VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the yaw rate sensor assembly via the CAN communication system.

The yaw rate sensor assembly has a built-in acceleration sensor.

If there is trouble 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 stored.

DTC C1381 is also stored when calibration has not been completed.

DTC Code DTC Detection Condition Trouble Area
C1381 At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more.

  • ECU-IG&GAUGE fuse

  • Acceleration sensor (Yaw rate sensor assembly)

  • Yaw rate sensor assembly power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 Click here.

INSPECTION PROCEDURE

Note


  • After replacing the yaw rate sensor assembly, perform calibration Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • Before disconnecting the connector, make sure that there are no problems with the connection.

  • After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (IG TERMINAL)


    1. Turn the ignition switch off.

    2. Disconnect the yaw rate sensor assembly connector.

    3. A01DV1GE25
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y1-4 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Turn the ignition switch off.

    2. Disconnect the yaw rate sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y1-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 3 km/h (2 mph) or more for at least 10 seconds or more.

    5. Check if the same DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

      Tech Tips

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


    B

    REPLACE YAW RATE SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here