VEHICLE STABILITY CONTROL SYSTEM(for TMC Made), 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 (airbag sensor assembly) via the CAN communication system.

The yaw rate sensor (airbag sensor assembly) 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 yaw rate sensor (airbag sensor assembly) 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.

  • Yaw rate sensor (Airbag sensor assembly)

  • Yaw rate sensor (Airbag sensor assembly) power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243, C1245 and C1473 Click here.

CAUTION / NOTICE / HINT

Note


  • When replacing the brake actuator 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 TERMINAL VOLTAGE (IG2 TERMINAL)


    1. A01VI1KE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor (Airbag Sensor Assembly))

      Disconnect the yaw rate sensor (airbag sensor assembly) 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
      F16-21 (IG2) - Body ground Ignition switch ON 11 to 14 V

    4. Turn the ignition switch off.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. A01VGDXE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor (Airbag Sensor Assembly))

      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 yaw rate sensor (airbag sensor assembly) 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.

    2. Reconnect the yaw rate sensor (airbag sensor assembly) 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 YAW RATE SENSOR (AIRBAG SENSOR ASSEMBLY) Click here