VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) receives a sensor supply voltage malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly).

The airbag sensor assembly has a built-in yaw rate and acceleration sensor and detects the vehicle condition.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1381 Acceleration Sensor Power Supply Voltage Malfunction Vehicle speed is 6 km/h (4 mph) or higher and yaw rate and acceleration sensor power supply malfunction signal is received for 1.1 seconds or more.

  • Acceleration sensor power source circuit

  • Acceleration sensor (airbag sensor assembly)

WIRING DIAGRAM

Refer to DTCs C1234, C1472 and C1474.

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CAUTION / NOTICE / HINT

Note


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

  • After replacing or reinstalling the yaw rate and acceleration sensor (airbag sensor assembly), perform system variant learning and acceleration sensor zero point calibration.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. B0070YUC03
      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

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

      OK
      The connector is securely connected.

    2. Disconnect the K73 yaw rate and acceleration sensor (airbag sensor assembly) connector.

    3. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

    4. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K73-36 (IG2) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. B0070YUC04
      *a Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly))

      Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K73-33 (E1) - Body ground Always Below 1 Ω
      K73-32 (E2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)