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).

DTC No. DTC Detection Condition Trouble Area
C1381 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 power source circuit

  • Yaw rate and acceleration sensor (Airbag sensor assembly)

WIRING DIAGRAM

A01G632E01

INSPECTION PROCEDURE

Note


  • When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration Click here.

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A01G7FWE17
      Text in Illustration
      *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.

    2. Disconnect the H36 yaw rate and acceleration sensor (airbag sensor assembly) 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 Condition Specified Condition
      H36-21 (IG2) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A01G7FWE18
      Text in Illustration
      *a

      Front view of wire harness connector

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

      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
      H36-25 (E1) - Body ground Always Below 1 Ω
      H36-26 (E2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

    OK

  3. RECONFIRM DTC


    1. Reconnect the H36 yaw rate and acceleration sensor (airbag sensor assembly) connector.

    2. Clear the DTCs Click here.

    3. Turn the engine switch off.

    4. Start the engine.

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

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

      Result
      Result Proceed to
      DTC C1381 is not output. A
      DTC C1381 is output B

      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 before replacing parts Click here.


    B

    REPLACE AIRBAG SENSOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here