VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1381

DTC Code DTC Name
C1381 Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

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

The center airbag sensor assembly (yaw rate sensor) has a built in deceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the center airbag sensor assembly (yaw rate sensor) and the CAN communication system, the DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are output.

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

DTC NO. 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.

  • Center airbag sensor assembly (Yaw rate sensor)

  • Center airbag sensor assembly (Yaw rate sensor) power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 Click here.

CAUTION / NOTICE / HINT

Note


  • When replacing the deceleration sensor, be sure to perform deceleration sensor 0 point calibration and CVT oil pressure calibration after performing AT/CVT learned values initialization.

    for K310 Click here

    for K411 Click here

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

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (IG TERMINAL)


    1. A005JHEE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Center airbag sensor assembly (Yaw rate sensor))

      Disconnect the F16 center airbag sensor assembly (yaw rate sensor) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F16-4 (IG2) - Body ground Ignition switch ON 11 to 14 V

    4. Reconnect the F16 center airbag sensor assembly (yaw rate sensor) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Disconnect the F16 center airbag sensor assembly (yaw rate sensor) connector.

    2. A005L19E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Center airbag sensor assembly (Yaw rate sensor))

      Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F16-25 (E1) - Body ground Always Below 1 Ω
      F16-26 (E2) - Body ground Always Below 1 Ω

      Note

      Check the center airbag sensor assembly (yaw rate sensor) signal after replacement Click here.

      Tech Tips

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

    4. Reconnect the F16 center airbag sensor assembly (yaw rate sensor) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  3. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Start the engine.

    3. Perform a road test.

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1381) is not output A
      DTC (C1381) is output B

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPLACE CENTER AIR BAG SENSOR ASSEMBLY (YAW RATE SENSOR) Click here