YAW RATE SENSOR INSTALLATION


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

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

      Tech Tips

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


    NG

    INSTALL YAW RATE SENSOR CORRECTLY Click here

    OK

    REPLACE YAW RATE SENSOR Click here