ELECTRONICALLY CONTROLLED BRAKE SYSTEM(w/o Vacuum Brake Booster), Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor

DESCRIPTION

This DTC is stored when the skid control ECU assembly receives a sensor supply voltage malfunction signal from the yaw rate sensor.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1381 Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor 315 At a vehicle speed of 3 km/h (2 mph) or more, a supply voltage malfunction signal is received from the sensor for 10 seconds or more.

  • Improperly connected connector, deformation or corrosion of terminals

  • Acceleration sensor (Yaw rate sensor) power supply

  • Skid control ECU assembly

 -

WIRING DIAGRAM

B006G7ZE02
*a Engine Stop and Start ECU
*b Yaw Rate Sensor
*c CAN Communication Line
*d Skid Control ECU Assembly

CAUTION / NOTICE / HINT

Note


  • When replacing the yaw rate sensor, perform initialization and calibration of the linear solenoid valve.

    Click here

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IG TERMINAL)


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

    2. Disconnect the G42 yaw rate 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
      G42-4 (IG) - Body ground Engine switch on (IG) 10.5 to 16 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. 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
      G42-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  3. RECONFIRM DTC


    1. Reconnect the G42 yaw rate sensor connector.

    2. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    3. Turn the engine switch off.

    4. Start the engine.

    5. Perform a road test.

    6. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1381 is not output. A
      DTC C1381 is output. B

      Note

      Check the yaw rate sensor signal after replacement.

      Click here


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE YAW RATE SENSOR Click here