VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C0371/71, C1234/34, C1243/43, C1244/44, C1245/45, C1279/79, C1381/97

DTC Code DTC Name
C0371/71 Yaw Rate Sensor (Test Mode DTC)
C1234/34 Yaw Rate Sensor Malfunction
C1243/43 Acceleration Sensor Stuck Malfunction
C1244/44 Open or Short in Acceleration Sensor Circuit
C1245/45 Acceleration Sensor Output Malfunction
C1279/79 Acceleration Sensor Output Voltage Malfunction (Test Mode DTC)
C1381/97 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor through 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 U0123/62 (Lost Communication with Yaw Rate Sensor Module) and U0124/95 (Lost Communication with Lateral Acceleration Sensor Module) are output.

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

DTCs C0371/71 and C1279/79 will be deleted when the yaw rate and acceleration sensor sends a yaw rate and/or acceleration signal or when Test Mode ends. DTCs C0371/71 and C1279/79 are output only in Test Mode.

DTC Code DTC Detection Condition Trouble Area
C1234/34 Sensor malfunction signal is received from the yaw rate sensor.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor circuit

  • Sensor installation
C1243/43 While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the values of GL1 and GL2 do not change 16 times or more.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor circuit
C1244/44

Either of the following is detected:


  1. A data malfunction signal is received from the acceleration sensor.

  2. After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or more for 60 seconds or more.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor circuit
C1245/45 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.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor circuit

  • Sensor installation
C1381/97 At a vehicle speed of more than 3 km/h (2 mph), an acceleration sensor power source malfunction signal is received for 10 seconds or more.

  • Yaw rate and acceleration sensor

  • Yaw rate and acceleration sensor power source circuit
C0371/71 Detected only during Test Mode. Yaw rate and acceleration sensor
C1279/79 Detected only during Test Mode.

  • Sensor installation

  • Yaw rate and acceleration sensor

WIRING DIAGRAM

A0163ASE12

INSPECTION PROCEDURE

Note

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

Tech Tips

When U0123/62 and/or U0124/95 is output together with C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62 and/or U0124/95 first Click here.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs Click here.

    2. Turn the engine switch off.

    3. Start the engine.

    4. Driving the vehicle at a speed of 30 km/h (18 mph) or more, turn the steering wheel, and decelerate the vehicle (depress the brake pedal).

    5. Turn the engine switch on (IG) again and check that no CAN communication system DTC is output Click here.

    6. Check if DTC C1210/36 (Zero Point Calibration of Yaw Rate Sensor Undone) or C1336/98 (Zero Point Calibration of Acceleration Sensor Undone) is output Click here.

      Result
      Result Proceed to
      DTCs (C1210/36, C1336/98 and CAN communication system DTC) are not output A
      CAN communication system DTC is output B
      DTCs (C1210/36 and/or C1336/98) are output C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    REPAIR CIRCUIT INDICATED BY OUTPUT DTC Click here

    A

  2. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION


    1. Turn the engine switch off.

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

      OK
      The sensor is tightened to the specified torque.
      The sensor is not tilted.

    NG

    INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY Click here

    OK

  3. INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)


    1. A0162TCE15

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

    2. Disconnect the yaw rate and acceleration sensor connector.

    3. Turn the engine switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      J41-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    OK

  4. INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)


    1. A0162TCE12

      Turn the engine switch off.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      J41-1 (GND) - Body ground Always Below 1 Ω

      Note

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

      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

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here